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BEHAVIOR OF PLASMA-SPRAYED HYDROXYAPATITE COATINGS ONTO CARBON/CARBON COMPOSITES IN SIMULATED BODY FLUID

Center of Engineering and Education, Beijing Institute of Petrochemical Technology, No. 19 Qingyuan North Street, Huangcun Town, Daxing District, Beijing, 102617, P. R. China

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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

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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

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NING CAO

School of Materials Science and Engineering, Shandong, University, Jinan 250061, P. R. China

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, and

MU-SEN LI

School of Materials Science and Engineering, Shandong, University, Jinan 250061, P. R. China

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https://doi.org/10.1142/S0218625X07010640Cited by:3 (Source: Crossref)

Abstract

Two types of hydroxyapatite (HA) coatings onto carbon/carbon composite (C/C composites) substrates, deposited by plasma spraying technique, were immersed in a simulated body fluid (SBF) in order to determine their behavior in conditions similar to the human blood plasma. Calcium ion concentration, pH value, microstructure, and phase compositions were analyzed. Results demonstrated that both the crystal Ca–P phases or the amorphous HA do dissolve slightly, and the dissolution of CaO phases in SBF was evident after 1 day of soaking. The calcium-ion concentration was decreased and the pH value of SBF was increased with the increasing of the immersing time. The precipitation was mainly composed of HA, which was verified by X-ray diffraction (XRD) and electron-probe microanalyzer.

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