The effect of Ti/Al ratio on the site occupancies of alloying elements in gamma-TiAl

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	The effect of Ti/Al ratio on the site occupancies of alloying elements in gamma-TiAl
	Y. L. Hao ; R. Yang ; Y. Y. Cui ; D. Li
刊名	Intermetallics
	2000
卷号	8 期号:5-6 页码:633-636
关键词	titanium aluminides based on TiAl crystal chemistry of intermetallics site occupancy beam electron-diffraction ternary additions base alloys cr location compound alchemi ti3al mn behavior
ISSN号	0966-9795
中文摘要	The site occupancies of V, Cr, Mn, Fe, Ni, Zr, Nb, Ta, Mo, Ga and Sn (1 similar to 5 at%) in TiAl alloys with different nominal Ti/Al ratios were measured by the atom location channelling enhanced microanalysis (ALCHEMI) method. The results showed that Zr, Nb and Ta invariably occupy Ti sublattice sites, whereas Fe, Ni, Ga and Sn occupy Al sublattice sites, the alloy composition having no significant influence on their site preference. By contrast, the site preference of V, Cr, and Mn changes significantly with alloy composition (the Ti/ Al ratio in particular), the probability of these elements occupying Ti sites decreasing in the above order. In general, with increasing atomic number, elements in the same period show increasing tendency to substitute for Al, so is the tendency to substitute for Ti for elements in the same group of the periodic table. A discussion is made in terms of the Bragg-Williams model by using published bond order data as input, allowing qualitative interpretation of the experimental findings. (C) 2000 Elsevier Science Ltd. All rights reserved.
原文出处	://WOS:000087393800030
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/37041]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. L. Hao,R. Yang,Y. Y. Cui,et al. The effect of Ti/Al ratio on the site occupancies of alloying elements in gamma-TiAl[J]. Intermetallics,2000,8(5-6):633-636.
APA	Y. L. Hao,R. Yang,Y. Y. Cui,&D. Li.(2000).The effect of Ti/Al ratio on the site occupancies of alloying elements in gamma-TiAl.Intermetallics,8(5-6),633-636.
MLA	Y. L. Hao,et al."The effect of Ti/Al ratio on the site occupancies of alloying elements in gamma-TiAl".Intermetallics 8.5-6(2000):633-636.