Abstract
Implantation of cerium ions into the surface of AZ31 magnesium alloys was performed with fluences of 5 × 10 16, 1 × 10 17 and 5 × 10 17 ions/cm 2, respectively. Auger electron spectrometry (AES), X-ray photoelectron spectroscopy (XPS) and glancing angle X-ray diffraction (GAXRD) were used to characterize the implanted surface. The results showed that after treatment a pre-oxidation layer with a duplex structure was formed. The outer layer was mainly composed of MgO, while the inner layer consisted of MgO, Ce 2O 3 and CeO 2. The influence of cerium implantation on the oxidation behavior of AZ31 magnesium alloys was investigated at 773 K in pure O 2 for 90 min. The results indicated that the oxidation resistance of the implanted sample was improved with optimal fluence. The corresponding mechanism of the oxidation behavior was also discussed.
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