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Microstructure and wear resistance of nanostructured Al2O3-8wt.%TiO2 coatings plasma-sprayed with nanopowders SCIE SCOPUS

Title
Microstructure and wear resistance of nanostructured Al2O3-8wt.%TiO2 coatings plasma-sprayed with nanopowders
Authors
Song, EPAhn, JLee, SKim, NJ
Date Issued
2006-10-05
Publisher
ELSEVIER SCIENCE SA
Abstract
Microstructure and wear resistance of nanostructured Al2O3-8wt.%TiO2 coatings plasma-sprayed with nanopowders were investigated in this study. Four types of nanostructured Al2O3-8wt.%TiO2 coatings were plasma-sprayed on a low-carbon steel substrate by using different critical plasma spray parameters (CPSP). The nanostructured coatings consisted of completely melted region of gamma-Al2O3 phase and partly melted region, and the fraction of the partially melted regions and pores decreased with increasing CPSP. The hardness and wear test results revealed that the hardness of the coatings increased with increasing CPSP, and that the coating sprayed with the lowest CPSP had the best wear resistance, while its hardness was lowest. The main wear mechanism was a delamination one in the coating sprayed with the high CPSP, but was changed to an abrasive one in the coating sprayed with the low CPSP. According to this change in the wear mechanism, the wear resistance was not proportionally increased with the hardness, and was the best in the coating sprayed with the lowest CPSP. (c) 2006 Elsevier B.V. All rights reserved.
Keywords
plasma spray coating; nanopowder; Al2O3-TiO2 oxide; wear resistance; ALUMINA-TITANIA COATINGS; NANOCRYSTALLINE POWDERS; BEHAVIOR
URI
https://oasis.postech.ac.kr/handle/2014.oak/29439
DOI
10.1016/j.surfcoat.2006.01.052
ISSN
0257-8972
Article Type
Article
Citation
SURFACE & COATINGS TECHNOLOGY, vol. 201, no. 39876, page. 1309 - 1315, 2006-10-05
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이성학LEE, SUNG HAK
Dept of Materials Science & Enginrg
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