Volume 39 Issue 9
Sep.  2013
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Sun Youbei, Zhou Chungen. Effect of spraying power on microstructure and property of nanostructured thermal barrier coatings[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(9): 1275-1278. (in Chinese)
Citation: Sun Youbei, Zhou Chungen. Effect of spraying power on microstructure and property of nanostructured thermal barrier coatings[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(9): 1275-1278. (in Chinese)

Effect of spraying power on microstructure and property of nanostructured thermal barrier coatings

  • Received Date: 24 Oct 2012
  • Publish Date: 30 Sep 2013
  • Effect of air plasma spraying power on microstructure and thermal shock of nanostructured yttria stabilized zirconia (YSZ) thermal barrier coatings was investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that there were two regions of melted phases and non-molten phases for the ceramic top coating under different power, non-molten phases included the nanosized grains, and phase composition was metastable tetragonal zirconia. With the increase in power, the area of nanosized grains gradually decreased, the porosity of the coating gradually reduced, and the life of the coating increased first and then decreased. The coating failure position was located at the ceramic top coating close to thermally grown oxide(TGO).

     

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