This work investigates the influence of plasma-sprayed deposits on the fatigue life of coated specimens. Hydroxyapatite (HA) and TiO2 were deposited on dog-bone shaped substrates under different spraying conditions while measuring in-flight particle temperature and velocity. The coated specimens were then subjected to cyclic bending with constant deflection and the number of cycles to failure was recorded. It was found that the higher the temperature and velocity of particles during spraying, the greater the improvement in fatigue life up to a maximum of 46% compared to uncoated samples.

fatigue life, hydroxyapatite coating, in-flight particle properties, plasma spraying, titanium dioxide coating
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Copyright © 2009 ASM International. All rights reserved.
2009
ASM International
Topics
Bioactive ceramics Particle analysis Oxide-based ceramics Plasma spray coating Fatigue properties
Issue Section:
Biomedical Coatings
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