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Si對(duì)MCrAlY涂層微觀結(jié)構(gòu)及性能的影響
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北京礦冶研究總院,北京礦冶研究總院,北京礦冶研究總院,北京礦冶研究總院

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Influence of Si on Microstructures and High-Temperature properties of MCrAlY Type Coating
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    摘要:

    本文制備了Si含量分別為0，2%及5%的CoCrAlSiY合金涂層，研究了Si元素的添加對(duì)合金粉末及涂層的組織、結(jié)構(gòu)及性能的影響，初步探討了Si元素對(duì)涂層高溫性能的作用機(jī)理。研究結(jié)果表明：Si元素主要分布在涂層的β相中，通過影響β相的含量和分布對(duì)涂層的高溫性能產(chǎn)生影響，Si推進(jìn)了合金由內(nèi)氧化向外氧化發(fā)生的過程，促進(jìn)了保護(hù)性氧化膜的形成，但Si含量過高，會(huì)引起氧化膜的PBR值增加，氧化膜的應(yīng)力變大，不利于涂層高溫抗熱震性能的提高。

    Abstract:

    The CoCrAlSiY alloy coating with a Si mass concentration of 0, 2% and 5% was prepared in this work. The effect of Si element on the structure and properties of the alloy powder and coating was analyzed. In addition, the function of Si element on the high temperature performance of the coating was also discussed. The results show that the Si element is mainly distributed in the β phase, whose volume content and distribution have a great influence on the high temperature performance of the coatings. Furthermore, the Si element promotes the change from internal oxidation to external oxidation of alloy and the formation of the protective oxide film. However, the higher Si addition results in a higher PBR value of oxide film, which will increase the oxide film stress. This is not connected to the improvement of the coating thermal shock resistance at high temperatures.

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張淑婷,杜開平,任先京,史記. Si對(duì)MCrAlY涂層微觀結(jié)構(gòu)及性能的影響[J].稀有金屬材料與工程,2018,47(9):2652~2656.[Shuting Zhang, Kaiping Du, Xianjing Ren, Ji Shi. Influence of Si on Microstructures and High-Temperature properties of MCrAlY Type Coating[J]. Rare Metal Materials and Engineering,2018,47(9):2652~2656.]
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  • 收稿日期:2017-02-09
  • 最后修改日期:2017-04-14
  • 錄用日期:2017-04-14
  • 在線發(fā)布日期: 2018-11-01
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