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Concentration of point defects and site occupancy behavior in ternary NiAl alloys
Hao, YL; Yang, R; Song, Y; Cui, YY; Li, D; Niinomi, M
Corresponding AuthorYang, R(ryang@imr.ac.cn)
2004-01-25
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume365Issue:1-2Pages:85-89
AbstractA 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.
Keywordsite occupancy point defect NiAl intermetallics
DOI10.1016/j.msea.2003.09.010
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000187972000012
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/118409
Collection中国科学院金属研究所
Corresponding AuthorYang, R
Affiliation1.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
Recommended Citation
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.
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