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论文类型：期刊论文

发表时间：2013-07-15

发表刊物：18th International Conference on Ion Beam Modifications of Materials (IBMM)

收录刊物：SCIE、EI、CPCI-S

卷号：307

页面范围：107-110

ISSN号：0168-583X

关键字：High-intensity pulsed ion beam; Microarc oxidation; Surface roughness; Contact angle; Magnesium alloy

摘要：Micro-arc oxidation (MAO) films on AZ31 magnesium alloy were modified by high-intensity pulsed ion beam (HIPIB) irradiation with ion energy of 300 keV at 200 A/cm(2) with up to 10 shots. Scanning electron microscopy, X-ray diffractometry and micro-hardness testers were used to characterize the surface properties of the irradiated MAO films. The thickness of remelted layer increased and then decreased, and the maximal value of 10 mu m was obtained at 200 A/cm(2) with 5 shots. The phase structure of the ablated surface still consisted of Mg2SiO4 and MgO, which are the same as that of the original ones. Surface roughness of the ablated surface increased and then decreased with the increase of shot number. The surface roughness for the original MAO film is about 2.10 mu m, it decreased to 1.18 mu m with 1 shot irradiation and then increased to 4.13 mu m with irradiation shots up to 10. Correspondingly, the surface energy of the ablated surface augmented, resulting in the tedious decrease of static contact angle from 145.9 degrees for original film to 49.7 degrees for the film with 10 shots. The ablation modification enhanced the continuity and compaction of the MAO films on AZ31 magnesium alloy. (C) 2013 Elsevier B.V. All rights reserved.