Oxidation of four NiAl-Ag alloys at 900 degrees C in 1 atm O-2

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	Oxidation of four NiAl-Ag alloys at 900 degrees C in 1 atm O-2
	Zhang, XJ ; Niu, Y
通讯作者	Zhang, XJ(xjzhang@imr.ac.cn)
	2005
发表期刊	PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5
ISSN	0255-5476
卷号	475-479 页码:775-778
摘要	Small amounts of silver have been added to the intermetallic compound beta-NiAl for the purpose of improving its mechanical properties. Four ternary NiAl-Ag alloys NiAl-0.5Ag, NiAl-1Ag, NiAl-5Ag and NiAl-10Ag (at.%), and an Ag-free beta-NiAl have been oxidized at 900 degrees C for 24 h in 1 atm O-2 to study the effect of the presence of silver on the oxidation of beta-NiAl. The kinetics of all the alloys were generally composed of two main parabolic stages with slightly larger parabolic rate constants for the second stage, except for NiAl-10Ag, which has an instantaneous parabolic rate constant decreasing with time. A continuous external layer of Al2O3 formed on all the alloys. In particular, the scales formed on NiAl-5Ag and NiAl-10Ag contained a thin and discontinuous layer of silver at the alloy/Al2O3 interface. Furthermore, NiAl-10Ag formed also isolated Ag particles or even a discontinuous Ag layer occasionally surmounting the Al2O3 scale. The addition of minor amounts of silver does not affect significantly the oxidation of beta-NiAl, because silver is essentially present as a second phase due to its very small solubility in this intermetallic compound.
关键词	NiAl-Ag ternary alloys oxidation
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000227494709178
出版者	TRANS TECH PUBLICATIONS LTD
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/321006/85193
专题	中国科学院金属研究所
通讯作者	Zhang, XJ
作者单位	1.Chinese Acad Sci, State Key Lab Corros & Protect, Met Res Inst, Shenyang 110016, Peoples R China 2.Shenyang Inst Chem Technol, Shenyang 110142, Peoples R China
推荐引用方式 GB/T 7714	Zhang, XJ,Niu, Y. Oxidation of four NiAl-Ag alloys at 900 degrees C in 1 atm O-2[J]. PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5,2005,475-479:775-778.
APA	Zhang, XJ,&Niu, Y.(2005).Oxidation of four NiAl-Ag alloys at 900 degrees C in 1 atm O-2.PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5,475-479,775-778.
MLA	Zhang, XJ,et al."Oxidation of four NiAl-Ag alloys at 900 degrees C in 1 atm O-2".PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5 475-479(2005):775-778.