The effect of Y-ion implantation on the oxidation of AZ31 magnesium alloy

摘要

The beneficial effect of Y-ion implantation on the oxidation behavior of AZ31 magnesium alloy was investigated. Yttrium ions having energy of 90 keV were implanted with a concentration of 5 x 10~(17) ions/cm~2. Isothermal oxidation tests have been conducted at 773 K in pure O_2. The experimental results indicated that after treatment the oxidation resistance of AZ31 was significantly improved. AES, XRD and SEM revealed that the pre-oxidation layer could play an important role in further oxidation of the alloys. Finally, cyclic-oxidation test was performed at 773 K in air for 96 h. The implanted AZ31 showed an improved oxidation resistance. With longer oxidation time the beneficial effect of Y-ion implantation vanished gradually.