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| Abstract |
The bioactivity of TiH₂ as a starting material in the preparation of β-phase stabilized Ti alloys, remains largely unexplored. This paper examines the hydrogen impact on apatite formation on the TiH₂-...40Nb alloy’s surface. The TiH₂-40Nb alloy was synthesized using mechanical alloying and powder metallurgy techniques, including cold powder compaction and sintering process. The alloy's bioactivity was assessed by immersing samples in Hank's Balanced Salt Solution (HBSS) for 30 days, followed by characterization using weight gain analysis, pH measurement, and scanning electron microscopy (SEM). Ti-40Nb alloy served as a reference for comparison. The results demonstrated a significantly higher weight gain (3.37%) in TiH₂-40Nb alloy compared to Ti-40Nb alloy (1.99%). This enhanced apatite formation due to the emission of hydrogen from the alloy, which increased the pH from 7.4, creating a more favorable alkaline environment for apatite precipitation. The local pH observed for the Ti-40Nb alloy and TiH₂-40Nb alloy were 8.24 and 8.30, respectively. As a conclusion, the role of hydrogen in enhancing the apatite formation, suggesting that TiH₂-based alloys could offer a cost-effective and bioactive alternative for implant materials.show more
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p1025-1032