Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (50권1호 42-45)

High Temperature Oxidation Behavior of Mg-6%Al-1%Zn-1%CaO Alloys


Lee, Dong Bok;Kim, Min Jung;


School of Advanced Materials Science & Engineering, Sungkyunkwan University;

DOI : 10.5695/JKISE.2017.50.1.42

Abstract

The magnesium-base AZ61 alloy was cast while adding 1% CaO powder into the melt. It was hot extruded, and oxidized at $550-650^{circ}C$ in air in order to study its microstructure and oxidation behavior. Initially added CaO powder reacted with Al in the melt to $Al_2Ca$ particles that aligned along the extrusion direction. The formed $Al_2Ca$ particles increased the oxidation resistance through forming the superficial CaO scale at the upper part of the thin MgO oxide scale.

Keywords

Magnesium;Oxidation;CaO;$Al_2Ca$;Hot Extrusion;