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表面處理對熱障涂層壽命及失效機理的影響研究
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北京航空材料研究院,北京航空材料研究院,北京航空材料研究院,北京航空材料研究院,北京航空材料研究院,西安航空發(fā)動機集團有限公司 西安

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Effect of Surface Treatments on Lifetime and Failure Mechanism of Thermal Barrier Coatings
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Beijing Institute of Aeronautical Materials,,,,,

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    摘要:

    采用真空電弧離子鍍和電子束物理氣相沉積技術(shù)在高溫合金DZ125上沉積NiCrAlYSi金屬粘結(jié)層和YSZ陶瓷面層。研究了拋光、振動光飾、砂紙打磨及吹砂四種不同的表面處理方法對金屬粘結(jié)層表面微觀結(jié)構(gòu)和界面狀態(tài)的影響。實驗結(jié)果表明，四種表面處理方法都改善了金屬粘結(jié)層表面結(jié)構(gòu)，降低了表面粗糙度。進一步探討了表面處理對涂層結(jié)合強度的作用，結(jié)果表明經(jīng)過表面處理后的樣品結(jié)合強度都得到了提高。并分析了不同表面處理方法對涂層壽命的影響，最終明確了熱障涂層失效機理。

    Abstract:

    NiCrAlYSi bond coating has been deposited on DZ125 alloy substrates by arc ion plating. YSZ has been deposited on the bond coating by EB-PVD technology. The microstructure and interface morphology of the sandpapered (SS), polished (PS), vibratory polished (VS) and grit-blasted samples (GS) have been investigated and compared in detail. The results indicate that the bond coating surface has been polished and the roughness has been decreased due to the effect of surface treatments. Furthermore, effect of surface treatments on bond strength is studied which the bond strength has been increased by different surface treatments. The durability of these systems by different surface treatments has been measured and compared. Based on the electron microscopy observations, the failure mechanisms of thermal barrier coatings have been investigated by the various stages of cycle life.

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申造宇,黃光宏,何利民,牟仁德,顧金旺,鄭洪.表面處理對熱障涂層壽命及失效機理的影響研究[J].稀有金屬材料與工程,2016,45(3):776~781.[SHEN Zaoyu, HUANG Guanghong, HE Limin, MU Rende, GU Jinwang, Zheng Hong. Effect of Surface Treatments on Lifetime and Failure Mechanism of Thermal Barrier Coatings[J]. Rare Metal Materials and Engineering,2016,45(3):776~781.]
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  • 收稿日期:2015-03-16
  • 最后修改日期:2015-07-14
  • 錄用日期:2015-09-07
  • 在線發(fā)布日期: 2016-07-07
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