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EB-PVD热障涂层等温氧化过程中的界面韧性变化 被引量：1

Change in interfacial toughness of EB-PVD thermal barrier coatings during isothermal oxidation
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摘要 用压入法测试了电子束物理气相沉积热障涂层在1100℃等温氧化过程中的界面韧性,该热障涂层体系的界面韧性(Гi)在38～45J m2之间。在等温暴露过程中,界面韧性Гi变化较小;但由于TGO增厚引起涂层的弹性应变能(G0)快速增长,使得归一化的界面韧性(Гi G0)随暴露时间而急剧降低,逐渐趋于1。结果表明,粘结层的热生长氧化物(TGO)的增厚是热障涂层失效的一个重要原因。 Indentation test was used to measure the change in the interfacial toughness of EB-PVD TBCs at 1100℃. Measured interfacial toughness (Г_i) of TBCs is about 38～45 J/m^2 and changes slightly. Due to the rapid increase of elastic strain energy (G_0) induced by the thickening of TGO, the normalized interfacial toughness (Г_i/G_0) decreases sharply and approaches 1 gradually. This result indicates that the thickening of TGO formed by the oxidation of bond coat plays an important role in the failure of TBCs.
作者 徐前岗 唐建新 王宁 陆峰 吴学仁
机构地区 北京航空材料研究院
出处 《航空材料学报》 EI CAS CSCD 2004年第2期46-49,共4页 Journal of Aeronautical Materials
关键词 EB-PVD热障涂层 等温氧化过程 界面韧性 压入法 测试 thermal barrier coatings interfacial toughness isothermal oxidation
分类号 TG174.44 [金属学及工艺—金属表面处理]
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参考文献9

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同被引文献9

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航空材料学报
2004年 第2期

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