Co–Ta system
151 accepted literature values from 4 paper(s) (experimental 76, model 34, DFT 33, unspecified 8); 6 calculated phase diagram(s). 8 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.
Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (19) · papers (bibliography) · Markdown
| Evidence class | Values |
|---|---|
| experimental | 76 |
| model | 34 |
| DFT | 33 |
| unspecified | 8 |
| Property group | Values |
|---|---|
| invariant reaction | 70 |
| phase transition | 24 |
| phase equilibrium | 24 |
| formation | 33 |
Calculated phase diagrams
Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.
| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| CoTa-02Har.tdb | K.C. Hari Kumar, T. Van Rompaey, P. Wollants, Z. Metallkd., 93, 1146-53(2002). doi:10.1515/ijmr-2002-0196 | c7251b1bb94512ab00d2bd194c887814d6afefeafabe1a722f6d182d126e0cb3 | viewer · TDB · JSON |
| CoTa-14Shi.tdb | K. Shinagawa, H. Chinen, T. Omori, K. Oikawa, I. Ohnuma, K. Ishida, R. Kainuma, Intermetallics, 49, 87-97(2014). doi:10.1016/j.intermet.2014.01.015 | e4d873cf93726ad06aff5ab76bb4ebede1cc575e6558c11799e931164ecb0a63 | viewer · TDB · JSON |
| CoTa-19Wan.tdb | P. Wang, J. Kossmann, U.R. Kattner, M. Palumbo, T. Hammerschmidt, G.B. Olson, Calphad, 64, 205-12(2019). doi:10.1016/j.calphad.2018.12.002 | 0188b050430162f44674316c31f37ec02a3d98082cebe590ce658b2d200c5572 | viewer · TDB · JSON |
| CoTa-19Zho.tdb | C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 66, 101649(2019). doi:10.1016/j.calphad.2019.101649 | f38abf64bd567e762a5855706cb2c9cc37ba4fcf2a5bfe7e86afcc1177576c7f | viewer · TDB · JSON |
| CoTa-22Wan.tdb | C. Wang, X. Chen, P. Yang, Q. Zhang, S. Yang, Y. Lu, Y. Guo, X. Liu, J. Alloys Compd., 925, 166723(2022). doi:10.1016/j.jallcom.2022.166723 | cab3db05a3994913cc4934ccc9d4fb961c21df10e4243f5d57c7292e0ffbcd83 | viewer · TDB · JSON |
| CoTa-99Liu-LB.tdb | Z.-K. Liu, Y.A. Chang, Calphad, 23, 339-56(1999). doi:10.1016/S0364-5916(00)00005-5 | 2d4f912a1ca1b7373b7dc43c8c9df22d1fdd60ea4de8a4efd2589c46e3bd0565 | viewer · TDB · JSON |
| TDB file | T (K) | Phases at the invariant |
|---|---|---|
| CoTa-02Har.tdb | 2056.85 | LIQUID (x(Ta) 0.64626) + COTA2_C16 (x(Ta) 0.66667) + BCC_A2 (x(Ta) 0.8606) |
| CoTa-02Har.tdb | 2056.85 | LIQUID (x(Ta) 0.64627) + COTA2_C16 (x(Ta) 0.66667) + BCC_A2 (x(Ta) 0.86061) |
| CoTa-02Har.tdb | 1911.63 | MU_D85 (x(Ta) 0.51912) + LIQUID (x(Ta) 0.55082) + COTA2_C16 (x(Ta) 0.66667) |
| CoTa-02Har.tdb | 1911.63 | MU_D85 (x(Ta) 0.51916) + LIQUID (x(Ta) 0.55106) + COTA2_C16 (x(Ta) 0.66667) |
| CoTa-02Har.tdb | 1843.4 | C15_LAVES (x(Ta) 0.33892) + LIQUID (x(Ta) 0.40693) + MU_D85 (x(Ta) 0.48396) |
| CoTa-02Har.tdb | 1812.91 | C15_LAVES (x(Ta) 0.33858) + CO16TA9_C14 (x(Ta) 0.36) + MU_D85 (x(Ta) 0.48374) |
| CoTa-02Har.tdb | 1720.72 | LIQUID (x(Ta) 0.19165) + CO3TA_C36 (x(Ta) 0.25) + C15_LAVES (x(Ta) 0.29407) |
| CoTa-02Har.tdb | 1552.64 | FCC_A1 (x(Ta) 0.05264) + LIQUID (x(Ta) 0.12393) + CO3TA_C36 (x(Ta) 0.25) |
| CoTa-02Har.tdb | 1552.64 | FCC_A1 (x(Ta) 0.05261) + LIQUID (x(Ta) 0.12383) + CO3TA_C36 (x(Ta) 0.25) |
| CoTa-02Har.tdb | 1402.13 | C15_LAVES (x(Ta) 0.335) + CO16TA9_C14 (x(Ta) 0.36) + MU_D85 (x(Ta) 0.48072) |
| CoTa-02Har.tdb | 1235.45 | FCC_A1 (x(Ta) 0.02327) + CO7TA2 (x(Ta) 0.22222) + CO3TA_C36 (x(Ta) 0.25) |
| CoTa-02Har.tdb | 1235.45 | FCC_A1 (x(Ta) 0.02325) + CO7TA2 (x(Ta) 0.22222) + CO3TA_C36 (x(Ta) 0.25) |
| CoTa-02Har.tdb | 1235.45 | FCC_A1 (x(Ta) 0.02328) + CO7TA2 (x(Ta) 0.22222) + CO3TA_C36 (x(Ta) 0.25) |
| CoTa-02Har.tdb | 682.97 | HCP_A3 (x(Ta) 0) + FCC_A1 (x(Ta) 0.00126) + CO7TA2 (x(Ta) 0.22222) |
| CoTa-02Har.tdb | 682.97 | HCP_A3 (x(Ta) 0) + FCC_A1 (x(Ta) 0.00125) + CO7TA2 (x(Ta) 0.22222) |
| CoTa-02Har.tdb | 682.97 | HCP_A3 (x(Ta) 0) + FCC_A1 (x(Ta) 0.00125) + CO7TA2 (x(Ta) 0.22222) |
