Thermodynamic Assessment of the Ni-Ga System
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摘要: 采用CALPHAD技術評估了Ni-Ga二元系的相圖和熱力學性質.用雙亞晶格模型描述2個有序相(L12-Ni3Ga和B2-NiGa)的熱力學行為,并在優化過程中考慮了fcc-(Ni)和L12Ni3Ga相的有序-無序轉變.溶液相(液相、fcc-(Ni)固溶體)的熱力學模型采用Redlich-Kister方程,其余5個中間化合物被視為整比化合物.Abstract: The Ni-Ga system was assessed using the CALPHAD technique. The thermodynamic behav-iour of the ordered phases (Li2-Ni3Ga and H2-NiGa) were described by the sub-lattice model, and the order-disorder transformation of fcc-(Ni) and Li2-Ni3Ga phase was considered in the assessment. The solution phases (liquid, fcc-Ni) were modeled with the Redlich-Kister equation. The other 5 intermetallic compounds were treated as stoichiometric phases.
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Key words:
- Ni-Ga system /
- phase diagram calculation /
- thermodynamics /
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