Effect of Titanium Nitride on Properties of Hydroxyapatite-Based Composites for Biomedical Applications

Abstract:

Hydroxyapatite (HA) is widely used in biomedical applications as an artificial bone due to its excellent biocompatibility. In this work, the high purity HA powders were synthesized from natural bovine bone by a sequence of thermal processes. Then, the HA-based composites containing titanium nitride (TiN) at various compositions were fabricated by a solid-state reaction mixed oxide method. The green compacts were subsequently pressed and then sintered at 1200-1250°C for 2 hours. Surface morphology, compositions and phases of the as-prepared HA-based composites were analyzed by means of scanning electron microscopy (SEM) utilizing energy dispersive X-ray spectroscopy (EDS) and X-ray diffractometry (XRD), respectively. The results showed that the physical and mechanical properties and also the aesthetic performance of HA-TiN composites were substantially varied through the changes in the microstructure and volume fraction of the reinforcing particulates. The maximum hardness value of 3.5 GPa was obtained for HA-2wt%TiN ceramic sintered at 1250°C.

• Periodical: Applied Mechanics and Materials (Volume 804)
• Pages: 139-142
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.804.139
• Online since: October 2015
• Authors: Komsanti Chokethawai*, Gobwut Rujijanagul, Tawee Tunkasiri
• Keywords: Biomedical Applications, Hydroxyapatite, Mechanical Alloying

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