| CoTa-14Shi.tdb | 2225.5 | LIQUID (x(Ta) 0.66335) + COTA2_C16 (x(Ta) 0.68661) + BCC_A2 (x(Ta) 0.93278) |
| CoTa-14Shi.tdb | 1957.44 | MU_D85 (x(Ta) 0.53561) + LIQUID (x(Ta) 0.58037) + COTA2_C16 (x(Ta) 0.62275) |
| CoTa-14Shi.tdb | 1860.25 | CO2TA_C15 (x(Ta) 0.34069) + CO2TA_C14 (x(Ta) 0.36023) + LIQUID (x(Ta) 0.40109) |
| CoTa-14Shi.tdb | 1830.23 | CO2TA_C14 (x(Ta) 0.36788) + LIQUID (x(Ta) 0.42009) + MU_D85 (x(Ta) 0.45781) |
| CoTa-14Shi.tdb | 1714.19 | LIQUID (x(Ta) 0.18136) + CO2TA_C36 (x(Ta) 0.2713) + CO2TA_C15 (x(Ta) 0.27532) |
| CoTa-14Shi.tdb | 1583.65 | FCC_A1 (x(Ta) 0.05927) + LIQUID (x(Ta) 0.13228) + CO2TA_C36 (x(Ta) 0.23584) |
| CoTa-14Shi.tdb | 1583.65 | L12_FCC (x(Ta) 0.05927) + LIQUID (x(Ta) 0.13228) + CO2TA_C36 (x(Ta) 0.23584) |
| CoTa-14Shi.tdb | 1566.21 | CO2TA_C15 (x(Ta) 0.34205) + CO2TA_C14 (x(Ta) 0.36589) + MU_D85 (x(Ta) 0.46079) |
| CoTa-14Shi.tdb | 1306.26 | FCC_A1 (x(Ta) 0.01522) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.24136) |
| CoTa-14Shi.tdb | 1306.26 | L12_FCC (x(Ta) 0.01522) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.24136) |
| CoTa-14Shi.tdb | 1220.39 | CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.25793) + CO2TA_C15 (x(Ta) 0.2634) |
| CoTa-14Shi.tdb | 1220.39 | CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.25793) + CO2TA_C15 (x(Ta) 0.2634) |
| CoTa-14Shi.tdb | 887.37 | FCC_A1 (x(Ta) 2.200e-4) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C15 (x(Ta) 0.29579) |
| CoTa-14Shi.tdb | 887.37 | FCC_A1 (x(Ta) 2.200e-4) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C15 (x(Ta) 0.2958) |
| CoTa-14Shi.tdb | 887.37 | L12_FCC (x(Ta) 2.200e-4) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C15 (x(Ta) 0.2958) |
| CoTa-14Shi.tdb | 696.48 | FCC_A1 (x(Ta) 1.000e-5) + HCP_A3 (x(Ta) 1.700e-4) + CO2TA_C15 (x(Ta) 0.31787) |
| CoTa-14Shi.tdb | 696.48 | FCC_A1 (x(Ta) 1.000e-5) + HCP_A3 (x(Ta) 1.700e-4) + CO2TA_C15 (x(Ta) 0.31787) |
| CoTa-14Shi.tdb | 696.48 | L12_FCC (x(Ta) 1.000e-5) + HCP_A3 (x(Ta) 1.700e-4) + CO2TA_C15 (x(Ta) 0.31787) |
| CoTa-14Shi.tdb | 322.61 | MU_D85 (x(Ta) 0.48912) + COTA2_C16 (x(Ta) 0.66667) + BCC_A2 (x(Ta) 0.99997) |
| CoTa-14Shi.tdb | 322.61 | MU_D85 (x(Ta) 0.48912) + COTA2_C16 (x(Ta) 0.66667) + BCC_A2 (x(Ta) 0.99997) |
| CoTa-19Wan.tdb | 2011.03 | LIQUID (x(Ta) 0.63448) + COTA2_C16 (x(Ta) 0.66853) + BCC_A2 (x(Ta) 0.90389) |
| CoTa-19Wan.tdb | 1899.15 | MU_D85 (x(Ta) 0.53752) + LIQUID (x(Ta) 0.56453) + COTA2_C16 (x(Ta) 0.63275) |
| CoTa-19Wan.tdb | 1864.11 | CO2TA_C15 (x(Ta) 0.3451) + CO2TA_C14 (x(Ta) 0.36931) + LIQUID (x(Ta) 0.39304) |
| CoTa-19Wan.tdb | 1857.33 | CO2TA_C14 (x(Ta) 0.37341) + LIQUID (x(Ta) 0.40239) + MU_D85 (x(Ta) 0.44838) |
| CoTa-19Wan.tdb | 1724.31 | LIQUID (x(Ta) 0.18347) + CO2TA_C36 (x(Ta) 0.2551) + CO2TA_C15 (x(Ta) 0.28796) |
| CoTa-19Wan.tdb | 1594.38 | FCC_A1 (x(Ta) 0.05936) + LIQUID (x(Ta) 0.12596) + CO2TA_C36 (x(Ta) 0.23653) |
| CoTa-19Wan.tdb | 1594.38 | FCC_4SL (x(Ta) 0.05936) + LIQUID (x(Ta) 0.12596) + CO2TA_C36 (x(Ta) 0.23653) |
| CoTa-19Wan.tdb | 1538.23 | CO2TA_C15 (x(Ta) 0.33772) + CO2TA_C14 (x(Ta) 0.36046) + MU_D85 (x(Ta) 0.46155) |
| CoTa-19Wan.tdb | 1291.22 | FCC_4SL (x(Ta) 0.0227) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.23418) |
| CoTa-19Wan.tdb | 1291.22 | FCC_A1 (x(Ta) 0.0227) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.23418) |
| CoTa-19Wan.tdb | 1269.5 | CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.24351) + CO2TA_C15 (x(Ta) 0.26658) |
| CoTa-19Wan.tdb | 694.81 | HCP_A3 (x(Ta) 3.000e-5) + FCC_4SL (x(Ta) 4.000e-5) + CO7TA2 (x(Ta) 0.22222) |
| CoTa-19Wan.tdb | 694.81 | HCP_A3 (x(Ta) 3.000e-5) + FCC_A1 (x(Ta) 4.000e-5) + CO7TA2 (x(Ta) 0.22222) |
| CoTa-19Zho.tdb | 2073.02 | LIQUID (x(Ta) 0.65239) + COTA2_C16 (x(Ta) 0.66394) + BCC_A2 (x(Ta) 0.90543) |
