干摩擦条件下金刚石复合膜摩擦学性能

在干摩擦条件下利用 SRV磨损试验机比较了在硬质合金基体上金刚石薄膜、石墨 /金刚石复合膜以及硬质合金 3种试样的摩擦学性能。利用扫描电子显微镜观察了试样和磨痕的表面形貌。利用表面形貌仪测试了磨损体积。研究了振动频率对试样的摩擦学性能影响。结果表明 ,在干摩擦条件下 ,金刚石薄膜与石墨 /金刚石复合膜的摩擦学性能差别不大 ,二者的磨损机理均为微断裂磨损。在干摩擦条件下 ,高频时金刚石薄膜的耐磨性是硬质合金耐磨性的 8～ 10倍 ,其原因是硬质合金的磨损机理存在着从粘着磨损到微断裂磨损的转变

Tribological properties of diamond films and graphite/diamond composite films with dry friction

The tribological properties of diamond films, graphite/ diamond composite films and cemented carbides were compared using a SRV wear testing machine with dry friction. The surface morphologies of the specimens and the wear tracks were observed by scanning electron microscope (SEM) and the wear volumes on the specimens were measured by a profilometer. The influence of frequency on the tribological properties of these materials was also studied. The results showed that for dry friction, the friction coefficients and the wear volumes of graphite/diamond composite films were very close to that of diamond films. For dry friction, the main wear mechanisms of the diamond film and the graphite/diamond composite film were micro rupture wear. The wear resistance of the diamond film was almost ten times that of YG6 cemented carbide at a frequency of 60 Hz. The wear mechanism of cemented carbide to zirconia at higher frequency is no longer adhesive wear but micro rapture wear.