Chiang Mai Journal of Science

     In the present work, the characteristic of β-tricalcium phosphate (β-TCP) powder was investigated for its film coating on a Ti6Al4V metallic biomaterial. The β-TCP powder was synthesized by a solid-state reaction technique at different temperatures. The β-TCP formed at temperatures 900-1000 ^oC, while α-tricalcium phosphate (α-TCP) was occurred at higher temperatures (≥1000 ^oC). Crystallite size increased with increasing temperature, but it decreased at temperatures higher than 1000 ^oC due to the formation of α-TCP. Furthermore, the amount of α-TCP phase increased with temperature. However, maximum crystallite size and density values were found for the 1000 ^oC powder. The 1000 ^oC powder was coated on a titanium alloy (Ti6Al4V) by a dip coating technique. The coated surface presented a uniform grain with an average grain size of 3.21 μm. Bioactivity testing of the coated samples indicated that they had good bioactivity. The results indicate the possibility of developing the samples for biomedical applications.