| CoTa-19Zho.tdb | 1946.57 | MU_D85 (x(Ta) 0.52924) + LIQUID (x(Ta) 0.55217) + COTA2_C16 (x(Ta) 0.6319) |
| CoTa-19Zho.tdb | 1832.76 | CO2TA_C15 (x(Ta) 0.3306) + CO2TA_C14 (x(Ta) 0.36083) + LIQUID (x(Ta) 0.37598) |
| CoTa-19Zho.tdb | 1808.29 | CO2TA_C14 (x(Ta) 0.37265) + LIQUID (x(Ta) 0.40206) + MU_D85 (x(Ta) 0.46511) |
| CoTa-19Zho.tdb | 1720.59 | LIQUID (x(Ta) 0.18171) + CO2TA_C36 (x(Ta) 0.25715) + CO2TA_C15 (x(Ta) 0.267) |
| CoTa-19Zho.tdb | 1583.99 | FCC_A1 (x(Ta) 0.05061) + LIQUID (x(Ta) 0.13458) + CO2TA_C36 (x(Ta) 0.24281) |
| CoTa-19Zho.tdb | 1583.99 | FCC_4SL (x(Ta) 0.05061) + LIQUID (x(Ta) 0.13458) + CO2TA_C36 (x(Ta) 0.24281) |
| CoTa-19Zho.tdb | 1567.66 | CO2TA_C15 (x(Ta) 0.33695) + CO2TA_C14 (x(Ta) 0.3629) + MU_D85 (x(Ta) 0.46642) |
| CoTa-19Zho.tdb | 1320.39 | FCC_A1 (x(Ta) 0.03176) + CO3TA (x(Ta) 0.2363) + CO2TA_C36 (x(Ta) 0.24658) |
| CoTa-19Zho.tdb | 1320.39 | FCC_4SL (x(Ta) 0.03176) + CO3TA (x(Ta) 0.2363) + CO2TA_C36 (x(Ta) 0.24658) |
| CoTa-19Zho.tdb | 1303.59 | CO3TA (x(Ta) 0.24196) + CO2TA_C36 (x(Ta) 0.25433) + CO2TA_C15 (x(Ta) 0.26516) |
| CoTa-19Zho.tdb | 694.99 | HCP_A3 (x(Ta) 0) + FCC_4SL (x(Ta) 0) + FCC_A1 (x(Ta) 0) |
| CoTa-19Zho.tdb | 691.7 | HCP_A3 (x(Ta) 4.000e-5) + FCC_4SL (x(Ta) 3.900e-4) + CO3TA (x(Ta) 0.24984) |
| CoTa-19Zho.tdb | 691.7 | HCP_A3 (x(Ta) 4.000e-5) + FCC_A1 (x(Ta) 3.900e-4) + CO3TA (x(Ta) 0.24984) |
| CoTa-22Wan.tdb | 2076.13 | LIQUID (x(Ta) 0.66129) + COTA2_C16 (x(Ta) 0.666) + BCC_A2 (x(Ta) 0.94211) |
| CoTa-22Wan.tdb | 1895.69 | MU_D85 (x(Ta) 0.53964) + LIQUID (x(Ta) 0.58797) + COTA2_C16 (x(Ta) 0.62586) |
| CoTa-22Wan.tdb | 1853.78 | CO2TA_C15 (x(Ta) 0.33693) + CO2TA_C14 (x(Ta) 0.35991) + LIQUID (x(Ta) 0.39264) |
| CoTa-22Wan.tdb | 1827.67 | CO2TA_C14 (x(Ta) 0.37039) + LIQUID (x(Ta) 0.41304) + MU_D85 (x(Ta) 0.46265) |
| CoTa-22Wan.tdb | 1720.45 | LIQUID (x(Ta) 0.18603) + CO2TA_C36 (x(Ta) 0.26957) + CO2TA_C15 (x(Ta) 0.27208) |
| CoTa-22Wan.tdb | 1592.32 | FCC_A1 (x(Ta) 0.05907) + LIQUID (x(Ta) 0.13241) + CO2TA_C36 (x(Ta) 0.2266) |
| CoTa-22Wan.tdb | 1566.23 | CO2TA_C15 (x(Ta) 0.33793) + CO2TA_C14 (x(Ta) 0.36307) + MU_D85 (x(Ta) 0.46428) |
| CoTa-22Wan.tdb | 1316.43 | FCC_A1 (x(Ta) 0.01649) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.22904) |
| CoTa-22Wan.tdb | 1316.43 | FCC_A1 (x(Ta) 0.01656) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.22903) |
| CoTa-22Wan.tdb | 1222.1 | CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.25114) + CO2TA_C15 (x(Ta) 0.25891) |
| CoTa-22Wan.tdb | 1222.1 | CO7TA2 (x(Ta) 0.22222) + CO2TA_C36 (x(Ta) 0.25115) + CO2TA_C15 (x(Ta) 0.25891) |
| CoTa-22Wan.tdb | 903.8 | FCC_A1 (x(Ta) 2.600e-4) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C15 (x(Ta) 0.28904) |
| CoTa-22Wan.tdb | 903.8 | FCC_A1 (x(Ta) 2.600e-4) + CO7TA2 (x(Ta) 0.22222) + CO2TA_C15 (x(Ta) 0.28908) |
| CoTa-22Wan.tdb | 696.46 | FCC_A1 (x(Ta) 1.000e-5) + HCP_A3 (x(Ta) 1.700e-4) + CO2TA_C15 (x(Ta) 0.31609) |
| CoTa-22Wan.tdb | 696.46 | FCC_A1 (x(Ta) 1.000e-5) + HCP_A3 (x(Ta) 1.700e-4) + CO2TA_C15 (x(Ta) 0.31609) |
| CoTa-22Wan.tdb | 604.61 | MU_D85 (x(Ta) 0.49508) + COTA2_C16 (x(Ta) 0.66673) + BCC_A2 (x(Ta) 0.9986) |
| CoTa-99Liu-LB.tdb | 2072.99 | LIQUID (x(Ta) 0.65044) + COTA2_C16 (x(Ta) 0.66667) + BCC_A2 (x(Ta) 0.86165) |
| CoTa-99Liu-LB.tdb | 2072.99 | LIQUID (x(Ta) 0.65047) + COTA2_C16 (x(Ta) 0.66667) + BCC_A2 (x(Ta) 0.86166) |
| CoTa-99Liu-LB.tdb | 1944.92 | MU_D85 (x(Ta) 0.55674) + LIQUID (x(Ta) 0.57452) + COTA2_C16 (x(Ta) 0.66667) |
| CoTa-99Liu-LB.tdb | 1944.92 | MU_D85 (x(Ta) 0.55701) + LIQUID (x(Ta) 0.57481) + COTA2_C16 (x(Ta) 0.66667) |
| CoTa-99Liu-LB.tdb | 1845.24 | C15_LAVES (x(Ta) 0.33731) + LIQUID (x(Ta) 0.38266) + MU_D85 (x(Ta) 0.46497) |
| CoTa-99Liu-LB.tdb | 1810.83 | C15_LAVES (x(Ta) 0.33657) + C14_LAVES (x(Ta) 0.36323) + MU_D85 (x(Ta) 0.46465) |
