Effect of non-uniform growth of TGO layer on cracking behaviors in thermal barrier coatings: A numerical study
作者: Jianan SongHongyu QiDuoqi ShiXiaoguang YangShaolin Li
作者单位: 1Department of Energy and Power Engineering, Beihang University, Beijing 100191, China
2Beijing Key Laboratory of Aero-Engine Structure and Strength, Beijing 100191, China
刊名: Surface & Coatings Technology, 2019, Vol.370 , pp.113-124
来源数据库: Elsevier Journal
DOI: 10.1016/j.surfcoat.2019.04.069
关键词: Non-uniform growthTGOThermal barrier coatingsNumericalAir-plasma-sprayed
英文摘要: Abstract(#br)The growth of thermally grown oxide (TGO) always induces large deformation and growth stress in thermal barrier coating systems (TBCs), which play a major role in the initiation and propagation of interfacial cracks. In the present work, the influence of TGO non-uniform growth on stress evolution and interfacial crack initiation is investigated by the finite element method. The results demonstrate that, compared with a uniform growth model, the non-uniform growth of TGO increases the magnitude of residual stress in the TC layers and leads to the early initiation of interfacial cracks. Moreover, the difference in maximum stress between uniform and non-uniform growth increases with the increase in interfacial roughness. However, the change in TGO growth mode and interfacial...
全文获取路径: Elsevier  (合作)
影响因子:1.941 (2012)

  • barrier 堡坝
  • uniform 一样的
  • growth 生长
  • sprayed 喷雾的
  • thermal 热的
  • numerical 数字的
  • study 学习
  • cracking 裂开
  • plasma 深绿玉髓
  • layer