Abstract
This paper reports studies into the effect of submicron and nano SiC particles on microstructure, phase composition, hardness, erosion wear, and scratch behavior of Al2O3-20wt.%8YSZ (ZrO2 + 8 wt.% Y2O3) coatings fabricated by atmospheric plasma spraying. The failure mode of erosion wear and scratch for coatings was established and analyzed. The hardness, density, erosion wear, and anti-scratch resistance of coatings fabricated from plasma treating feedstocks were higher than that of coatings made from sintering feedstocks. The erosion wear rate of coatings with SiC was evidently decreased, and there was some small debris on worn surface with characteristic of translamellar fracture. The spallation, fracture, plough, and cracking were main failure mechanism for coatings. In the scratch process, the critical load of coating with SiC was increased. The crack growth resistance of coatings was analyzed from crack length at end of scratch test.
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This work was supported by the Program of Excellent Team at Harbin Institute of Technology.
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Pan, Z.Y., Wang, Y., Li, X.W. et al. Effect of Submicron and Nano SiC Particles on Erosion Wear and Scratch Behavior of Plasma-Sprayed Al2O3/8YSZ Coatings. J Therm Spray Tech 21, 995–1010 (2012). https://doi.org/10.1007/s11666-012-9800-z
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DOI: https://doi.org/10.1007/s11666-012-9800-z