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WANG Dongsheng, TIAN Zongjun, ZHANG Shaowu, QU Guang, SHEN Lida, HUANG Yinhui. Comparison of thermal insulation capability between plasma-sprayed and laser-clad thermal barrier coatings[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (8): 5-8.
Citation: WANG Dongsheng, TIAN Zongjun, ZHANG Shaowu, QU Guang, SHEN Lida, HUANG Yinhui. Comparison of thermal insulation capability between plasma-sprayed and laser-clad thermal barrier coatings[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (8): 5-8.
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Comparison of thermal insulation capability between plasma-sprayed and laser-clad thermal barrier coatings

  • 1.

    College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Department of Mechanical Engineering, Tongling University, Tongling 244000, China

  • 2.

    College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • 3.

    Department of Mechanical Engineering, Tongling University, Tongling 244000, China

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  • Received Date: May 29, 2011
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    • Abstract
  • Different Al2O3-13%TiO2 thermal barrier coatings(TBCs) were fabricated including the plasma-sprayed conventional coating, nanostructured coating and laser-clad nanostructured coating.Based on the analysis of microstructures of three coatings, the thermal insulation capabilities of the different coatings were comparatively studied.The results revealed that the as-sprayed conventional coating had a typical lamellar stacking characteristic.However, the nanostructured coating showed a bimodal microstructure, which was composed of fully melted regions and partially melted regions(remained nanoparticles).The fully melted regions in the plasma-sprayed nanostructured coatings were of lamellar stacking structure, while the fully melted regions in the laser-clad nanostructured coating was composed of fine equiaxed grains.The plasma-sprayed nanostructured coating displayed the best thermal barrier effect, and the thermal barrier effect of laser-clad nanostructured coating was better than that of plasma-sprayed conventional coatings.
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