Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (37권1호 58-63)

Effects of Nb Addition on Microstructure and Oxidation Behavior of Ti Alloy

Nb이 첨가된 Ti합금의 미세 조직 및 산화 거동

이도재;이광민;이경구;박범수;김수학;전충극;윤계림;

전남대학교 공과대학 금속공학과;㈜금강기건;

Abstract

The oxidation behavior of Ti-Nb alloys was studied in dry atmosphere. After vacuum arc melting and hot rolling treatment, Ti-Nb alloys were oxidized at $450^{circ}C$∼$750^{circ}C$. The oxidation behaviors between matrix and oxide scale were analyzed by SEM, XPS and XRD. Ti-Nb alloys had higher oxidation resistance than pure Ti at $750^{circ}C$. XPS analysis of oxide film revealed that $TiO_2$ oxide was formed on the top of surface. The weight gains during the oxidation increase rapidly at temperature above $600^{circ}C$ which obey the parabolic law.

Keywords

Titanium;Niobium;Oxidation;Biomaterials;Microstructure;