Low temperature study of phase equilibria in the Co-Ni-W ternary system: Evidence of a new intermetallic phase Co3W-D0a

被引：4

作者：

Bouliez, Nicolas ^{[1
,2
]}

Andrieux, Jerome ^{[2
]}

Chiriac, Rodica ^{[2
]}

Toche, Francois ^{[2
]}

Crivello, Jean-Claude ^{[3
]}

Gardiola, Bruno ^{[2
]}

Cazottes, Sophie ^{[4
]}

Robaut, Florence ^{[5
]}

Cury, Rafael ^{[1
]}

Dezellus, Olivier ^{[2
]}

机构：

[1] Plansee Tungsten Alloys, 446 Ave Digues, F-74807 St Pierre En Faucigny, France

[2] Univ Claude Bernard Lyon 1, Univ Lyon, UMR CNRS 5615, Lab Multimat & Interfaces, F-69622 Villeurbanne, France

[3] Univ Paris Est Creteil, CNRS, ICMPE, UMR7182, 2 Rue Henri Dunant, F-94320 Thiais, France

[4] Univ Lyon, INSA Lyon, MATEIS, Bat St Exupery,25 Ave Jean Capelle, F-69621 Villeurbanne, France

[5] Univ Grenoble Alpes, CNRS, Grenoble INP, SIMAP, F-38000 Grenoble, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 892卷

关键词：

Intermetallics; Powder metallurgy; Phase diagrams; Thermal analysis; X-ray diffraction; THERMODYNAMIC PROPERTIES;

D O I：

10.1016/j.jallcom.2021.162109

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Tungsten heavy alloys (Co-Ni-W) of different compositions were prepared by powder metallurgy (solid sintering), heat treated at 800 degrees C and 1000 degrees C and subsequently analyzed. The experimental phase identifications and composition measurements emphasized discrepancies compared to the isothermal ternary sections simulated with commercial thermodynamic databases. The isothermal sections at 800 degrees C and 1000 degrees C were found more complex than expected since a new intermetallic phase appeared to be stable (D0(a) structure-Cu3Ti prototype). Likewise, an interpretation of phase equilibria evolution with temperature was established to reach agreement with high temperature data. Formation enthalpies associated with the new phase were obtained through first-principles calculations and supported experimental results as they confirmed the stabilizing role of Ni addition for the D0(a) structure. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：10

共 33 条

[1] PROJECTOR AUGMENTED-WAVE METHOD [J].

BLOCHL, PE .

PHYSICAL REVIEW B, 1994, 50 (24) :17953-17979

[2] ZenGen, a tool to generate ordered configurations for systematic first-principles calculations: The Cr-Mo-Ni-Re system as a case study [J].

Crivello, J-C. ;

Souques, R. ;

Reidi, A. ;

Bourgeois, N. ;

Joubert, J-M. .

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2015, 51 :233-240

[3] On the existence and the crystal structure of Ni4W, NiW and NiW2 compounds [J].

Cury, R. ;

Joubert, J. -M. ;

Tusseau-Nenez, S. ;

Leroy, E. ;

Allavena-Valette, A. .

INTERMETALLICS, 2009, 17 (03) :174-178

[4]

Gabriel A., 1984, REMPLACEMENT COBALT

[5]

Guillermet A.F., 1988, THERMODYNAMIC CO NI

[6]

GUILLERMET AF, 1987, Z METALLKD, V78, P639

[7] THERMODYNAMIC PROPERTIES OF THE CO-W-C SYSTEM [J].

GUILLERMET, AF .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1989, 20 (05) :935-956

[8]

Gustafson P., 1986, MET, P639

[9] The effect of solid solution and gamma prime on the deformation modes in Ni-based superalloys [J].

Harte, Allan ;

Atkinson, Michael ;

Smith, Albert ;

Drouven, Carsten ;

Zaefferer, Stefan ;

da Fonseca, Joao Quinta ;

Preuss, Michael .

ACTA MATERIALIA, 2020, 194 :257-275

[10]

Hofmann H., 1983, KONSTITUTION W NI FE

← 1 2 3 4 →