The Effect of Heat Treatment on the Properties of Titanium-50 Zirconium Alloy

Tzuh-Suan Yang ； Ker-Kong Chen ； Chun-Cheng Hung ； Jen-Chyan Wang ； Ting-Hsun Lan ； Yen-Hao Chang ； Kuan-Yu Chiu ； Je-Kang Du

《Journal of Prosthodontics and Implantology》 9卷2期 (2020/09) Pp. 1-4

https://doi.org/10.6926/JPI.202009_9(2).0001

摘要

Due to their excellent mechanical properties and biocompatibility, pure titanium and titanium alloys are widely used for clinical purposes. Zirconium, the biocompatible β-stabilizing element of titanium, can be added to titanium to provide a stable β-phase to improve the clinical applicability of titanium. Thereby, β-titanium alloy with a lower Young's modulus can be obtained. However, limited data is currently available on titanium-zirconium alloys. Therefore, in this study, we focused on how heat treatment influences the properties of titanium-50 zirconium alloys. The microstructure of the alloy was analyzed by X-Ray diffraction (XRD) and scanning electron microscopy (SEM), and the Young's modulus was measured. Under the as-cast state, the alloy can obtain a structure as the α'-phase acicular martensite. After high-temperature heat treatment, the alloy becomes wider and plate-like. The XRD data showed that, after long-term heat treatment at 800 °C, β-phase formation could be observed, with the lowest detected Young's modulus of 63.2 GPa. Therefore, compared to commercial materials, titanium-50 zirconium alloy displays less stress shielding effect after the heat treatment, ensuring its high application potential in implantable medical materials.

關鍵字

Titanium-50 Zirconium ； Heat treatment ； Young's modulus ； Microstructure analysis