Plasma spraying of zirconia-reinforced hydroxyapatite composite coatings on titanium Part I Phase, microstructure and bonding strength

E. Chang, W. J. Chang, B. C. Wang, C. Y. Yang

研究成果: Article同行評審

100 引文 斯高帕斯(Scopus)

摘要

Plasma-sprayed hydroxyapatite (HA) coatings applied to metal substrates can induce a direct chemical bond with bone and hence achieve biological fixation of the implant. However, the poor bonding strength between HA and substrate has been of concern to orthopaedists. In this study, two submicrometre ZrO2 powders stabilized with both 3 and 8 mol% Y2O3 (TZ3Y and TZ8Y, respectively) were incorporated in a plasma-sprayed HA coating on Ti-6Al-4V substrate to investigate the change in phase, microstructure and bonding strength. The results show that ZrO2 composite coatings contain more unmelted particles and greater porosity. During plasma spraying, ZrO2 reacts with the CaO in HA to form CaZrO3 and accelerates HA decomposition to α-TCP and Ca4P2O9. Nevertheless, bonding strength increases with increase of ZrO2 content in the range 0 to 10 wt% studied. The higher Y2O3-containing TZ8Y apparently exerts a greater strengthening effect than the lower Y2O3-containing TZ3Y.

原文English
頁(從 - 到)193-200
頁數8
期刊Journal of Materials Science: Materials in Medicine
8
發行號4
DOIs
出版狀態Published - 1997 一月 1

All Science Journal Classification (ASJC) codes

  • 生物物理學
  • 生物工程
  • 生物材料
  • 生物醫學工程

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