CAJ | 학술논문

通过向电解液中添加纳米二氧化硅颗粒(n-SiO_2),经微弧氧化,在7A52铝合金表面制备n-SiO_2复合陶瓷层,研究n-SiO_2复合处理对陶瓷层孔隙率及性能的影响.结果表明,经n-SiO_2复合处理后,陶瓷层孔隙尺寸减小,孔隙率降低,致密性提高,因而陶瓷层显微硬度和抗盐雾腐蚀性能显著提高.n-SiO_2在放电通道处沉积是陶瓷层致密性提高的主要原因.
통과향전해액중첨가납미이양화규과립(n-SiO_2),경미호양화,재7A52려합금표면제비n-SiO_2복합도자층,연구n-SiO_2복합처리대도자층공극솔급성능적영향.결과표명,경n-SiO_2복합처리후,도자층공극척촌감소,공극솔강저,치밀성제고,인이도자층현미경도화항염무부식성능현저제고.n-SiO_2재방전통도처침적시도자층치밀성제고적주요원인.
Ceramic coatings incorporated with SiO_2 nanoparticles were fabricated on 7A52 aluminum alloy during micro-arc oxidation by mixing SiO_2 nanoparticles into the electrolyte. The porosity and properties of the ceramic coatings were investigated. The results show that coatings embedded with SiO_2 nanoparticles exhibit lower porosity and improved compactness, which lead to higher microhardness and better corrosion resistance. The enhancement of compactness can be attributed to SiO_2 nanoparticles deposited in discharge pores during the micro-arc oxidation process.