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1132 |
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Bioactivity of microplasma sprayed yttria stabilized zirconia coating |
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Yongzhi Wu / Beijing University of Technology, China Zhuoxin Li/ Beijing University of Technology, China Dingyong He/ Beijing University of Technology, China Qiuying Zhao/ Beijing University of Technology, China Hui Li/ Beijing University of Technology, China |
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Yttria stabilized zirconia coatings were deposited onto Ti-6Al-4V substrate through a micro-plasma spray technique and incubated in the simulated body fluid for different periods of time (3?A7?A14?A28 days). The formation of apatite on their surface was investigated to evaluate the bioactivity of the coatings. Surface morphologies and structural changes in the coatings before and after immersion were analyzed by optical microscope, scanning electron microscopy, X-ray diffractometer. The calcium (Ca2+) concentration in the solutions was measured directly after the samples were removed, using inductively coupled plasma atomic emission spectrometer (ICP).Results showed that yttria stabilized zirconia coatings can be produced by micro-plasma spraying, though coatings contain a few of small unmelted particles; apatite can be formed on the coating soaked in SBF solution, which indicated that yttria stabilized zirconia possessed definite bioactivity. |