Analysis of the sintering process of 316l – Hydroxyapatite composite biomaterials
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The 316L-hydroxyapatite biocomposites were produced by the powder metallurgy technology. The properties and microstructure of these materials are affected by the chemical composition of the powders mixture and the sintering temperature. The sintering temperature of 1240°C and hydroxyapatite addition in an amount of 3% of mass obtained the highest density and hardness and smaller open and closed porosity. Hydroxyapatite addition to austenitic stainless steel modified sintering behaviour. During heating the thermal decomposition of hydroxyapatite took place, which led to the formation of a CaO phase. However, phosphorus diffused into the austenitic matrix and was involved in the eutectic transformation.
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