WANG Fuhui LO U Hanyi BAI Linxiang Institute of Corrosion and Protection of Metals
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Academia Sinica
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Shenyang
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China WANG Fuhui
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Institute of Corrosion and Protection of Metals
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Academia Sinica
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Shenyang 110015
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China
金属学报(英文版)
The yttraluminizing coating on the Ni-base superalloys has been developed by dipping the specimens in a specially made yttrium-containing slurry as an underlayer and over spraying a Cr-Al slurry as a protective layer,then heating to 1060℃ and holding for 1 h under argon atmosphere.Analysis by EPMA showed that the yttrium was concentrated in the intermediate zone of the coating as metallic compound Ni-5Y.After exposure to air up to 1000℃,the oxidation test revealed that the anti-oxidation resistance of the yttraluminizing coating with post-aluminizing is much superior to that with single aluminizing only.
关键词:
yttraluminizing coating
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王福会
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楼翰一
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白林祥
金属学报
本文用含钇的特殊料浆做底层,用Cr-Al料浆做保护层,在1060℃氩气保护下保温1h,获得了含稀土钇的涂层。电子探针微区成分分析结果表明,钇存在于涂层的中间部位并以Ni_5Y金属间化合物的形式存在。1000℃空气中氧化结果表明,一次Al-Y共渗涂层抗氧化性能很差,涂层中出现了大量的钇和铝的内氧化。经二次渗铝的Al-Y共渗涂层的抗氧化性能明显优于单渗铝涂层。
关键词:
Al-Y共渗涂层
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anti-oxidation property
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Ni-base superalloy