| CoTa-99Liu-LB.tdb | 1727.19 | LIQUID (x(Ta) 0.21012) + C36_LAVES (x(Ta) 0.26966) + C15_LAVES (x(Ta) 0.28736) |
| CoTa-99Liu-LB.tdb | 1553.76 | FCC_A1 (x(Ta) 0.05048) + LIQUID (x(Ta) 0.13704) + C36_LAVES (x(Ta) 0.24928) |
| CoTa-99Liu-LB.tdb | 1403.36 | C15_LAVES (x(Ta) 0.33255) + C14_LAVES (x(Ta) 0.36191) + MU_D85 (x(Ta) 0.46221) |
| CoTa-99Liu-LB.tdb | 1229.44 | FCC_A1 (x(Ta) 0.02907) + CO7TA2 (x(Ta) 0.22222) + C36_LAVES (x(Ta) 0.24578) |
| CoTa-99Liu-LB.tdb | 1229.44 | FCC_A1 (x(Ta) 0.02907) + CO7TA2 (x(Ta) 0.22222) + C36_LAVES (x(Ta) 0.24578) |
| CoTa-99Liu-LB.tdb | 695.74 | FCC_A1 (x(Ta) 0.01214) + HCP_A3 (x(Ta) 0.01216) + CO7TA2 (x(Ta) 0.22222) |
| CoTa-99Liu-LB.tdb | 695.74 | FCC_A1 (x(Ta) 0.01208) + HCP_A3 (x(Ta) 0.0121) + CO7TA2 (x(Ta) 0.22222) |
Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CoTa-02Har · CALPHAD hull CoTa-14Shi · CALPHAD hull CoTa-19Zho · CALPHAD hull CoTa-99Liu-LB
Invariant reactions (literature)
| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|
| 2226.15 | peritectic: L + bcc ↔ CoTa2 | L: Ta 0.663; bcc: Ta 0.933; CoTa2: Ta 0.687 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 4 report | |
| 2086.15 | eutectic: Liquid ↔ λ1-Co2Ta + μ-Co6Ta7 | model | [1] Wang 2022 | p. 15 report | In the Al-Co-Ta ternary system, the eutectic reaction of Liquid ↔ λ1-Co2Ta + μ-Co6Ta7 occurs at 1813 °C, which is higher than the reaction temperature in the Co-Ta binary system. | |
| 2073.15 | peritectic: L + bcc ↔ CoTa2 | L: Ta 0.656; bcc: Ta 0.943; CoTa2: Ta 0.664 | model | [1] Wang 2022 | Table 2, p. 9, row 5 report | |
| 2073.15 | peritectic: L + bcc ↔ CoTa2 | L: Ta 0.652; bcc: Ta 0.905; CoTa2: Ta 0.664 | model | [1] Wang 2022 cites Zhou 2019 doi | Table 2, p. 9, row 3 report | |
| 2073.15 | peritectic: L + bcc ↔ CoTa2 | CoTa2: Ta 0.666667 | experimental | [1] Wang 2022 cites Bernard 1976 | Table 2, p. 9, row 1 report | |
| 2073 | liquid+bcc=CoTa2 | CoTa2: Ta 0.666667 | experimental | [2] Liu 1999 cites ref. 12 | Table 4, p. 8, row 1 report | |
| 2073 | liquid+bcc=CoTa2 | liquid: Ta 0.65; bcc: Ta 0.862; CoTa2: Ta 0.667 | model | [2] Liu 1999 | Table 4, p. 8, row 2 report | |
| 2060.15 | peritectic: L + bcc ↔ CoTa2 | L: Ta 0.643; bcc: Ta 0.912; CoTa2: Ta 0.661 | unspecified | [1] Wang 2022 cites Wang 2019 | Table 2, p. 9, row 2 report | |
| 1958.15 | eutectic: L ↔ μ + CoTa2 | L: Ta 0.58; μ: Ta 0.534; CoTa2: Ta 0.623 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 9 report | |
| 1945 | liquid=μ+ CoTa2 | liquid: Ta 0.574; μ: Ta 0.556; CoTa2: Ta 0.667 | model | [2] Liu 1999 | Table 4, p. 8, row 7 report | |
| 1943.15 | eutectic: L ↔ μ + CoTa2 | CoTa2: Ta 0.666667 | experimental | [1] Wang 2022 cites Bernard 1976 | Table 2, p. 9, row 6 report | |
| 1943.15 | eutectic: L ↔ μ + CoTa2 | L: Ta 0.551; μ: Ta 0.528; CoTa2: Ta 0.631 | model | [1] Wang 2022 cites Zhou 2019 doi | Table 2, p. 9, row 8 report | |
| 1943 | liquid=μ+ CoTa2 | CoTa2: Ta 0.666667 | experimental | [2] Liu 1999 cites ref. 12 | Table 4, p. 8, row 6 report | |
| 1896.15 | eutectic: L ↔ μ + CoTa2 | L: Ta 0.588; μ: Ta 0.54; CoTa2: Ta 0.626 | model | [1] Wang 2022 | Table 2, p. 9, row 10 report | |
| 1893.15 | eutectic: L ↔ μ + CoTa2 | L: Ta 0.572; μ: Ta 0.541; CoTa2: Ta 0.65 | unspecified | [1] Wang 2022 cites Wang 2019 | Table 2, p. 9, row 7 report | |
| 1863.15 | peritectic: L + λ2 ↔ λ1 | L: Ta 0.393; λ2: Ta 0.345; λ1: Ta 0.369 | unspecified | [1] Wang 2022 cites Wang 2019 | Table 2, p. 9, row 13 report | |
| 1860.15 | peritectic: L + λ2 ↔ λ1 | L: Ta 0.401; λ2: Ta 0.341; λ1: Ta 0.36 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 15 report | |
| 1854.15 | peritectic: L + λ2 ↔ λ1 | L: Ta 0.393; λ2: Ta 0.337; λ1: Ta 0.36 | model | [1] Wang 2022 | Table 2, p. 9, row 16 report | |
