SURFACE-COMPOSITION CHANGES CAUSED BY AR ION-BOMBARDMENT OF AU-NI ALLOYS

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	SURFACE-COMPOSITION CHANGES CAUSED BY AR ION-BOMBARDMENT OF AU-NI ALLOYS
	R. S. Li; J. H. Li; T. Z. Hu
	1992
发表期刊	Surface Science
ISSN	0039-6028
卷号	260 期号:1-3 页码:209-219
摘要	Surface composition changes caused by 1 keV Ar ion bombardment of a series of Au-Ni alloys at room temperature were studied. Using 11 combinations of different energy Auger spectra, the variation of the composition with depth from approximately 0.4 to 1.5 nm in a bombarded Au-Ni alloy was obtained. We found that a drastic variation in concentration took place within the first few layers. This is evidently indicating that a bombardment-induced Gibbsian segregation exists in the Au-Ni system. We also found that the degree of gold depletion at the second layer depended strongly on the bulk composition, thus this depletion became slight as the gold content in alloy was high. In addition, we have roughly estimated the concentration of Au at the topmost layer of a bombarded Au-Ni alloy and found that this value tentatively might be smaller than the bulk one. This result differs from two known examples: C(Au, top) > C(Au, bulk) in a bombarded Au-Cu alloy and C(Cu, top) = C(Cu, bulk) in a bombarded Cu-Ni alloy. Comparing our experimental results with a recent theory presented by Kelly, we suggest that a more sophisticated theory should take this new phenomenon into account.
部门归属	acad sinica,int ctr mat phys,shenyang 110015,peoples r china.;li, rs (reprint author), acad sinica,inst met res,atom imaging solids lab,shenyang 110015,peoples r china
关键词	Electron Spectroscopy Analysis Cu Alloys Induced Segregation Enhanced Diffusion Room-temperature Auger Dependence Nickel
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/39252
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. S. Li,J. H. Li,T. Z. Hu. SURFACE-COMPOSITION CHANGES CAUSED BY AR ION-BOMBARDMENT OF AU-NI ALLOYS[J]. Surface Science,1992,260(1-3):209-219.
APA	R. S. Li,J. H. Li,&T. Z. Hu.(1992).SURFACE-COMPOSITION CHANGES CAUSED BY AR ION-BOMBARDMENT OF AU-NI ALLOYS.Surface Science,260(1-3),209-219.
MLA	R. S. Li,et al."SURFACE-COMPOSITION CHANGES CAUSED BY AR ION-BOMBARDMENT OF AU-NI ALLOYS".Surface Science 260.1-3(1992):209-219.