...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Letters >Oxidation behavior of a plasma-sprayed functionally graded ZrO_2/Al_2O_3 thermal barrier coating
【24h】

Oxidation behavior of a plasma-sprayed functionally graded ZrO_2/Al_2O_3 thermal barrier coating

机译：等离子喷涂功能梯度ZrO_2 / Al_2O_3热障涂层的氧化行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thermally grown oxide (TGO) scales can provide high temperature oxidation protection if they are slow growing, sound and adherent to the substrate. In thermal barrier coatings (TBCs), failure occurs near or at the interface between the metallic bondcoat and its thermally grown alumina layer. Oxide scales consisting mainly of alumina were grown on duplex (ZrO_2/bondcoat) and functionally graded (ZrO_2/Al_2O_3/bondcoat) systems through static heat treatment at 1050℃. Electron microscopy was used to analyze the microstructures of oxide layers grown on various TBC systems. The difference in thickness of grown oxide scale that resulted from oxidation of various TBC systems was discussed in the light of the effectiveness of alumina interlayer functioning as an additional oxidation barrier. Spallation observed at higher temperature in a functionally graded system was due to phase transformation of γ-Al_2O_3 to α-Al_2O_3, inducing additional residual stress causing a premature failure. However, TBC systems with a thin layer of Al_2O_3 were found to be effective in improving oxidation resistance of protective coatings.
机译：如果热生长氧化皮（TGO）氧化皮生长缓慢，稳固并粘附在基材上，则可以提供高温氧化保护。在热障涂层（TBC）中，失效发生在金属粘结层及其热生长的氧化铝层之间的界面附近或界面处。通过在1050℃下的静态热处理，在双相（ZrO_2 / bondcoat）上生长了主要由氧化铝组成的氧化皮，并在功能上分级了（ZrO_2 / Al_2O_3 / bondcoat）系统。电子显微镜用于分析在各种TBC系统上生长的氧化物层的微观结构。鉴于氧化铝中间层作为附加的氧化阻挡层的有效性，讨论了由各种TBC系统的氧化引起的生长的氧化皮厚度差异。在功能梯度系统中，在较高温度下观察到的散裂是由于γ-Al_2O_3向α-Al_2O_3的相变，从而引起了额外的残余应力而导致过早失效。然而，发现具有Al_2O_3薄层的TBC系统可有效提高保护涂层的抗氧化性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号