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復(fù)合噴丸強(qiáng)化對EB-PVD制備的CoCrAlY涂層的高溫氧化性能的影響
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北京航空材料研究院 表面工程研究所;貴州大學(xué) 材料與冶金學(xué)院,貴州大學(xué) 材料與冶金學(xué)院,北京航空材料研究院 表面工程研究所,北京航空材料研究院 表面工程研究所

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TG 146.2

基金項(xiàng)目:

國家高技術(shù)研究發(fā)展計劃（863計劃）課題（2015AA034403），貴州省高層次創(chuàng)新人才培養(yǎng)項(xiàng)目（黔科合人才[2015]4009）&貴州省應(yīng)用基礎(chǔ)研究計劃重大項(xiàng)目（黔科合 JZ 字[2014]2003）


Study on performance of isothermal oxidation of CoCrAlY coatings prepared by EB-PVD after surface compound shot peening process
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Research Institute of Surface Engineering,Beijing Institute of Aeronautical Materials;College of Materials and Metallurgy,Guizhou University,College of Materials and Metallurgy,Guizhou University,Research Institute of Surface Engineering,Beijing Institute of Aeronautical Materials,Research Institute of Surface Engineering,Beijing Institute of Aeronautical Materials

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    摘要:

    為了研究復(fù)合型的高能噴丸工藝對EB-PVD制備的CoCrAlY涂層的高溫氧化性能，采用0.3N、0.3N+0.1N和0.3N+0.2N的噴丸強(qiáng)度對CoCrAlY涂層進(jìn)行了表面強(qiáng)化。觀察了噴丸強(qiáng)化前后涂層的表面形貌；測量了噴丸前后涂層的表面粗糙度、表面殘余應(yīng)力、涂層的厚度和截面硬度；對比分析了噴丸前后涂層物相變化以及涂層高溫氧化性能。研究結(jié)果表明：復(fù)合噴丸強(qiáng)化比普通高能噴丸強(qiáng)化對EB-PVD制備的CoCrAlY涂層的抗高溫氧化性能提升更加明顯，0.3N+0.1N的復(fù)合噴丸工藝對提升涂層的高溫抗氧化性能最好。相較普通噴丸工藝，復(fù)合噴丸工藝更能明顯降低EB-PVD制備的CoCrAlY涂層表面粗糙度，提高涂層的致密度，改善物相結(jié)構(gòu)，進(jìn)而提升涂層的抗高溫氧化性能。噴丸強(qiáng)度大于等于0.3N時，CoCrAlY涂層表面出現(xiàn)鱗狀突出物，導(dǎo)致氧化物在此處擇優(yōu)生長，生成的氧化膜中的應(yīng)力在此處集中而發(fā)生破裂，降低涂層的使用壽命，但復(fù)合噴丸能消除該鱗狀突出物。

    Abstract:

    In order to study the isothermal oxidation performance of CoCrAlY coatings prepared by EB-PVD after high energy compound shot peening process with different intensity, the CoCrAlY coatings were surface shot peened with strength of 0.3N, 0.3N+0.1N and 0.3N+0.2N. The surface morphology of coatings were observed before and after shot peening; The surface roughness, surface residual stress, thickness and cross-sectional hardness of the coatings were measured after shot peening; The phases change and performance of isothermal oxidation of CoCrAlY coatings were analysised after shot peening. The investigation results show that: the performance of isothermal oxidation of CoCrAlY coating prepared by EB-PVD with compound shot peening is improved more than common shot peening, and the compound shot peening with strength of 0.3N+0.1N show the best performance of isothermal oxidation. Compared with common shot peening, compound shot peening process can reduce the surface roughness of CoCrAlY coating prepared by EB-PVD, increase the density of the coating, change the phases structure, and lead to the improvement of isothermal oxidation performance of CoCrAlY coating. When the shot peening intensity is greater than or equal to 0.3N, scales formed on the surface of CoCrAlY coating. And result in preferential growth of TGO in the place. Because of TGO film rupture by stress concentration here, the service life of coating is degraded. Meanwhile, the compound shot peening can remove the scales.

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鄧仲華,劉其斌,何利民,黃光宏.復(fù)合噴丸強(qiáng)化對EB-PVD制備的CoCrAlY涂層的高溫氧化性能的影響[J].稀有金屬材料與工程,2018,47(9):2840~2846.[Deng Zhonghua, Liu Qibin, He Limin, Huang Guanghong. Study on performance of isothermal oxidation of CoCrAlY coatings prepared by EB-PVD after surface compound shot peening process[J]. Rare Metal Materials and Engineering,2018,47(9):2840~2846.]
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  • 收稿日期:2016-10-27
  • 最后修改日期:2017-03-16
  • 錄用日期:2017-04-13
  • 在線發(fā)布日期: 2018-11-01
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