High temperature oxidation behavior of Ti(Al,Si)_3 diffusion coating on γ-TiAl by cold spray
冷喷涂制备 γ-TiAl表面Ti(Al,Si)_3扩散涂层的高温氧化行为
查看参考文献25篇
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文摘
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A Ti(Al,Si)_3 diffusion coating was prepared on γ-TiAl alloy by cold sprayed Al-20Si alloy coating, followed by a heat-treatment. The isothermal and cyclic oxidation tests were conducted at 900 °C for 1000 h and 120 cycles to check the oxidation resistance of the coating. The microstructure and phase transformation of the coating before and after the oxidation were studied by SEM, XRD and EPMA. The results indicate that the diffusion coating shows good oxidation resistance. The mass gain of the diffusion coating is only a quarter of that of bare alloy. After oxidation, the diffusion coating is degraded into three layers: an inner TiAl_2 layer, a two-phase intermediate layer composed of a Ti(Al,Si)_3 matrix and Si-rich precipitates, and a porous layer because of the inter-diffusion between the coating and substrate. |
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其他语种文摘
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通过冷喷涂Al-20Si合金涂层及后续热扩散处理在γ-TiAl合金表面制备Ti(Al,Si)_3扩散涂层。对涂层进行900 °C下1000 h等温氧化和120次循环氧化来测试其抗氧化性能。通过扫描电子显微镜、X-射线衍射以及电子探针分析涂层氧化前后的组织和相转变。结果表明:该扩散涂层具有良好的抗氧化能力,其氧化增重只有基体合金的四分之一。由于在氧化过程中涂层与基体发生互扩散,氧化后的涂层退化为3层:TiAl_2内层、由Ti(Al,Si)_3和富Si相组成的中间层以及多孔层。 |
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来源
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Transactions of Nonferrous Metals Society of China
,2016,26(4):1155-1162 【核心库】
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DOI
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10.1016/S1003-6326(16)64214-0
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关键词
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Ti(Al,Si)_3 diffusion coating
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γ-TiAl alloy
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cold spray
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heat-treatment
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high temperature oxidation
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地址
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Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016
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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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文献收藏号
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CSCD:5702950
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