Formation mechanism and surface characterization of ceramic composite coatings on pure titanium prepared by micro-arc oxidation in electrolytes containing nanoparticles
Formation mechanism and surface characterization of ceramic composite coatings on pure titanium prepared by micro-arc oxidation in electrolytes containing nanoparticles
复制标题
DOI：
10.1016/j.surfcoat.2016.03.013
复制
发表时间：
2016-04
影响因子：
5.4
通讯作者：
M. Shokouhfar;S. Allahkaram
中科院分区：
文献类型：
--
作者：
M. Shokouhfar;S. Allahkaram
本文研究了纳米颗粒在钛合金微弧氧化陶瓷复合膜中的作用。技术在电解质含有纳米粒子和修改表面特性。为了实现这一目标，将SiC和SiO2纳米颗粒（分别作为主颗粒和辅助颗粒）添加到铝酸盐基电解质和M.A.O.使用脉冲电源在恒定电压状态下进行工艺。最后，研究了纳米粒子的加入对涂层的电流-时间响应、表面形貌、厚度、化学组成和相组成的影响。所获得的结果表明，向电解质中添加纳米颗粒（7.5g/l）对样品的电流-时间响应和涂层厚度没有影响。但是，它导致M.A.O.的微孔尺寸和表面粗糙度的减小。镀层.还得出结论，纳米粒子结合到涂层的电泳力和微火花的帮助下。
The aim of this work is to study how nanoparticles incorporate into the prepared ceramic composite coatings on titanium by micro-arc oxidation (M.A.O.) technique in electrolytes containing nanoparticles and modify the surface characteristics. In order to achieve this goal, SiC and SiO2nanoparticles (as main and auxiliary particles, respectively) were added to aluminate based electrolytes and M.A.O. process was performed under constant voltage regime using a pulsed power supply. Finally, the effect of addition of nanoparticles on current-time responses, surface morphology, thickness, chemical and phase composition of coatings were investigated. The obtained results showed that addition of nanoparticles (7.5 g/l) to the electrolytes, had no effect on the current-time responses and coating thickness of samples. However it caused a reduction in the size of micro-pores and surface roughness of M.A.O. coatings. It was also concluded that nanoparticles incorporate into the coating with the aid of both electrophoretic force and micro-sparks.