Investigation of the chemical composition of the thermally grown oxide layer in thermal barrier systems with NiCoCrAlY bond coats

被引:25
|
作者
Mercer, C. [1 ]
Faulhaber, S.
Yao, N.
McIlwrath, K.
Fabrichnaya, O.
机构
[1] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
[2] Princeton Univ, Inst Sci & Technol, Princeton, NJ 08544 USA
[3] Hitachi High Technol Amer, Pleasanton, CA 94588 USA
[4] Max Planck Inst Met Res, Stuttgart, Germany
来源
SURFACE & COATINGS TECHNOLOGY | 2006年 / 201卷 / 3-4期
关键词
thermal barrier coatings; thermally grown oxide; NiCoCrAlY; energy-dispersive spectroscopy; hafnia; fluorite;
D O I
10.1016/j.surfcoat.2006.02.024
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The morphology and composition of the thermally grown oxide (TGO) layer in a thermal barrier system with a NiCoCrAlY bond coat are characterized by a combination of scanning and transmission electron microscopy, focused ion beam sectioning and energy-dispersive spectroscopy (EDS) element mapping. The investigation has revealed a complex TGO that exhibits numerous thickness inhomogeneities ('pegs'), and a sizable distribution of nano-scale second phase particles. These particles have been determined to be of two types: regions of entrained bond coat and oxides based on Y2O3 and HfO2. The most probable phase makeup of the oxides is a cubic fluorite of approximate composition 4HfO(2)-Y2O3. Diffusion of Hf and Y from the bond coat or entrapment of bond coat elements during TGO growth are the most likely mechanisms for the formation of these oxide particles. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:1495 / 1502
页数:8
相关论文
共 50 条
  • [21] The evolution of residual stress in the thermally grown oxide on Pt diffusion bond coats in TBCs
    Selçuk, A
    Atkinson, A
    ACTA MATERIALIA, 2003, 51 (02) : 535 - 549
  • [22] A numerical assessment of the durability of thermal barrier systems that fail by ratcheting of the thermally grown oxide
    Xu, T
    He, MY
    Evans, AG
    ACTA MATERIALIA, 2003, 51 (13) : 3807 - 3820
  • [23] Ruthenium-containing bond coats for thermal barrier coating systems
    B. Tryon
    F. Cao
    K. S. Murphy
    C. G. Levi
    T. M. Pollock
    JOM, 2006, 58 : 53 - 59
  • [24] Rutheniumm-containing bond coats for thermal barrier coating systems
    Tryon, B
    Cao, F
    Murphy, KS
    Levi, CG
    Pollock, TM
    JOM, 2006, 58 (01) : 53 - 59
  • [25] Progress in Novel Electrodeposited Bond Coats for Thermal Barrier Coating Systems
    Maniam, Kranthi Kumar
    Paul, Shiladitya
    MATERIALS, 2021, 14 (15)
  • [26] Growth kinetics of thermally grown oxide in thermal barrier coatings
    Ogawa, K
    Gotoh, N
    Shoji, T
    ADVANCED MATERIALS AND PROCESSES FOR GAS TURBINES, 2003, : 187 - 195
  • [27] The growth and influence of thermally grown oxide in a thermal barrier coating
    Chen, W. R.
    Wu, X.
    Marple, B. R.
    Patnaik, P. C.
    SURFACE & COATINGS TECHNOLOGY, 2006, 201 (3-4): : 1074 - 1079
  • [28] Effect of thermally grown oxide (TGO) microstructure on the durability of TBCs with PtNiAl diffusion bond coats
    Spitsberg, I
    More, K
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 417 (1-2): : 322 - 333
  • [29] The impact of the growth of thermally grown oxide layer on the propagation of surface cracks within thermal barrier coatings
    Lv, JunNan
    Fan, XueLing
    Li, Qun
    SURFACE & COATINGS TECHNOLOGY, 2017, 309 : 1033 - 1044
  • [30] Topcoat Transmission Measurement and Sensitivity Evaluation for Detection of Thermally Grown Oxide Layer of Thermal Barrier Coating
    Fukuchi, Tetsuo
    Eto, Shuzo
    Okada, Mitsutoshi
    Fujii, Tomoharu
    ELECTRONICS AND COMMUNICATIONS IN JAPAN, 2016, 99 (08) : 72 - 78