Abstract

The crystallization behavior of mechanosynthesized amorphous tricalcium phosphate nanoparticles was investigated under thermal treatment. The main product of milling for 10h was nanostructured amorphous tricalcium phosphate. During the heating cycle, the crystallization of amorphous phase occurred and the fraction of crystalline phase reached a maximum after annealing at 1100°C for 1h. According to SEM and TEM images, the 10 h milled sample was composed of spheroidal particles with a mean particle size of about 20nm. After annealing at 1100°C, the microstructure showed a bimodal grain size distribution characterized by the presence of coarse grains with a mean particle size of around 2μm along with finer grains with an average particle size of about 300nm.

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