Effect of surface texturing on friction reduction between ceramic and steel materials under lubricated sliding contact
Effect of surface texturing on friction reduction between ceramic and steel materials under lubricated sliding contact
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DOI：
10.1016/s0043-1648(03)00004-8
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发表时间：
2003-02-01
期刊：
影响因子：
5
通讯作者：
Yasuda, Y
中科院分区：
文献类型：
--
作者：
Wakuda, M;Yamauchi, Y;Yasuda, Y
最近发现，摩擦表面上的受控孔隙率有助于减少滑动接触界面的摩擦。边界润滑条件下表面纹理的推测效果之一是微凹坑可以充当储液器并在促进润滑膜的保留方面发挥作用。本文验证了微凹坑对与硬化钢配合的氮化硅陶瓷的摩擦性能的影响。针对各种表面形态进行了销盘测试，模拟圆柱面和平面之间的接触，其中凹坑被加工成不同尺寸、密度和几何形状。与没有纹理的研磨光滑表面相比，一些样品成功地将摩擦系数从 0.12 降低到 0.10。研究发现，摩擦学特性很大程度上取决于微凹坑的尺寸和密度，而无论是圆形还是有角的轮廓，凹坑形状都不会显着影响摩擦系数。建议凹坑尺寸约为 100 微米，密度为 5-20%。 (C) 2003 Elsevier Science B.V. 保留所有权利。
It has recently been identified that controlled porosity on a tribological surface can contribute to friction reduction at sliding contact interfaces. One of the presumed effects of surface texturing under boundary lubrication conditions is that micro-dimples can act as fluid reservoirs and play a role in promoting the retention of a lubricating film. The present paper verifies the effect of micro-dimples on the frictional properties of a silicon nitride ceramic mated with hardened steel. Pin-on-disk tests modeling the contact between cylindrical and planar faces were carried out for a variety of surface morphologies in which dimples were pattern machined with different size, density, and geometry. Compared to a lapped smooth surface without texturing, some samples successfully realized reductions in friction coefficient from 0.12 to 0.10. It was found that the tribological characteristics depended greatly on the size and density of the micro-dimples, whilst the dimple shape did not significantly affect the friction coefficient regardless of rounded or angular profiles. A dimple size of approximately 100 mum at a density of 5-20% is recommended. (C) 2003 Elsevier Science B.V. All rights reserved.