留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码
Volume 11 Issue 6
Dec.  2004
数据统计

分享

计量
  • 文章访问数:  190
  • HTML全文浏览量:  50
  • PDF下载量:  9
  • 被引次数: 0
Yang Gao, Lun Xie, Feng Pan, and Mengcheng Chen, Microstructure and properties of sputtered thermal barrier coatings, J. Univ. Sci. Technol. Beijing, 11(2004), No. 6, pp. 524-528.
Cite this article as:
Yang Gao, Lun Xie, Feng Pan, and Mengcheng Chen, Microstructure and properties of sputtered thermal barrier coatings, J. Univ. Sci. Technol. Beijing, 11(2004), No. 6, pp. 524-528.
引用本文 PDF XML SpringerLink
Materials

Microstructure and properties of sputtered thermal barrier coatings

  • 通讯作者:

    Yang Gao    E-mail: ygao@tsinghua.edu.cn

  • A 3 kW radio frequency (RF) magnetron-sputtering unit was used to produce zirconia ceramic coatings on hollow turbine blades and vanes, which had been deposited a NiCrAlY bond coat layer by cathodic arc deposition. The NiCrAlY coating surface was shot-peened, and the residual stress in the bond coat layer and the effects of heat treatment on the residual stress are presented.After shot peening porosities and microgaps disappear in the NiCrAlY bond coat, the whole depth profile is residual compressive stress. Coarseness tests show that the roughness value (Rz) decreases from 16.4 to 3.3 μm. The microstructure and phase composition of the coatings were investigated using electron probe microanalysis (EPMA) and X-ray diffraction (XRD). The results show that the NiCrAlY bond coat is composed of γ' and Cr phases, and the Al2O3 scales are formed near the interface between the ZrO2 ceramic layer and the NiCrAlY bond coat. No degradation occurred to RF sputtered ceramic coatings after oxidating at 1150℃ for 100 h,heating at 1150℃ for 5 min and then air-cooling for 500 thermal cycles.
  • Materials

    Microstructure and properties of sputtered thermal barrier coatings

    + Author Affiliations
    • A 3 kW radio frequency (RF) magnetron-sputtering unit was used to produce zirconia ceramic coatings on hollow turbine blades and vanes, which had been deposited a NiCrAlY bond coat layer by cathodic arc deposition. The NiCrAlY coating surface was shot-peened, and the residual stress in the bond coat layer and the effects of heat treatment on the residual stress are presented.After shot peening porosities and microgaps disappear in the NiCrAlY bond coat, the whole depth profile is residual compressive stress. Coarseness tests show that the roughness value (Rz) decreases from 16.4 to 3.3 μm. The microstructure and phase composition of the coatings were investigated using electron probe microanalysis (EPMA) and X-ray diffraction (XRD). The results show that the NiCrAlY bond coat is composed of γ' and Cr phases, and the Al2O3 scales are formed near the interface between the ZrO2 ceramic layer and the NiCrAlY bond coat. No degradation occurred to RF sputtered ceramic coatings after oxidating at 1150℃ for 100 h,heating at 1150℃ for 5 min and then air-cooling for 500 thermal cycles.
    • loading

    Catalog


    • /

      返回文章
      返回