In situ synthesis and fabrication of tricalcium phosphate bioceramic coating on commercially pure titanium by laser rapid forming
✍ Scribed by Jiang Hu; Zhongyi Wang; Taihong Guan; Yang Gao; Xiaowei Lv; Xin Lin; Chak-yin Tang; Bo Gao
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 531 KB
- Volume
- 204
- Category
- Article
- ISSN
- 0257-8972
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✦ Synopsis
Titanium possesses good mechanical property, but a lack of bioactivity. Bioceramic is usually used to coat the surface of a titanium implant to enhance its bioactivity. Therefore, it is important for the coating to have a high bonding strength to the titanium substrate and contain bioactive phases. In this work, CaCO 3 and CaHPO 4 •2H 2 O powders were used to fabricate a bioceramic coating on commercially pure titanium (cp-Ti) by the laser rapid forming (LRF) technique. The phase composition of the coating contained 95 wt.% of β-TCP and 5 wt.% of α-TCP. Three layers were found in the coating: a ceramic layer, a transitional layer, and the substrate layer. In the transitional layer, interpenetration of phases was observed. The bonding strength between the coating and the cp-Ti substrate was in excess of 40.17 MPa. In addition, the elastic modulus and the micro-hardness of the coating were 117.61 GPa and 431.2 HV 0.1 , respectively. Furthermore, the static immersion test has confirmed that the coating not only prevented the corrosion of cp-Ti, but also induced the redeposition of β-TCP in synthetic saliva.