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Effect of silicon on oxidation of Ni-15Al alloy
Wu, Y; Niu, Y; Wu, WT
Corresponding AuthorWu, Y(ywu@imr.ac.cn)
2005-04-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume15Issue:2Pages:296-299
AbstractThe oxidation of binary Ni-Al alloy containing 15% (mole fraction, the same below if not mentioned) At (Ni-15Al), and of a ternary alloy with the same At content but also containing 4% Si (Ni-4Si-15Al) has been studied at 1 000 ° C under 1.0 X 10(5)Pa O-2 to examine the effect of the addition of Si on the oxidation of Ni-15Al, Oxidation of Ni-15Al produces a duplex scale composed of an outer NiO layer and an inner layer riched in Al2O3. On the contrary, Ni-4Si-15Al forms an external alumina layer directly in contact with the alloy presenting only trace of NiO and the Ni-Al spinet. As a result, the kinetics of Ni-15Al shows a fast initial stage followed by two subsequent parabolic stages with decreasing rate constants, while Ni-4Si-15Al presents essentially a single nearly-parabolic behavior with a rate constant similar to that of the final stage of Ni-15Al. Therefore, the addition of 4% Si significantly reduces the oxidation rate during the initial stage by preventing the formation of Ni-riched scales and promoting an earlier development of an exclusive external alumina layer on the alloy surface.
KeywordNi-Si-15Al ternary alloy oxidation
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000228956700019
PublisherALLERTON PRESS INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82693
Corresponding AuthorWu, Y
AffiliationChinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Wu, Y,Niu, Y,Wu, WT. Effect of silicon on oxidation of Ni-15Al alloy[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2005,15(2):296-299.
APA Wu, Y,Niu, Y,&Wu, WT.(2005).Effect of silicon on oxidation of Ni-15Al alloy.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,15(2),296-299.
MLA Wu, Y,et al."Effect of silicon on oxidation of Ni-15Al alloy".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 15.2(2005):296-299.
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