| 1845 | liquid=C15+μ | liquid: Ta 0.382; C15: Ta 0.333; μ: Ta 0.465 | model | [2] Liu 1999 | Table 4, p. 8, row 11 report | |
| 1843.15 | peritectic: L + λ2 ↔ λ1 | L: Ta 0.333; λ2: Ta 0.333; λ1: Ta 0.333333 | experimental | [1] Wang 2022 cites Petkov 1972 | Table 2, p. 9, row 11 report | |
| 1843.15 | peritectic: L + λ2 ↔ λ1 | λ2: Ta 0.333333; λ1: Ta 0.333333 | experimental | [1] Wang 2022 cites Bernard 1976 | Table 2, p. 9, row 12 report | |
| 1843 | liquid=C15+μ | experimental | [2] Liu 1999 cites ref. 12 | Table 4, p. 8, row 12 report | ||
| 1833.15 | peritectic: L + λ2 ↔ λ1 | L: Ta 0.375; λ2: Ta 0.329; λ1: Ta 0.362 | model | [1] Wang 2022 cites Zhou 2019 doi | Table 2, p. 9, row 14 report | |
| 1833 | liquid=C15+μ | experimental | [2] Liu 1999 cites ref. 19 | Table 4, p. 8, row 10 report | ||
| 1830.15 | eutectic: L ↔ λ1 + μ | L: Ta 0.42; λ1: Ta 0.368; μ: Ta 0.458 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 19 report | |
| 1828.15 | eutectic: L ↔ λ1 + μ | L: Ta 0.413; λ1: Ta 0.37; μ: Ta 0.463 | model | [1] Wang 2022 | Table 2, p. 9, row 20 report | |
| 1823.15 | eutectic: L ↔ λ1 + μ | λ1: Ta 0.333333 | experimental | [1] Wang 2022 cites Petkov 1972 | Table 2, p. 9, row 17 report | |
| 1813 | C15+μ=C14 | experimental | [2] Liu 1999 cites ref. 19 | Table 4, p. 8, row 13 report | ||
| 1812 | C15+μ=C14 | C15: Ta 0.333; μ: Ta 0.465; C14: Ta 0.371 | model | [2] Liu 1999 | Table 4, p. 8, row 14 report | |
| 1808.15 | eutectic: L ↔ λ1 + μ | L: Ta 0.402; λ1: Ta 0.373; μ: Ta 0.465 | model | [1] Wang 2022 cites Zhou 2019 doi | Table 2, p. 9, row 18 report | |
| 1729.15 | peritectic: L + λ2 ↔ λ3 | L: Ta 0.187; λ2: Ta 0.279; λ3: Ta 0.275 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 25 report | |
| 1723.15 | peritectic: L + λ2 ↔ λ3 | λ2: Ta 0.333333; λ3: Ta 0.333333 | experimental | [1] Wang 2022 cites Petkov 1972 | Table 2, p. 9, row 21 report | |
| 1723 | liquid+C15=C36 | experimental | [2] Liu 1999 cites ref. 19 | Table 4, p. 8, row 15 report | ||
| 1721.15 | peritectic: L + λ2 ↔ λ3 | L: Ta 0.182; λ2: Ta 0.267; λ3: Ta 0.257 | model | [1] Wang 2022 cites Zhou 2019 doi | Table 2, p. 9, row 24 report | |
| 1721.15 | peritectic: L + λ2 ↔ λ3 | L: Ta 0.205; λ2: Ta 0.287; λ3: Ta 0.271 | model | [1] Wang 2022 cites Liu 1999 doi | Table 2, p. 9, row 22 report | |
| 1721.15 | peritectic: L + λ2 ↔ λ3 | L: Ta 0.182; λ2: Ta 0.287; λ3: Ta 0.254 | unspecified | [1] Wang 2022 cites Wang 2019 | Table 2, p. 9, row 23 report | |
| 1721 | liquid+C15=C36 | liquid: Ta 0.205; C15: Ta 0.271; C36: Ta 0.287 | model | [2] Liu 1999 | Table 4, p. 8, row 16 report | |
| 1720.15 | peritectic: L + λ2 ↔ λ3 | L: Ta 0.186; λ2: Ta 0.272; λ3: Ta 0.269 | model | [1] Wang 2022 | Table 2, p. 9, row 26 report | |
| 1594.15 | eutectic: L ↔ fcc + λ3 | L: Ta 0.126; fcc: Ta 0.059; λ3: Ta 0.237 | unspecified | [1] Wang 2022 cites Wang 2019 | Table 2, p. 9, row 29 report | |
| 1593.15 | eutectic: L ↔ fcc + λ3 | L: Ta 0.132; fcc: Ta 0.059; λ3: Ta 0.227 | model | [1] Wang 2022 | Table 2, p. 9, row 32 report | |
| 1588.15 | eutectic: L ↔ fcc + λ3 | L: Ta 0.134; fcc: Ta 0.061; λ3: Ta 0.237 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 31 report | |
| 1584.15 | eutectic: L ↔ fcc + λ3 | L: Ta 0.134; fcc: Ta 0.051; λ3: Ta 0.242 | model | [1] Wang 2022 cites Zhou 2019 doi | Table 2, p. 9, row 30 report | |
| 1570.15 | eutectoid: λ1 ↔ μ + λ2 | λ1: Ta 0.351; μ: Ta 0.468; λ2: Ta 0.332 | unspecified | [1] Wang 2022 cites Wang 2019 | Table 2, p. 9, row 34 report | |
| 1567.15 | eutectoid: λ1 ↔ μ + λ2 | λ1: Ta 0.362; μ: Ta 0.466; λ2: Ta 0.337 | model | [1] Wang 2022 cites Zhou 2019 doi | Table 2, p. 9, row 35 report | |
| 1567.15 | eutectoid: λ1 ↔ μ + λ2 | λ1: Ta 0.363; μ: Ta 0.464; λ2: Ta 0.338 | model | [1] Wang 2022 | Table 2, p. 9, row 37 report | |
