Effects of Dy on cyclic oxidation resistance of NiAl alloy
查看参考文献18篇
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文摘
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The NiAl alloys modified by reactive element(RE), dysprosium(Dy), were produced by arc melting. The microstructures of the modified alloys were investigated by field emission-scanning electron microscope(FE-SEM) equipped with energy dispersive spectroscope(EDS) and back scatter detector. Cyclic oxidation tests at 1 200 ℃ were conducted to assess the cyclic oxidation performance of the alloys. The Dy dopant prevents the surface rumpling of the oxide scale and the formation of cavities beneath the oxide scale. The pegs consisting of Dy-rich oxide inclusion core and an outer alumina sheath develop deeply in the alloy and improve the oxide scale adhesion. 0.05%-0.1% (molar fraction) Dy dramatically improves the cyclic oxidation resistance of the NiAl alloy. Too high concentration of Dy is deleterious because of the fast oxidation rate caused by severe internal oxidation. |
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来源
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Transactions of Nonferrous Metals Society of China
,2009,19(5):1185-1189 【核心库】
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DOI
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10.1016/s1003-6326(08)60426-4
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关键词
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NiAl
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reactive element
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dysprosium(Dy)
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oxidation
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adhesion
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地址
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1.
Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing Key Laboratory for Advanced Functional Materials and Thin Film Technology, Beijing, 100083
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Shenyang Liming Aero-Engine Group Corporation, Liaoning, Shenyang, 110043
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1003-6326 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金
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国家教育部长江学者与创新团队发展计划
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文献收藏号
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CSCD:3712107
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