Synthesis and characterization of Si-substituted hydroxyapatite bioactive coating for SiC-coated carbon/carbon composites

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• 作者：Li Kezhi ; ^{likezhi@nwpu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Guo Qian ; Zhang Leilei ; ^{zhangleilei@nwpu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Zhang Yulei ; Liu Shoujie ; Guo Kebing ; Li Shaoxian
• 关键词：Silicon-substituted hydroxyapatite ; Electrodeposition ; Coating ; Carbon/carbon composites
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1410-1414
• 全文大小：1292 K

文摘

A silicon-substituted hydroxyapatite (Si-HA) coating for SiC-coated carbon/carbon composites has been prepared by pack cementation and electrochemical deposition. The morphology, microstructure and in-vitro bioactivity of the Si-HA/SiC double-layer coatings were investigated. Results showed that the SiC inner-layer exhibited high crystallinity. The Si-HA outer-layer had a smaller crystal size than pure hydroxyapatite (HA). Simulated body fluid (SBF) immersion tests showed that the Si-HA coating was uniformly covered by a layer of apatite after 7 days of immersion, while the apatite layer formed on the HA coating was inhomogeneous. This work demonstrates that the Si-HA coating may have better bioactivity than a HA coating and shows promise for the potential application as bioactive coating.