Journal
SURFACE & COATINGS TECHNOLOGY
Volume 205, Issue 4, Pages 1004-1008Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2010.06.003
Keywords
Suspension plasma spraying; Spray parameters; Alumina; Zirconia; Microstructure; Wear properties
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Several alumina and alumina-zirconia composite coatings were manufactured by suspension plasma spraying (SPS), implementing different operating conditions in order to achieve dense and cohesive structures. Temperatures and velocities of the in flight particles were measured with a commercial diagnostic system (Accuraspray (R)) at the spray distance as a function of the plasma operating parameters. Temperatures around 2000 degrees C and velocities as high as 450 m/s were detected. Hence, coatings with high amount of a-alumina phase were produced. The microstructure evolution according to the spray parameters was studied as well as the final tribological properties showing efficient wear resistance. (C) 2010 Elsevier B.V. All rights reserved.
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