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However, as shown in the BSE micrograph and the XRD pattern (Figs. 3 (a) and (b), respectively), a two-phase equilibrium between the χ and bcc phases was found, which is contradictory to the data reported by Tsagaraeva et al. [28]. The average compositions of the χ and bcc phases were determined","quote_page":21,"reader_agreement":"multi_reader","reader_agreement_basis":"derived_from_readers","reader_agreement_label":"confirmed (two or more readers)","reader_tier":"preliminary_flash","readers":["claude-opus-5.5","gemini-3.8-flash"],"record_kind":"running_text","source_system":"MO-NB-RE","system":"MO-NB-RE","temperature_K":1973.0,"temperature_printed":"1973 K","tool_release":"release v2 + tools dev copy record build","uncertainty_budget":{"calibration":"orchid-uncertainty-calibration 2026-10-24 (audit round 2) sha256 6a2b5a92b0ec","quantities":{"temperature_K":{"sigma_composition":null,"sigma_conversion":null,"sigma_effective":5.0,"sigma_method":{"basis":"prior","ci95":null,"class":"microanalysis","entry":"value_types/T_CONDITION/classes/unknown","floor":5.0,"floor_unit":"K","n_pairs":0,"prior_source":"orchid_assumed","value":5.0},"sigma_printed":null,"sigma_reading":{"basis":"last_printed_digit","value":0.5},"sigma_scatter":null,"unit":"K","value_type":"T_CONDITION"}},"sigma_rule":"max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter)"}},{"chemical_system":"MO-NB-RE","conditions":{"kind":"paper_context","paper":"doi:10.1016/j.calphad.2020.101797"},"evidence_class":"experimental","flags":{"calphad_check":"not_available","dropped_field_count":1,"espei_certified":false,"espei_ready":false,"extraction_accepted":true,"has_dropped_fields":true,"quote_chars_original":819,"quote_clipped":true,"quote_original_sha256":"9682c5198c7654a3","review_state":"extracted","second_reader":"done","value_in_quote":true},"fold_lpo":0,"fold_lso":2,"id":"ORC-CJ4DNCBLZW.aedbbb","link_rule":"quote verbatim on one page/passage + printed value inside quote","locator":{"ref":"doi:10.1016/j.calphad.2020.101797/p21/text-01"},"observation_type":"phase_assemblage_node","origin":{"attribution_note":"no printed citation: the paper's own statement","class":"experimental","measured_in":"doi:10.1016/j.calphad.2020.101797","own_work_of_paper":true},"overall_composition":{"NB":0.172,"RE":0.516},"overall_composition_basis":"mole_fraction (printed basis: at)","paper":"doi:10.1016/j.calphad.2020.101797","paper_id":"doi:10.1016/j.calphad.2020.101797","phases":[{"label":"χ"},{"label":"bcc"}],"pid":"doi:10.1016/j.calphad.2020.101797/p21/text-01/s08#phase_assemblage_node","pressure_Pa":101325,"pressure_basis":"assumed_default_1_atm_not_printed","pressure_basis_stored":"stated_default_1_atm","property":"PHASE_ASSEMBLAGE","property_group":"phase equilibrium","quote":"As expected, the one at the highest annealing temperature (2373K) showed the best crystallinity and the most coarsened grain structure. Nevertheless, Similar to that at 1973K, the χ + bcc two-phase equilibrium was observed at both 2173 and 2373K. As summarized in Table V, the average composition of the χ phase does not change much among the three temperature, ranging from Mo-15.5 at.%Nb-63.9 at.%Re to Mo13.9 at.%Nb-63.1 at.%Re. 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On the other hand, the contents of the bcc phase show a clear trend between 1973 and 2373K. 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