Tribological behavior of plasma-sprayed carbon nanotube-reinforced hydroxyapatite coating in physiological solution.
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.
Balani
Kantesh
K
Department of Mechanical and Materials Engineering, Florida International University, Miami, FL 33174, USA.
Chen
Yao
Y
Harimkar
Sandip P
SP
Dahotre
Narendra B
NB
Agarwal
Arvind
A
D017886:Durapatite; D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D012996:Solutions; D013499:Surface Properties
D037742:Nanotubes, Carbon; D012996:Solutions; D017886:Durapatite