抄録
Magnesium alloys have been anticipated as an ecologically sound application in industrial fields because of their light weight, recyclability, and high specific strength. Inferior wear resistance of magnesium alloys, however, hinders expansion of their application.
The authors have improved tribological characteristics of magnesium alloys through application of diamond like carbon (DLC) coating on their surfaces. Results show that a DLC coating decreases the fatigue strength of rolled magnesium alloys.
This paper describes experimental test results of friction and fatigue for DLC coated magnesium alloy (AZ31B) in combination with fine particle bombardment (FPB) surface treatment. The DLC/FPB combined surface treatment enables selection of an optimum friction coefficient and improves the fatigue strength of the rolled magnesium alloy. Microscopic fractography studies of fracture surfaces of tested materials show that microcracks on coating surfaces affect their fatigue strength. Microdimples formed by DLC/FPB surface treatment inhibit crack growth and improve the fatigue strength of DLC-coated magnesium alloys.
