Thermodynamic investigation of phase equilibria on the (W,Mo)C-(Co,Ni) cemented carbides |
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| Affiliation: | 1. Department of Materials Science and Engineering, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway;2. Department of Materials Science and Engineering, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden;3. WPI Advanced Institute for Materials Research, Tohoku University, 2-1-1,Katahira, Sendai 980-8577, Japan;1. UFSCar, São Carlos, Brazil;2. KTH, Stockholm, Sweden;3. EEIMVR-UFF, Volta Redonda, Brazil;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, China;2. Hunan Provincial Key Defense Laboratory of High Temperature Wear Resisting Materials and Preparation Technology, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, China;3. School of Metallurgical Engineering, Hunan University of Technology, Zhuzhou, Hunan, 412008, China;4. Key Laboratory of Powder Metallurgy in Advanced Manufacturing of Shandong Province, Laiwu Vocational and Technical College, Laiwu, Shandong, 271100, China |
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| Abstract: | The C-Co-Mo-W and C-Mo-Ni-W quaternary systems have been critically evaluated by means of the CALPHAD approach, in which the Co-Mo-W system was readjusted to ensure the model consistency. The thermodynamic models of Gibbs energies for individual phases in the ternary and quaternary systems are described, including substitutional solution model, sublattice model and linear compound model. The modeling covers the whole temperature and composition ranges, and a set of self-consistent thermodynamic parameters for the C-Co-Mo-W and C-Mo-Ni-W quaternary systems is obtained. According to the comprehensive comparisons between the reported and calculated phase diagram data, the reliable equilibria information is satisfactorily accounted for by the modeling. Based on the present work together with the previously reported assessments of binary, ternary and quaternary sub-systems, a thermodynamic database for the C-Co-Mo-Ni-W quinary system is constructed and applied to calculate the sintering region phase equilibria of the (W,Mo)C-(Co,Ni) cemented carbides. |
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| Keywords: | (W,Mo)C Cemented carbide CALPHAD Phase equilibria Database |
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