Abstract
The effect of pressureless sintering on the properties of magnesium orthosilicate-hydroxyapatite (MO-HA) ceramic has been studied. The amount of MO composition in the green body was varied from 10wt% to 50wt% through mechanical ball milling and was subsequently sintered at varying temperatures in air atmosphere from 1000°C to 1300°C for 2h. The magnesium orthosilicate phase was stable during sintering but the hydroxyapatite phase decomposed to tricalcium phosphate. The MO-HA composites generally exhibited lower mechanical properties across all the investigated composition. Nevertheless, a high fracture toughness of 2.5 MPam1/2 was recorded for sintered body that contained 20wt% MO. This finding indicates the potential of this ceramic composite to be used for biomedical applications.
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