XPS and PAT study on NiAl phase formed in a superalloy by pack cementation

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	XPS and PAT study on NiAl phase formed in a superalloy by pack cementation
	H. Wei; G. C. Hou; X. F. Sun; Q. Zheng; H. R. Guan; Z. Q. Hu
	2006
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	22 期号:6 页码:785-788
摘要	The NiAl phase prepared by pack cementation (PC) on a nickel base superalloy was investigated by X-ray photoelectron spectroscopy (XPS) and positron annihilation technique (PAT). The focus was on the effect of the solid solution of the alloying element from substrate on the binding energy of Ni (Al) 2p peaks and vacancy concentration of the NiAl phase formed in a superalloy. The results showed that the binding energy of Ni 2p peak of the NiAl phase grown in a superalloy was shifted by up-to 0.55 eV at the temperature from 850 to 1050 degrees C towards higher energies and the binding energy of Al 2p peak by up to 1.09 eV in comparison with the NiAl phase formed in pure Ni. The positron lifetimes obtained from the NiAl phase formed in a superalloy were found to be markedly lower than the theoretical values, indicating the decrease in vacancy concentration. The variation of binding energies and, vacancy concentration are possibly due to the solid solution of the alloying atoms from the substrate into the NiAl lattice.
部门归属	chinese acad sci, inst met res, sate key lab corros & protect, shenyang 110016, peoples r china.;wei, h (reprint author), chinese acad sci, inst met res, sate key lab corros & protect, shenyang 110016, peoples r china;hwei@imr.ac.cn
关键词	Nial Phase Ni-base Superalloy Positron Annihilation Technique (Pat) X-ray Photoelectron Spectroscopy (Xps) Intermetallic Compounds Electronic-structure Positron-lifetime Aluminides
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WOS记录号	WOS:000242638500011
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34558
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Wei,G. C. Hou,X. F. Sun,et al. XPS and PAT study on NiAl phase formed in a superalloy by pack cementation[J]. Journal of Materials Science & Technology,2006,22(6):785-788.
APA	H. Wei,G. C. Hou,X. F. Sun,Q. Zheng,H. R. Guan,&Z. Q. Hu.(2006).XPS and PAT study on NiAl phase formed in a superalloy by pack cementation.Journal of Materials Science & Technology,22(6),785-788.
MLA	H. Wei,et al."XPS and PAT study on NiAl phase formed in a superalloy by pack cementation".Journal of Materials Science & Technology 22.6(2006):785-788.