Dissolution equilibrium of Bi vapor and activities of Bi in liquid Ni-Cr-Fe-Nb solutions

doi:10.1016/j.vacuum.2018.07.047

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	Dissolution equilibrium of Bi vapor and activities of Bi in liquid Ni-Cr-Fe-Nb solutions
	Li, XL ; Yang, YQ ; Chen, B ; Xing, WW ; Li, X ; Liu, K
刊名	VACUUM
	2018-10-01
卷号	156 页码:271-276
关键词	Ni-Cr-Fe-Nb alloys Partial vapor pressure of Bi Activities Activity coeffcients Standard free energy of reaction Delta G(0)
ISSN号	0042-207X
DOI	10.1016/j.vacuum.2018.07.047
英文摘要	The vapor pressure and the activity coefficients of minor elements at infinite dilution in liquid Ni-Cr-Fe-Nb alloys are a necessary and important basic property that is required to analyze the behavior of trace elements during metallurgical production process. The carrier gas method has been applied in this study of the dissolution equilibrium of Bi vapor pressures over liquid Ni-Cr-Fe-Nb alloys from 1723 K to 1823K and then the activities as well as the activity coefficients of Bi in liquid Ni-Cr-Fe-Nb alloys were calculated from the results. It is found that Bi shows strong negative deviation from Henrys Law, and the relationship between the standard free energy of dissolution reaction Bi(g) = [Bi](Ni-Cr-Pe-Nb) and temperature is Delta G(0) = A + BT, where A is - 163058 J/mol and B is 52.6 J/(mol.K). At 1773 K and 1873K, the activity coefficients gamma of bismuth at infinite dilution is 0.442 and 0.253, respectively. Under the condition of conventional vacuum melting, the volatile lower limit of Bi can be up to 0.22 ppm, which was calculated by using thermodynamic data mentioned above.
学科主题	Materials Science, Multidisciplinary ; Physics, Applied
语种	英语
WOS记录号	WOS:000445980600036
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79925]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Li, XL,Yang, YQ,Chen, B,et al. Dissolution equilibrium of Bi vapor and activities of Bi in liquid Ni-Cr-Fe-Nb solutions[J]. VACUUM,2018,156:271-276.
APA	Li, XL,Yang, YQ,Chen, B,Xing, WW,Li, X,&Liu, K.(2018).Dissolution equilibrium of Bi vapor and activities of Bi in liquid Ni-Cr-Fe-Nb solutions.VACUUM,156,271-276.
MLA	Li, XL,et al."Dissolution equilibrium of Bi vapor and activities of Bi in liquid Ni-Cr-Fe-Nb solutions".VACUUM 156(2018):271-276.