Oxidation and hot corrosion of gradient thermal barrier coatings prepared by EB-PVD

被引：0
|
作者：
Guo, Hongbo [1 ]
Gong, Shengkai [1 ]
Xu, Huibin [1 ]
机构：
[1] Sch. of Mat. Sci. and Eng., Beijing Univ. of Aero. and Astron., Beijing 100083, China
来源：
Journal of Materials Science and Technology | 2002年 / 18卷 / 01期
关键词：
Alumina - Corrosion - Oxidation - Turbomachine blades - Vapor deposition;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The performances of gradient thermal barrier coatings (GTBCs) produced by EB-PVD were evaluated by isothermal oxidation and cyclic hot corrosion (HTHC) tests. Compared with conventional two-layered TBCs, the GTBCs exhibit better resistance to oxidation and hot-corrosion. A dense Al2O3 layer in the GTBCs effectively prohibits the 0 and S inward diffusion and the Al and Cr outward diffusion during the tests. On the other hand, an inlaid interface, resulting from the oxidation of the Al along the columnar grains of the bond coat, enhances the adherence of the Al2O3 layer. The failure of the GTBC can finally occur by cracking at the interface between the bond coat and the Al2O3 layer, due to the combined effect of sulfidation of the bond coat and thermal cycling.
引用
收藏
页码：27 / 30
相关论文
共 50 条
  • [11] Oxidation-induced failure of EB-PVD thermal barrier coatings
    Tolpygo, VK
    Clarke, DR
    Murphy, KS
    SURFACE & COATINGS TECHNOLOGY, 2001, 146 : 124 - 131
  • [12] Oxidation and damage of EB-PVD thermal barrier coatings under thermal cycling
    Chen, XQ
    Newaz, GM
    JOURNAL OF MATERIALS SCIENCE LETTERS, 2001, 20 (01) : 93 - 95
  • [13] Effect of thermal exposure on the microstructure and properties of EB-PVD gradient thermal barrier coatings
    Guo, HB
    Gong, SK
    Khor, KA
    Xu, HB
    SURFACE & COATINGS TECHNOLOGY, 2003, 168 (01): : 23 - 29
  • [14] Microstructures evolution, corrosion and oxidation mechanisms of EB-PVD thermal barrier coatings exposed to molten salt corrosion
    Jin, Xiaochao
    Fu, Shengnan
    Li, Pan
    Wang, Jierui
    Hou, Cheng
    Wang, Han
    Wang, Feng
    Fan, Xueling
    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2024, 44 (08) : 5115 - 5128
  • [15] FEM analysis of thermal stresses in gradient thermal barrier coatings produced by EB-PVD
    Guo, H.B.
    Xu, H.B.
    Gong, S.K.
    Acta Metallurgica Sinica (English Letters), 2001, 14 (06) : 493 - 496
  • [16] The Effect of Bond Coat Roughness on the CMAS Hot Corrosion Resistance of EB-PVD Thermal Barrier Coatings
    Xie, Zhihang
    Liu, Qing
    Lee, Kuan-, I
    Zhu, Wang
    Wu, Liberty T.
    Wu, Rudder T.
    COATINGS, 2022, 12 (05)
  • [17] FEM ANALYSIS OF THERMAL STRESSES IN GRADIENT THERMAL BARRIER COATINGS PRODUCED BY EB-PVD
    H.B. Guo
    Acta Metallurgica Sinica(English Edition), 2001, (06) : 493 - 496
  • [18] Microstructure investigation on gradient porous thermal barrier coating prepared by EB-PVD
    Guo, HB
    Bi, XF
    Gong, SK
    Xu, HB
    SCRIPTA MATERIALIA, 2001, 44 (04) : 683 - 687
  • [19] Investigations on the formation of initial cracks in thermal barrier coatings prepared by EB-PVD
    Gong, S.K.
    Deng, L.
    Liu, F.S.
    Xu, H.B.
    Acta Metallurgica Sinica (English Letters), 1996, 9 (06)
  • [20] Development of EB-PVD gradient thermal barrier coatings and their thermal-fatigue behaviors
    Guo, Hongbo
    Gong, Shengkai
    Xu, Huibin
    Liu, Fushun
    Jinshu Xuebao/Acta Metallurgica Sinica, 2000, 36 (07): : 703 - 706
12345