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Effect of silver addition on surface morphology of Al2O3 scales during oxidation of beta-Nial
Zhang, XJ; Wu, WT; Niu, Y
Corresponding AuthorZhang, XJ(xjzhang@imr.ac.cn)
2005-04-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume41Issue:4Pages:369-374
AbstractThe effect of adding small amounts of Ag (0.5%, 1%, 5% and 10%, atomic fraction) to beta-NiAl on surface morphology of alumina scale during the oxidation at 1000-1100 degrees C and the oxidation kinetics of beta-NiAl and NiAl-lAg were investigated by TGA and SEM/EDS. The kinetics of beta-NiAl presents two parabolic stages controlled by the growth of metastable alumina and stable alpha-Al2O3, respectively, while the kinetics of NiAl-lAg is composed of three different parabolic stages controlled by the growth of gamma-Al2O3, theta-Al2O3 and alpha-Al2O3, respectively. The addition of small amounts of Ag (<1%) to beta-NiAl favors the phase transformation from metastable alumina to alpha-Al2O3, while this effect disappears for an Ag content above 5% at 1000 degrees C oxidation. Finally, the addition of 0.5% Ag to beta-NiAl does not affect the surface morphology of Al2O3 at 1100 degrees C.
Keywordbeta-NiAl Ag high temperature oxidation Al2O3 transformation
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000228756900007
PublisherSCIENCE CHINA PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82088
Corresponding AuthorZhang, XJ
Affiliation1.Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
2.Shenyang Inst Chem Technol, Coll Appl Chem, Shenyang 110142, Peoples R China
Recommended Citation
GB/T 7714
Zhang, XJ,Wu, WT,Niu, Y. Effect of silver addition on surface morphology of Al2O3 scales during oxidation of beta-Nial[J]. ACTA METALLURGICA SINICA,2005,41(4):369-374.
APA Zhang, XJ,Wu, WT,&Niu, Y.(2005).Effect of silver addition on surface morphology of Al2O3 scales during oxidation of beta-Nial.ACTA METALLURGICA SINICA,41(4),369-374.
MLA Zhang, XJ,et al."Effect of silver addition on surface morphology of Al2O3 scales during oxidation of beta-Nial".ACTA METALLURGICA SINICA 41.4(2005):369-374.
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