The paper addresses a problem of dependence of microstructure and elastic properties of sintered hydroxyapatite on the processing parameters. Several specimens were sintered in conventional furnace at various temperatures. Elastic moduli were measured ultrasonically and information about microstructure was recovered from these data. It was obtained that the average shape of pores becomes more “round” as the sintering temperature increases. That leads to higher fracture toughness of the material since the stress concentration is reduced.
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