探讨了自支撑金刚石厚膜片的晶体生长模型，并依据模型通过热丝化学气相沉积( HFCVD) 法制备了厚度为0． 6mm 的自支撑金刚石厚膜片． 采用球－ 盘式摩擦磨损试验机进行摩擦学实验，借助扫描电镜、拉曼光谱仪等研究了自支撑金刚石厚膜片分别与钢球、陶瓷球以及铝球组成对偶副时的摩擦学特性． 结果表明: 铝球做对偶球时平均摩擦系数最大，在对磨初始阶段很快出现了金属转移层; 陶瓷球做对偶球时摩擦系数最小，球表面物质的微观形貌呈微细碎屑状分布; 对磨后自支撑金刚石厚膜片的磨损量非常小，是良好的耐磨材料．

A crystal growth model of freestanding thick diamond film was discussed,and on the basis of this model,a self-standing thick diamond film slice of a thickness of about 0.6mm was prepared by means of HFCVD ( Hot-Filament- Assisted Chemical Vapor Deposition) method.Then,a friction experiment of the film slice was conducted on a ball-disc tribometer,and the tribological properties of the film slices respectively with a steel ball,a ceramic ball and an aluminum ball as the friction pair were characterized by using a SEM and a Raman spectrometer.The results show that ( 1) when the friction pair is an aluminum ball,average friction coefficient is the biggest and metal transfer layer appears very fast in the initial stage of grinding; ( 2) when the friction pair is a ceramic ball,the average friction coefficient is the smallest and the ball surface material is in a fine clastic distribution; and ( 3) the wear of the film slice is very small after the experiment,which means that the film slice is a good wear-resistant material.