Abstract
Bioactive ceramics attracts attentions as materials of the bone implant, because of their high biocompatibility. For example, hydroxyapatite (HA) has bone-bonding ability, and β-tricalcium phosphate (P-TCP) has a high bioresorbability in body environment. In this study, HA/β-TCP composites with different content of β-TCP (0,10,20,30wt%) were prepared by wet mixing of HA and β-TCP powder, compaction of the powders and sintering. Pressureless sintering and spark plasma sintering were employed in this study. To improve sinterability of HA/β-TCP composites, the effect of additive of MgO was investigated. It was found that MgO improved sinterability of only P-TCP. Spark plasma sintering improved sinterability compared to pressureless sintering. As a result of X-ray powder diffraction measurement, it was found that MgO inhibited the change of β-TCP structure in case of pressureless sintering, but not in case of spark plasma sintering.
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