期刊论文

Wang Jiang

英文

中国有色金属学报(英文版)

1003-6326

2011

21

1

139-145

10.1016/S1003-6326(11)60690-0

Projects（50371104 50771106and50731002）supported by the National Natural Science Foundation of China Project（2008K22）supported by the Scientific Research Foundation of Hunan Provincial Department of Land＆Resources China Project supported by Geology Exploration Foundation of Hunan Provincial Department of Land＆Resources China

本校为其他机构

Based on the available experimental data, the Bi-Ni binary system was optimized thermodynamically by the CALPHAD method. The solution phases, including liquid, fcc_A1(Ni) and rhombohedral_A7(Bi), were described as substitutional solution phases, of which the excess Gibbs energies were expressed with the Redlich-Kister polynomial. The intermetallic compound, BiNi, was modeled using three sublattices (Bi)(Ni,Va)(Ni,Va) considering its crystal structure (NiAs-type) and the compatibility of thermodynamic database in the multi-component systems, while Bi3Ni was treated as a stoichiometric compound....

基于文献报导的实验数据,采用相图计算(CALPHAD)方法,热力学优化了Bi-Ni二元系相图.该二元系的液相、fcc_A1(Ni) 相和rhombohedral_A7(Bi)相用替换溶液模型来描述,其过剩吉布斯自由能用Redlich-Kister多项式来表达.考虑到晶体结构(NiAs型)以及与多组元体系热力学数据库的兼容性,中间化合物BiNi相采用亚点阵模型:(Bi)(Ni,Va)(Ni,Va);Bi3Ni相处理为化学计量比化合物.最后,通过优化该二元系实测的相图和热力学数据,获得一组能够表达各相吉布斯自由能的自洽的热力学参数.根据这些热力学参数计算的相图和热力学数据与报导的实验数据吻合良好.