Wear Resistance of Plasma-Sprayed Al2O3-TiO2 Nanocoatings

Jee Hoon Ahn; Eun Pil  Song; Sung Hak Lee; Nack Kim

doi:10.4028/www.scientific.net/KEM.345-346.641

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 345-346Wear Resistance of Plasma-Sprayed Al2O3-TiO2...

Wear Resistance of Plasma-Sprayed Al₂O₃-TiO₂ Nanocoatings

Abstract:

Wear resistance of Al2O3-8wt.%TiO2 coatings plasma-sprayed using nanopowders was investigated. Four types of nanostructured Al2O3-8wt.%TiO2 powders were plasma-sprayed on a low-carbon steel substrate by using different critical plasma spray parameters (CPSP). The coatings consisted of completely melted and partially melted regions. The hardness of the coatings increased with increasing CPSP, while the wear resistance was the highest for the coating sprayed with the lowest CPSP. The main wear mechanism was a delamination mode in the coating sprayed with the high CPSP, but was changed to an abrasive mode in the coating sprayed with the low CPSP. According to this change in the wear mechanism, the wear resistance was the best in the coating sprayed with lowest CPSP, while its hardness was lowest.

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Periodical:

Key Engineering Materials (Volumes 345-346)

Pages:

641-644

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.345-346.641

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Online since:

August 2007

Authors:

Jee Hoon Ahn, Eun Pil Song, Sung Hak Lee, Nack Kim

Keywords:

Al₂O₃-TiO₂ Oxide, Nanopowder, Plasma Spraying, Wear

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