Concentration of point defects and site occupancy behavior in ternary NiAl alloys

doi:10.1016/j.msea.2003.09.010

CORC > 金属研究所 > 中国科学院金属研究所

	Concentration of point defects and site occupancy behavior in ternary NiAl alloys
	Hao, YL ; Yang, R ; Song, Y ; Cui, YY ; Li, D ; Niinomi, M
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2004-01-25
卷号	365 期号:1-2 页码:85-89
关键词	site occupancy point defect NiAl intermetallics
ISSN号	0921-5093
DOI	10.1016/j.msea.2003.09.010
通讯作者	Yang, R(ryang@imr.ac.cn)
英文摘要	A model was established under the mean-field first nearest neighbor interaction approximation to evaluate the concentration of point defects and the site occupancy of micro alloyed NiAl. The theoretical results suggest that micro alloying has only slight effect on point defect formation. The vacancy concentration decreases in both the Al-rich and the Ni-rich alloys as compared to binary alloys, while the concentration of the Al anti-site defects increases and that of the Ni anti-site defects decreases by about half the difference of vacancy concentration between the binary and ternary systems on the Al- and Ni-rich sides, respectively. At low concentration, Ga, Si, Ge, Ti, V, Zr, Nb, Hf and Ta occupy the Al sublattice, whereas Mn, Fe and Co occupy the Ni sublattice; the dependence of occupancy on composition and temperature is weak. By contrast, the site preference of Mo, W and Cr changes considerably with alloy chemistry and temperature and they show strong tendency to occupy both sublattices at high temperature. In general, with increasing atomic number, transition metal elements in the same period increasingly tend to substitute for Ni. (C) 2003 Elsevier B.V. All rights reserved.
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000187972000012
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/118408]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang, R
作者单位	1.Chinese Acad Sci, Titanium Alloy Lab, Met Res Inst, Shenyang 110016, Peoples R China 2.Univ London Queen Mary Coll, Dept Mat, London E1 4NS, England 3.Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 4418580, Japan
推荐引用方式 GB/T 7714	Hao, YL,Yang, R,Song, Y,et al. Concentration of point defects and site occupancy behavior in ternary NiAl alloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2004,365(1-2):85-89.
APA	Hao, YL,Yang, R,Song, Y,Cui, YY,Li, D,&Niinomi, M.(2004).Concentration of point defects and site occupancy behavior in ternary NiAl alloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,365(1-2),85-89.
MLA	Hao, YL,et al."Concentration of point defects and site occupancy behavior in ternary NiAl alloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 365.1-2(2004):85-89.