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http://dx.doi.org/10.4191/KCERS.2002.39.9.851

Friction and Wear Properties of Plasma-sprayed Cr2O3-MoO3 Composite Coatings at High Temperature  

Lyo, In-Woong (Tribology Research Center, Korea Institute of Science and Technology)
Ahn, Hyo-Sok (Tribology Research Center, Korea Institute of Science and Technology)
Lim, Dae-Soon (Department of Material Science and Engineering, Korea University)
Publication Information
Journal of the Korean Ceramic Society / v.39, no.9, 2002 , pp. 851-856 More about this Journal
Abstract
Tribological behavior of plasma-sprayed $Cr_2O_3$-based coatings containing $MoO_3$ at 450$^{\circ}C$ was investigated to understand the influence of $MoO_3$. A reciprocal disc-on-plate type tribo-tester was employed to examine fricition and wear behavior of the specimens. The microstructure and phase composition of the coating was characterized with Transmission Electron Microscopy(TEM). The TEM analysis indicated that $MoO_3$ was dispersed into the grain boundary, resulting in the increase of the hardness and density of the coating. Worn surfaces were investigated by scanning electron microscopy and chemistry of the worn surfaces was analyzed using a X-ray Photoelectron Spectrometer(XPS). The results showed that the friction coefficient of the $MoO_3$-added coatings was lower than that without $MoO_3$ addition. The larger protecting layers were observed at the worn surface of plasma spray coated specimens with $MoO_3$ composition in the protecting layer appears to be more favorable in reducing the friction.
Keywords
Plasma-sprayed coatings; $Cr_2O_3$; $MoO_3$; Friction; Wear;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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