Abstract
In the present research work, a new range of nano-porous β-type Ti-Nb-Ta-Zr-HaP alloys was successfully fabricated by a powder mechanical alloying and Spark Plasma Sintering (SPS) technique. The effect of HaP on the microstructure and mechanical properties were studied. The microstructure, surface topography, and element composition of the Ti-Nb-Ta-Zr-HaP alloy was investigated using optical microscope, field-emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The micro-hardness of the specimens was measured on a Vickers hardness tester. The mmicrostructure examination of the compact reveled that the alloys distinctly shows the primary grain boundaries along with secondary grain boundary. It was observed that complex reactions between HA and alloy elements occurred during the sintering process of Ti-28Nb-7Ta-5Zr-10Hap alloy and biocompatible phases [Ca3(PO4)2, CaZrO3, Nb8P5, CaO, TiP, Nb4O5, and TiO2] were generated in the compact, which is beneficial to form apatite and improved the bioactivity of the alloy for osseiointegartion. The fabricated Ti-28Nb-7Ta-5Zr-10Hap alloy exhibits maximum micro-hardness (∼537 HV), which is very high value as compared to the alloys reported in literature. Based on these above observations, it is expected that the as-fabricated β-type Ti alloy (Ti-28Nb-7Ta-5Zr-10Hap) is suggested for biomedical applications as a material for the production of dental and orthopaedic implants
Published Version
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