电射流法沉积的ZrO_(2)织构化表面及其摩擦磨损特性

Preparation and Tribological Properties of ZrO_(2) Micro-texture Surface Fabricated by Electrohydrodynamic Atomization

精密器械中的微摩擦零件的增摩需求逐渐被重视,电射流沉积法可以低成本制备出增摩表面。利用溶胶凝胶法制作ZrO_(2)溶液,通过电射流沉积技术结合掩膜板在316L不锈钢表面制备具有仿生图案的二氧化锆(ZrO_(2))织构化表面,测试织构化表面的亲水性和不同加载力下的摩擦磨损性能,并与相同试验条件下的光滑基体、薄膜作对比。结果表明:利用电射流沉积技术通过掩膜板制备织构化增摩表面的方法简单可行,织构化表面与基体和薄膜相比亲水性更弱,与光滑基体相比在小加载力下其摩擦因数增加约70%,磨损率下降约50%,有明显的增摩、耐磨效果。电射流法借助掩膜板沉积的ZrO_(2)织构化表面可为微摩擦零件表面的增摩耐磨提供一种新方式。

The increasing demand of micro-friction parts in the precision machining is gradually valued,and it can be satisfied by electrohydrodynamic atomization.A zirconium dioxide(ZrO_(2))film with a bionic micro-texture pattern is prepared on the surface of 316 L stainless steel by electrohydrodynamic atomization with a mask.The ZrO_(2)solution is prepared by sol-gel method.Then the hydrophilicity and tribological property of ZrO_(2)micro-texture surface are evaluated.The results are compared with the smooth substrate and the ZrO_(2)films which has the same number of layers under the same test conditions.It is identified that the method using the electrohydrodynamic jet deposition to prepare the ZrO_(2)micro-texture surface with the mask is simple and feasible.And the prepared ZrO_(2)micro-texture surface shows its weak hydrophilicity.Compared with the smooth substrate,the micro-texture surface has remarkable friction-increasing effects.The friction coefficient increases by~70%,and the wear rate decreases by~50%under small loading.Thus,the ZrO_(2)micro-texture surface made by electrohydrodynamic atomization with mask is a new way to be used as a friction-increasing surface of the micro-friction parts.