EFFECT OF STAND-OFF DISTANCE ON STRUCTURE AND MECHANICAL PROPERTIES OF HYDROXYAPATITE COATINGS PLASMA-SPRAYED ONTO CARBON/CARBON COMPOSITES

Jin-Ling Sui (), Wu Bo, Zhou Hai, Ning Cao and Mu-Sen Li
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Jin-Ling Sui: Center of Engineering and Education, Beijing Institute of Petrochemical Technology, No. 19 Qingyuan North Street, Huangcun Town, Daxing District, Beijing 102617, P. R. China
Wu Bo: Center of Engineering and Education, Beijing Institute of Petrochemical Technology, No. 19 Qingyuan North Street, Huangcun Town, Daxing District, Beijing 102617, P. R. China
Zhou Hai: Center of Engineering and Education, Beijing Institute of Petrochemical Technology, No. 19 Qingyuan North Street, Huangcun Town, Daxing District, Beijing 102617, P. R. China
Ning Cao: School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China
Mu-Sen Li: School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China

Surface Review and Letters (SRL), 2007, vol. 14, issue 03, 371-376

Abstract: Plasma-spraying parameters are of crucial importance to the fabrication of high-quality hydroxyapatite (HA) coating for biomedical use. In this paper, hydroxyapaptite was coated onto carbon fiber reinforced carbon composites (C/Ccomposites) by a plasma spraying method. The effect of stand-off distances on the microstructure, phase composition and shear strength of hydroxyapatite coatings was studied. X-ray diffraction (XRD) was used to characterize the phase composition and scanning electron microscopy (SEM) examined the morphology of the sprayed surface and polished cross-sections. The shear strength of the HA coatings–C/Csubstrates was detected on a RGD-5 electric tension machine. The interface of the HA coating–C/Ccomposites was also detected. Results showed that the extent of melting of particles increased with increasing stand-off distances, while the crystallinity of the HA decreased at a power level of 30 kW. Mechanical bonding plays a dominant role at the interface of the rough substrate and the deformed HA particles.

Keywords: Plasma-spraying; carbon fiber reinforced carbon composites; hydroxyapatite coating; stand-off distances (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0218625X07009633

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