Micro-plasma sprayed zirconia reinforced hydroxyapatite composite coatings

作者：Li Zhuoxin^*; Wu Yongzhi; He Dingyong; Zhao Qiuying

来源：Transactions of the China Welding Institution, 2008, 29(6): 1-4.

• High temperature
• Hydroxyapatite composite
• Micro-plasmas
• Rapid cooling
• SBF solution
• Simulated body fluids
• X ray diffractometers
• Yttria-stabilized zirconias (YSZ)

Hydroxyapatite (HA) + yttria stabilized zirconia (YSZ) bio-composite coatings deposited onto Ti-6Al-4V substrate through a micro-plasma spray (MPS) technique were immersed in simulated body fluid (SBF) to investigate their behavior in vitro. The formation of apatite on their surface was investigated to evaluate the bioactivity of the coatings. Surface morphologies and structure in the coatings were analyzed by scanning electron microscopy (SEM), X-ray diffractometer (XRD). Results showed that composite coatings consist of primitive cubic phase ZrO2, a quantity of α-Ca3(PO4)2can be found because of the decomposition of HA at high temperature and the rapid cooling rate during MPS. Composite coatings contain some unmelted small ZrO2particles, though the HA melted well. Apatite can be formed on the coating soaked in SBF solution, which indicated that zirconia reinforced hydroxyapatite composite coatings possessed excellent bioactivity.

• 出版日期2008
• 单位北京大学