Air oxidation of two nanophase Ni-Ag alloys at 600-700 degrees C

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	Air oxidation of two nanophase Ni-Ag alloys at 600-700 degrees C
	Z. L. Zhao; Y. Niu; F. Gesmundo; C. L. Wang
	2000
发表期刊	Oxidation of Metals
ISSN	0030-770X
卷号	54 期号:5-6 页码:559-574
摘要	Two nanophase Ni-base alloys containing 50 and 25 at.% Ag prepared by mechanical alloying, denoted Ni-50Ag and Ni-25Ag were oxidized in air at 600 and 700 degreesC for 24hr. Ni-50Ag underwent internal oxidation of nickel, associated with the formation of a continuous outer most layer of silver metal with scaling rates larger than those for pure nickel. On the contrary, Ni-25Ag formed a continuous NiO layer surmounted by a discontinuous silver layer and internal oxidation was suppressed. The oxidation rate of Ni-25Ag decreased with time much more rapidly than predicted by the parabolic rate law during the initial stage and eventually became parabolic, with rate constants much lower than those for the oxidation of pure nickel. These results are attributed to the two-phase nature and particularly, to the very small grain size of the two alloys.
部门归属	acad sinica, inst met res, state key lab corros & protect, shenyang 110015, peoples r china. univ genoa, dipartimento ingn chim, i-16129 genoa, italy.;zhao, zl (reprint author), acad sinica, inst met res, state key lab corros & protect, wencui rd 62, shenyang 110015, peoples r china
关键词	Silver-nickel Mechanical Alloying Oxidation Two-phase Alloys 2-phase Binary-alloys High-temperature Oxidation Possible Scaling Modes Low Oxidant Pressures Internal Oxidation Behavior Scales
URL	查看原文
WOS记录号	WOS:000165725600012
引用统计	被引频次：12[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/321006/37275
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. L. Zhao,Y. Niu,F. Gesmundo,et al. Air oxidation of two nanophase Ni-Ag alloys at 600-700 degrees C[J]. Oxidation of Metals,2000,54(5-6):559-574.
APA	Z. L. Zhao,Y. Niu,F. Gesmundo,&C. L. Wang.(2000).Air oxidation of two nanophase Ni-Ag alloys at 600-700 degrees C.Oxidation of Metals,54(5-6),559-574.
MLA	Z. L. Zhao,et al."Air oxidation of two nanophase Ni-Ag alloys at 600-700 degrees C".Oxidation of Metals 54.5-6(2000):559-574.