| 1566.15 | eutectoid: λ1 ↔ μ + λ2 | λ1: Ta 0.366; μ: Ta 0.461; λ2: Ta 0.342 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 36 report | |
| 1563.15 | eutectic: L ↔ fcc + λ3 | λ3: Ta 0.333333 | experimental | [1] Wang 2022 cites Petkov 1972 | Table 2, p. 9, row 27 report | |
| 1553.15 | eutectic: L ↔ fcc + λ3 | L: Ta 0.137; fcc: Ta 0.051; λ3: Ta 0.252 | model | [1] Wang 2022 cites Liu 1999 doi | Table 2, p. 9, row 28 report | |
| 1553 | liquid=fcc+C36 | experimental | [2] Liu 1999 cites ref. 19 | Table 4, p. 8, row 19 report | ||
| 1553 | liquid=fcc+C36 | liquid: Ta 0.137; fcc: Ta 0.051; C36: Ta 0.252 | model | [2] Liu 1999 | Table 4, p. 8, row 18 report | |
| 1551 | liquid=fcc+C36 | liquid: Ta 0.138 | experimental | [2] Liu 1999 cites ref. 16 | Table 4, p. 8, row 17 report | |
| 1405 | C14=C15+μ | C14: Ta 0.367; C15: Ta 0.332; μ: Ta 0.462 | model | [2] Liu 1999 | Table 4, p. 8, row 21 report | |
| 1403.15 | eutectoid: λ1 ↔ μ + λ2 | λ1: Ta 0.333333; λ2: Ta 0.333333 | experimental | [1] Wang 2022 cites Petkov 1972 | Table 2, p. 9, row 33 report | |
| 1403 | C14=C15+μ | experimental | [2] Liu 1999 cites ref. 19 | Table 4, p. 8, row 20 report | ||
| 1336.15 | peritectoid: fcc + λ3 ↔ Co7Ta2 | fcc: Ta 0.025; λ3: Ta 0.241; Co7Ta2: Ta 0.222 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 40 report | |
| 1320.15 | peritectoid: fcc + λ3 ↔ Co7Ta2 | fcc: Ta 0.032; λ3: Ta 0.246; Co7Ta2: Ta 0.236 | model | [1] Wang 2022 cites Zhou 2019 doi | Table 2, p. 9, row 39 report | |
| 1313.15 | peritectoid: fcc + λ3 ↔ Co7Ta2 | fcc: Ta 0.016; λ3: Ta 0.23; Co7Ta2: Ta 0.222 | model | [1] Wang 2022 | Table 2, p. 9, row 41 report | |
| 1306.15 | peritectoid | experimental | [3] Shinagawa 2014 | p. 1 report | The solvus temperature of the g0 Co3Ta (L12) phase precipitated in the 5.8 at.%Ta g(Co) and the peritectoid temperature of the Co7Ta2 phase in an 8.5 at.%Ta alloy were determined to be 1013 C and 1033 C, respectively, by differential scanning calorimeter (DSC). | |
| 1303.15 | eutectoid: λ3 ↔ Co7Ta2 + λ2 | λ3: Ta 0.254; Co7Ta2: Ta 0.242; λ2: Ta 0.265 | model | [1] Wang 2022 cites Zhou 2019 doi | Table 2, p. 9, row 43 report | |
| 1291.15 | peritectoid: fcc + λ3 ↔ Co7Ta2 | fcc: Ta 0.0227; λ3: Ta 0.234; Co7Ta2: Ta 0.222 | unspecified | [1] Wang 2022 cites Wang 2019 | Table 2, p. 9, row 38 report | |
| 1281 | fcc+C36= Co7Ta2 | Co7Ta2: Ta 0.222222 | experimental | [2] Liu 1999 cites ref. 16 | Table 4, p. 8, row 24 report | |
| 1272.15 | eutectoid: λ3 ↔ Co7Ta2 + λ2 | λ3: Ta 0.243; Co7Ta2: Ta 0.222; λ2: Ta 0.266 | unspecified | [1] Wang 2022 cites Wang 2019 | Table 2, p. 9, row 42 report | |
| 1263 | fcc+C36= Co7Ta2 | fcc: Ta 0.013; Co7Ta2: Ta 0.222222 | experimental | [2] Liu 1999 cites ref. 10 | Table 4, p. 8, row 22 report | |
| 1231.15 | eutectoid: λ3 ↔ Co7Ta2 + λ2 | λ3: Ta 0.259; Co7Ta2: Ta 0.222; λ2: Ta 0.265 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 44 report | |
| 1223 | fcc+C36= Co7Ta2 | Co7Ta2: Ta 0.222222 | experimental | [2] Liu 1999 cites ref. 19 | Table 4, p. 8, row 25 report | |
| 1222 | fcc+C36= Co7Ta2 | fcc: Ta 0.029; C36: Ta 0.249; Co7Ta2: Ta 0.222 | model | [2] Liu 1999 | Table 4, p. 8, row 23 report | |
| 1220.15 | eutectoid: λ3 ↔ Co7Ta2 + λ2 | λ3: Ta 0.251; Co7Ta2: Ta 0.222; λ2: Ta 0.259 | model | [1] Wang 2022 | Table 2, p. 9, row 45 report | |
| 904.15 | eutectoid: Co7Ta2 ↔ λ2 + fcc | Co7Ta2: Ta 0.222; λ2: Ta 0.289; fcc: Ta 3.000e-4 | model | [1] Wang 2022 | Table 2, p. 9, row 47 report | |
| 889.15 | eutectoid: Co7Ta2 ↔ λ2 + fcc | Co7Ta2: Ta 0.222; λ2: Ta 0.296; fcc: Ta 9.000e-4 | experimental | [1] Wang 2022 cites Shinagawa 2014 doi | Table 2, p. 9, row 46 report | |
| 696 | fcc=hcp+Co7Ta2 | fcc: Ta 0.01208; hcp: Ta 0.01209; Co7Ta2: Ta 0.222 | model | [2] Liu 1999 | Table 4, p. 8, row 26 report |
Formation enthalpies
Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.
| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|---|
| A15 | -8.6283 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 3 report | ||||
| A15 | -4.9718 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 2 report | ||||
| A15 | 9.2351 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 1 report | ||||
| BCC | -9.0231 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 4 report | ||||
| BCC | 1.3464 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 2 report | ||||
| BCC | 1.4485 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 5 report | ||||
| BCC | 7.4552 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 3 report | ||||
| BCC | 9.5225 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 1 report | ||||
| C14 | -20.866 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 11 report | ||||
| C14 | -20.5623 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 9 report | ||||
| C14 | 1.2747 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 10 report | ||||
| C14 | 14.697 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 7 report | ||||
| C14 | 16.3511 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 5 report | ||||
| C14 | 44.7442 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 6 report | ||||
| C14 | 77.3168 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 8 report | ||||
| C15 | -20.9424 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 14 report | ||||
| C15 | 19.2335 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 13 report | ||||
| C15 | 72.2759 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 15 report | ||||
| C16 | -24.1586 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 18 report | ||||
| C16 | 24.3042 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 19 report | ||||
| C16 | 49.0982 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 17 report | ||||
| C36 | 17.483 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 21 report | ||||
| C36 | 43.6063 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 24 report | ||||
| C36 | 44.9621 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 23 report | ||||
| C36 | 49.265 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 2, p. 22, row 22 report | ||||
| FCC | -21.9842 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 7 report | ||||
| FCC | -11.5118 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 8 report | ||||
| FCC | 1.7185 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 6 report | ||||
| FCC | 15.4676 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 9 report | ||||
| HCP | -21.5815 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 12 report | ||||
| HCP | 0 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 11 report | ||||
| HCP | 17.1227 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 13 report | ||||
| HCP | 18.2796 kJ/mol (basis unstated) | 0 | DFT | [4] Wang 2019 | Table 3, p. 27, row 14 report |
Other properties
Phase transition (24)
| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|---|
| Phase transition | 1217.85 K | 1217.85 | γ + γ' Co3Ta ⇒ γ alloy: Co 0.965, Ta 0.035 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 6 report | |
| Phase transition | 1250.95 K | 1250.95 | magnetic: Co–3.5Ta alloy: Co 0.965, Ta 0.035 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 7 report | |
| Phase transition | 1251.15 K | 1251.15 | magnetic | experimental | [3] Shinagawa 2014 | p. 8 report | In addition, a small endothermic knickpoint appeared at 978 C in 3.5at.%Ta alloy, which caused by the g magnetic transition (Curie temperature, TC ). |
| Phase transition | 1286.15 K | 1286.15 | other | experimental | [3] Shinagawa 2014 | p. 1 report | The solvus temperature of the g0 Co3Ta (L12) phase precipitated in the 5.8 at.%Ta g(Co) and the peritectoid temperature of the Co7Ta2 phase in an 8.5 at.%Ta alloy were determined to be 1013 C and 1033 C, respectively, by differential scanning calorimeter (DSC). |
| Phase transition | 1286.15 K | 1286.15 | γ + γ' Co3Ta ⇒ γ alloy: Co 0.915, Ta 0.085 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 11 report | |
| Phase transition | 1306.15 K | 1306.15 | γ + λ3 ⇒ χ Co7Ta2 alloy: Co 0.915, Ta 0.085 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 10 report | |
| Phase transition | 1310.85 K | 1310.85 | magnetic: Co–2Ta alloy: Ta 0 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 3 report | |
| Phase transition | 1578.15 K | 1578.15 | eutectic: L ⇒ γ(Co) + λ3 alloy: Co 0.88, Ta 0.12 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 13 report | |
| Phase transition | 1578.75 K | 1578.75 | eutectic: Co–8.5Ta alloy: Co 0.942, Ta 0.058 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 9 report | |
| Phase transition | 1582.15 K | 1582.15 | eutectic: L ⇒ γ(Co) + λ3 alloy: Co 0.76, Ta 0.24 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 19 report | |
| Phase transition | 1584.05 K | 1584.05 | eutectic: L ⇒ γ(Co) + λ3 alloy: Co 0.79, Ta 0.21 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 17 report | |
| Phase transition | 1584.95 K | 1584.95 | eutectic: L ⇒ γ(Co) + λ3 alloy: Co 0.86, Ta 0.14 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 14 report | |
| Phase transition | 1587.15 K | 1587.15 | eutectic: L ⇒ γ(Co) + λ3 alloy: Co 0.84, Ta 0.16 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 15 report | |
| Phase transition | 1587.15 K | 1587.15 | eutectic: L ⇒ γ(Co) + λ3 alloy: Co 0.82, Ta 0.18 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 16 report | |
| Phase transition | 1701.65 K | 1701.65 | other: Co–3.5Ta alloy: Co 0.965, Ta 0.035 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 5 report | |
| Phase transition | 1720.35 K | 1720.35 | peritectic: L + λ2(C15) ⇒ λ3(C36) alloy: Co 0.76, Ta 0.24 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 20 report | |
| Phase transition | 1722.05 K | 1722.05 | peritectic: L + λ2(C15) ⇒ λ3(C36) alloy: Co 0.79, Ta 0.21 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 18 report | |
| Phase transition | 1735.65 K | 1735.65 | other: Co–2Ta alloy: Ta 0 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 2 report | |
