【摘要】 采用Na2WO4和Na2SiO3电解液对2A12铝合金进行微弧氧化,研究了微弧氧化陶瓷膜表面形貌、截面组织、显微硬度及耐磨性等性能。结果表明,微弧氧化表面处理可以在2A12铝合金表面形成致密并与基体结合良好的陶瓷膜,Na2WO4溶液浓度对陶瓷膜颜色、表面形貌、致密度和显微硬度都有影响,但对于陶瓷膜成膜厚度没有显著影响。同时,在Na2SiO3电解液中添加Na2WO4将会导致陶瓷膜显微硬度的增加,而且随着与界面距离的增大,陶瓷膜显微硬度逐渐增加。更多还原

【Abstract】 Microarc oxidation(MAO) coating on 2A12 aluminum alloy was prepared in Na2SiO3 and Na2WO4 electrolytes,and the surface morphology,cross-sectional microstructure,wear resistance and micro-hardness and ceramic coatings have been studied in detail.The results show that the microarc oxidation surface treatment can form a dense ceramic coating on 2A12 aluminum alloy,which has good adhesion with aluminum alloy substrate.The concentration of Na2WO4 solution has significant influence on the color,surface morphology,density and micro-hardness of ceramic coating,but not much influence on the thickness of the ceramic coating.Additionally,the addition of Na2WO4 into the base Na2SiO3 electrolyte resulted in the increase of the micro-hardness of the ceramic coating,furthermore,the micro-hardness of the ceramic coating increased with the increasing distance from the interface.更多还原