纳米SiO_2对纯镁超声微弧氧化涂层组织结构及性能的影响  

Effect of n-SiO_2 on microstructure and mechanical properties of the coatings formed on pure magnesium by ultrasonic-micro-arc oxidation

作　　者：马臣[1] 高燕[1] 李慕勤[1] 李明[1] 王晶彦[1] 张德秋[1] 

机构地区：[1]佳木斯大学黑龙江省高校生物医学材料重点实验室,佳木斯154007

出　　处：《中国体视学与图像分析》2014年第1期50-56,共7页Chinese Journal of Stereology and Image Analysis

基　　金：国家自然科学基金(31070859;31370979);黑龙江研究生创新基金(YJSCX2012-014JD);黑龙江省自然科学基金重点项目(ZD201008);黑龙江省高校创新团队建设计划项目(2012TD010)

摘　　要：采用超声微弧氧化技术,在硅酸盐电解液中添加n-SiO2,研究不同添加量对纯镁生物涂层组织结构及性能的影响。分析涂层形貌及相结构,测定涂层厚度、涂层结合力、摩擦系数、电化学腐蚀性能。结果表明:添加n-SiO2粒子,涂层表面形成更多均匀细小孔,形成了含n-SiO2粒子涂层,随着n-SiO2含量从0 g/L增加到7.5 g/L,涂层主相MgO向MgSiO3变化,涂层Si含量增多,涂层厚度从10.26μm增加到13.32μm,结合强度从4.9 N增大到7.4 N,摩擦系数从1.1下降到0.6。其中,添加n-SiO2含量为7.5 g/L时,超声微弧氧化涂层与基体有最高结合强度,且耐摩擦系数最小,耐蚀性最好。Ultrasonic-micro-arc oxidation technique was used to fabricate nano-biocoatings on the surface of pure magnesium with silicate electrolyte solution be structure and properties of the coatings were studied ing The added with n-Si02, and its influence on micro- morphology and phase structure of the coatings were analyzed, and the thickness, coating binding force, friction coefficient, corrosion current and corro- sion potential were measured. Results showed that the surface of the coatings formed more uniform micro-pores after adding n-SiOa particles in silicate electrolyte solution, and micro-arc oxidation coating ning n-SiO2 particles was obtained. With the increase of n-SiO2 content from 0 g/L to 7.5 g/L, contai- e main phase of the coatings changed from MgO to MgSiO3. With the increasing of silicon content in the coatings, the thickness was increased from 10.26μm to 13.32μm, the binding force was increased from 4.9 N to 7.4 N of the coatings, and friction coefficient was decreased from 1.1 to 0.6. When the content of n-SiO2 added in silicate electrolyte solution was 7.5 g/L,the micro-arc oxidation coatings had the highest binding strength with substrate and the minimum friction coefficient, and the best wear resistance

关 键 词：纯镁 微弧氧化 纳米二氧化硅 组织结构 耐蚀性 

分 类 号：R318.08[医药卫生—生物医学工程]