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KMID : 0362120010230010055
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Journal of Technologic Dentistry
2001 Volume.23 No. 1 p.55 ~ p.64
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Microstructure and Corrosion Resistance of Ti-15Sn-4Nb Alloy with Hf Adding Element
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Lee Doh-Jae
Lee Kyung-Ku
Cho Kyu-Zong
Yoon Taek-Rim
Park Hyo-Byeong
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Abstract
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This study is focusing on the improvement of problems of Ti-6Al-4V alloy. A new Ti based alloy, Ti-15Sn-4Nb, have designed to examine any possibility of improving the mechanical properties and biocompatibility. Specimens of Ti alloys were melted in vacuum arc furnace and homogenized at for 24h. All specimens were solution treated at and aged at for 10h. The corrosion resistance of Ti alloys was evaluated by potentiodynamic polarization test and immersion test inl%Lactic acid solutions. Ti-15Sn-4Nb system alloys showed Widmanstatten microstructure after solution treatment which is typical microstructure of type Ti alloys. Analysing the corrosion resistance of Ti alloys, it was concluded that the passive films of Ti-15Sn-4Nb system alloys are more stable than that of Ti-6Al-4V alloys. Also, the corrosion resistance of Ti-15Sn-4Nb system alloys was improved with adding elements, Hf. It was analysed that the passive film of the Ti-15Sn-4Nb alloy which was formed in air atmosphere was consisted of TiO2, SnO and NbO through X-ray photoelectron spectroscopy(XPS) analysis.
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KEYWORD
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Corrosion resistance, system, alloy, Hf, Ti-15Sn-4Nb
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