Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (3): 441-444.doi: 10.3969/j.issn.1673-8225.2011.03.015

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A novel method for preparing adherent hydroxyapatite coating on carbon/carbon composite surface

Li Dong-mei1, Xiong Xin-bo2, Zou Chun-li2, Ma Chu-fan1   

  1. 1 Department of Prosthodontics, School of Stomatology, the Fourth Military Medical University of Chinese PLA, Xi’an  710032, Shaanxi Province, China
    2Shenzhen Key Laboratory of Special Functional Materials, Shenzhen  518060, Guangdong Province, China
  • Received:2010-10-08 Revised:2010-12-10 Online:2011-01-15 Published:2011-01-15
  • Contact: Xiong Xin-bo, Doctor, Associate professor, Shenzhen Key Laboratory of Special Functional Materials, Shenzhen 518060, Guangdong Province, China
  • About author:Li Dong-mei☆, Doctor, Lecturer, Department of Prosthodontics, School of Stomatology, the Fourth Military Medical University of Chinese PLA, Xi’an 710032, Shaanxi Province, China
  • Supported by:

    Science and Technology Program of Shaanxi Province, No. 2008K14-03*; the National Natural Science Foundation of China, No. 50702034*; Science and Technology Program of Shenzhen, No. PT200805200295A*

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Abstract:

BACKGROUND: At present, there are many methods for preparing hydroxyapatite (HA) coating on carbon/carbon composite surface, but the bonding strength between the prepared coating and the substrate is not high.
OBJECTIVE: To propose a novel method for preparing HA coating with high bonding strength on carbon/carbon composite surface.
METHODS: Firstly, monetite coating was deposited on carbon/carbon composite using induction heating technique, and then the monetite coating was converted to HA by hydrothermal method in ammonia solution. The morphology of the coating was observed under scanning electron microscopy, the critical load of HA coating was determined using scratch test, and shear strength was detected with extrusion method.
RESULTS AND CONCLUSION: Using induction heat deposition method, dense block anhydrous dicalcium phosphate coating with grain structure was prepared in the carbon/carbon composite surface, and then transformed into dense HA coating with good crystals by hydrothermal method. The critical load of HA coating is 13.31 N and shear strength is 47 MPa.

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