시효처리에 따른 Ti-7Zr-xNb 합금의

Abstract

Cp Ti and Ti-based alloys have been widely used for biomedical applications due to their biocompatibility superiority, mechanical properties and corrosion resistance. However, when implanted into human body these metals are problematic because they do not show direct bonding with living bone. Therefore, the purpose of this study is to investigate the microstructure variation and corrosion characteristics of Ti-7Zr-xNb alloys. Two kinds of alloys containing Nb concentrations of 5 and 10 wt% were used to investigate the microstructure, corrosion resistance and others. The specimens were solution treatment in the β phase field of Ti alloy and followed by water quenching(WQ). The samples for optical metallography, scanning electron microscopy were prepared using standard techniques and etched with Kroll's reagent. X-ray diffraction(XRD) analysis for specimens were performed using a philips 3121 diffractomenter. Effect of alloy composition on the corrosion resistance was studied by anodic polarization test. From the results of anodic polarization behavior in Ti-7Zr-xNb alloys, it was found that the corrosion resistance was increased with increasing Nb content.