期刊
ACTA BIOMATERIALIA
卷 3, 期 6, 页码 944-951出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.actbio.2007.06.001
关键词
hydroxyapatite; carbon nanotubes; plasma spraying; wear; simulated body fluid
Wear behavior of plasma-sprayed carbon nanotube (CNT)-reinforced hydroxyapatite (HA) coating is evaluated in the simulated body fluid environment. Apart from enhancing the fracture toughness and providing biocompatibility, CNT-reinforced HA coating demonstrated superior wear resistance compared with that of hydroxyapatite coating without CNT. Initiation and propagation of microcracks during abrasive wear of plasma-sprayed hydroxyapatite coatings was suppressed by CNT reinforcement. Surface characterization and wear studies have shown that in addition to acting as underprop lubricant, CNTs provide reinforcement via stretching and splat-bridging for enhanced abrasion resistance in vitro. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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