Magnesium alloy was treated by micro-arc oxidation with ultrasound and the discharge phenomenon was studied. The effect of ultrasound on the discharge life and the number of discharge charges was studied asing high sp...Magnesium alloy was treated by micro-arc oxidation with ultrasound and the discharge phenomenon was studied. The effect of ultrasound on the discharge life and the number of discharge charges was studied asing high speed photography technique. The results indicate that 60 W power ultrasound increases discharge life of single charge and the total number of discharge charges in one discharge period. The size of micro-pore increases and the number of cracks in coating significantly reduce. The dendritic area with a width of 15 μm in magnesium alloy forms during micro-arc oxidation process. Ultrasound eliminates the dendritic structures of micro-arc oxidation magnesium alloy.展开更多
基金This work was supported by the National Natural Science Foundation of China （ Grant No. 31070859, No. 31370979） , the Fundamental Research of Natural Scienee for Jiamusi Universities （Young Fund, Grant No. Lq2014-001 ） and Innovation Team Construclion Projects of Colleges and Universities in Heilongjiang Province （Biomaterials and its Surface Modification, Grant No. 2012TD010）.
文摘Magnesium alloy was treated by micro-arc oxidation with ultrasound and the discharge phenomenon was studied. The effect of ultrasound on the discharge life and the number of discharge charges was studied asing high speed photography technique. The results indicate that 60 W power ultrasound increases discharge life of single charge and the total number of discharge charges in one discharge period. The size of micro-pore increases and the number of cracks in coating significantly reduce. The dendritic area with a width of 15 μm in magnesium alloy forms during micro-arc oxidation process. Ultrasound eliminates the dendritic structures of micro-arc oxidation magnesium alloy.