| Phase transition | 1888 K | 1888 | liquid=C15 liquid: Ta 0.328; C15: Ta 0.328 | model | [2] Liu 1999 | Table 4, p. 8, row 9 report | |
| Phase transition | 1893 K | 1893 | liquid=C15 liquid: Ta 0.33; C15: Ta 0.33 | experimental | [2] Liu 1999 cites ref. 19 | Table 4, p. 8, row 8 report | |
| Phase transition | 1923 K | 1923 | liquid=μ liquid: Ta 0.5; μ: Ta 0.5 | experimental | [2] Liu 1999 cites ref. 19 | Table 4, p. 8, row 3 report | |
| Phase transition | 1972 K | 1972 | liquid=μ liquid: Ta 0.499; μ: Ta 0.499 | model | [2] Liu 1999 | Table 4, p. 8, row 4 report | |
| Phase transition | 1973 K | 1973 | liquid=μ liquid: Ta 0.5; μ: Ta 0.5 | experimental | [2] Liu 1999 cites ref. 12 | Table 4, p. 8, row 5 report | |
| Phase transition | 2273.15 K | 2273.15 | other | model | [3] Shinagawa 2014 | p. 1 report | Analyzing the present experimental results synthetically, the g0 Co3Ta phase was identified to be a metastable phase, of which the g/g0 transition temperature of the stoichiometric Co3Ta alloy was estimated to be 2000 C. |
Phase equilibrium (24)
| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|---|
| Phase composition | 1173.15 | γ (Co) + χ (Co7Ta2) γ (Co): Co 0.993, Ta 0.007; χ (Co7Ta2): Co 0.766, Ta 0.234 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 1 report | ||
| Phase composition | 1173.15 | γ + χ + λ3 γ: Co 0.989, Ta 0.011; χ: Co 0.762, Ta 0.238; λ3: Co 0.732, Ta 0.268 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 16 report | ||
| Phase composition | 1273.15 | γ + χ γ: Co 0.985, Ta 0.015; χ: Co 0.771, Ta 0.229 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 2 report | ||
| Phase composition | 1273.15 | γ + χ + λ3 + λ2 + μ + CoTa2 + α (Ta) γ: Co 0.987, Ta 0.013; χ: Co 0.766, Ta 0.234; λ3: Co 0.749, Ta 0.251; λ2: Co 0.666, Ta 0.334; μ: Co 0.471, Ta 0.529; CoTa2: Co 0.331, Ta 0.669; α (Ta): Co 0.031, Ta 0.969 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 17 report | ||
| Phase composition | 1373.15 | γ + λ3 (C36) γ: Co 0.967, Ta 0.033; λ3 (C36): Co 0.762, Ta 0.238 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 3 report | ||
| Phase composition | 1373.15 | λ2 + μ + CoTa2 + α λ2: Co 0.665, Ta 0.335; μ: Co 0.47, Ta 0.53; CoTa2: Co 0.334, Ta 0.666; α: Co 0.026, Ta 0.974 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 18 report | ||
| Phase composition | 1473.15 | γ + λ3 γ: Co 0.954, Ta 0.046; λ3: Co 0.765, Ta 0.235 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 4 report | ||
| Phase composition | 1473.15 | λ2 + μ λ2: Co 0.664, Ta 0.336; μ: Co 0.54, Ta 0.46 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 8 report | ||
| Phase composition | 1473.15 | λ2 + μ + CoTa2 + α λ2: Co 0.663, Ta 0.337; μ: Co 0.47, Ta 0.53; CoTa2: Co 0.334, Ta 0.666; α: Co 0.026, Ta 0.974 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 19 report | ||
| Phase composition | 1523.15 | λ2 + μ λ2: Co 0.668, Ta 0.332; μ: Co 0.54, Ta 0.46 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 9 report | ||
| Phase composition | 1553.15 | λ2 + μ λ2: Co 0.664, Ta 0.336; μ: Co 0.539, Ta 0.461 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 10 report | ||
| Phase composition | 1563.15 | λ2 + μ λ2: Co 0.664, Ta 0.336; μ: Co 0.538, Ta 0.462 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 11 report | ||
| Phase composition | 1573.15 | γ + λ3 γ: Co 0.942, Ta 0.058; λ3: Co 0.768, Ta 0.232 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 5 report | ||
| Phase composition | 1573.15 | λ1 + μ λ1: Co 0.637, Ta 0.363; μ: Co 0.541, Ta 0.459 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 12 report | ||
| Phase composition | 1573.15 | λ2 + μ + CoTa2 + α λ2: Co 0.668, Ta 0.332; μ: Co 0.469, Ta 0.531; CoTa2: Co 0.326, Ta 0.674; α: Co 0.023, Ta 0.977 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 20 report | ||
| Phase composition | 1573.15 | μ + CoTa2 μ: Co 0.466, Ta 0.534; CoTa2: Co 0.356, Ta 0.644 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 15 report | ||
| Phase composition | 1623.15 | λ1 + μ λ1: Co 0.633, Ta 0.367; μ: Co 0.58, Ta 0.42 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 13 report | ||
| Phase composition | 1623.15 | λ2 (C15) + λ1 (C14) λ2 (C15): Co 0.66, Ta 0.34; λ1 (C14): Co 0.641, Ta 0.359 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 6 report | ||
| Phase composition | 1637.75 | other: Co–12Ta liquid: Co 0.88, Ta 0.12 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 12 report | ||
| Phase composition | 1673.15 | λ1 + μ λ1: Co 0.632, Ta 0.368; μ: Co 0.538, Ta 0.462 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 14 report | ||
| Phase composition | 1673.15 | λ2 + λ1 λ2: Co 0.664, Ta 0.336; λ1: Co 0.644, Ta 0.356 | experimental | [3] Shinagawa 2014 | Table 3, p. 6, row 7 report | ||
| Phase composition | 1702.45 | other: Co–8.5Ta liquid: Co 0.915, Ta 0.085 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 8 report | ||
| Phase composition | 1736.85 | other: Co–3.5Ta liquid: Co 0.965, Ta 0.035 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 4 report | ||
| Phase composition | 1754.25 | other: Co–2Ta liquid: Ta 0 | experimental | [3] Shinagawa 2014 | Table 2, p. 5, row 1 report |
Sources
Reporting papers the values were read from (a value cited from another work names that work in its row).
- Cuiping Wang, Xiaodong Chen, Peng Yang, Qianqian Zhang, Shuiyuan Yang, Yong Lu et al., Experimental investigation and thermodynamic assessment of phase equilibria in the Al-Co-Ta ternary system, Journal of Alloys and Compounds 925, 166723 (2022). doi:10.1016/j.jallcom.2022.166723
- Zi-Kui Liu, Y.Austin Chang, Thermodynamic assessment of the Co-Ta system, Calphad 23, 339-356 (1999). doi:10.1016/s0364-5916(00)00005-5
- Kazuya Shinagawa, Hibiki Chinen, Toshihiro Omori, Katsunari Oikawa, Ikuo Ohnuma, Kiyohito Ishida et al., Phase equilibria and thermodynamic calculation of the Co–Ta binary system, Intermetallics 49, 87-97 (2014). doi:10.1016/j.intermet.2014.01.015
- Peisheng Wang, Jörg Koßmann, Ursula R. Kattner, Mauro Palumbo, Thomas Hammerschmidt, Gregory B. Olson, Thermodynamic assessment of the Co-Ta system, Calphad 64, 205-212 (2019). doi:10.1016/j.calphad.2018.12.002