等离子－激光复合制备NiCrAIY-Al_2O_3层的抗氧化性研究
Study on Oxidation Resistance of NiCrAIY-Al_2O_3 Coatings Obtained by Plasma-laser Technology
查看参考文献17篇
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文摘
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研究了等离子－激光（plasma spraying and laser remelting, PS&LR）复合制备NiCrAlY-Al_2O_3层的抗氧化性能。Al_2O_3的加入量为（质量分数，％）10～30，粒度分50～75μm和0.31/μm两种。1000 ℃、1050 ℃下的等温氧化结果表明，PS&LR法制备的涂层氧化速率仅为等离子喷涂层的1／2，NiCrAlY-Al_2O_3层的氧化速率低于NiCrAlY层，且随Al_2O_3第二相含量的增加或粒径的减少，涂层氧化速率减小。通过氧化动力学曲线、氧化物的形貌和结构，分析了Al_2O_3第二相和激光重熔改善NiCrAlY等离子喷涂层抗氧化性的机理。 |
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其他语种文摘
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The oxidation resistance of NiCrAlY-Al_2O_3 coatings obtained by plasma spraying and laser remelting (PS&LR) processes was studied. The range of content of Al_2O_3 second phase was 10%～30% (wt). And two types of grain size of Al_2O_3 which were 50～75μm and 0.31μm were used. As results of isothermal oxidation experiments at 1000 ℃ and 1050 ℃, the oxidation velocity of coatings obtained by plasma-laser technology is only one half of that of plasma sprayed coatings. The oxidation velocity of NiCrAlY-Al_2O_3 coatings is lower than that of NiCrAlY coatings. And the oxidation velocity of NiCrAlY-Al_2O_3 coatings is decreased with the content of Al_2O_3 second phase increasing or the grain size of Al_2O_3 decreasing. By analyzing oxidation kinetics, oxides morphology and structure, the mechanism that Al_2O_3 second phase and laser remelting improved oxidation resistance of NiCrAlY plasma sprayed coatings were discussed. |
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来源
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金属热处理
,2002,27(4):8-12 【核心库】
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关键词
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等离子－激光
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NiCrAlY-Al_2O_3层
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抗氧化性
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氧化速率
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地址
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1.
中国科学院金属研究所, 沈阳, 110016
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北京航空工艺研究所, 高能束流加工技术重点实验室, 北京, 100024
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语种
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中文 |
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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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0254-6051 |
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学科
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金属学与金属工艺 |
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文献收藏号
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CSCD:1035037
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