目的 增强聚氨酯橡胶的耐磨性能。方法 选用四氯乙烯作为溶塑剂对聚氨酯橡胶进行预处理，再采用阴极放电等离子技术进行类金刚石（DLC）薄膜的镀制。通过扫描电子显微镜、拉曼光谱仪对制备的试样表面形貌和组成进行观察、表征。采用摩擦试验机对试样在干摩擦条件下的摩擦磨损行为进行分析，并观察试样的磨痕形貌。结果 随着四氯乙烯超声处理温度和时间的增加，基体表面原有条纹的深度呈现先增大后减小的趋势，镀制薄膜后，试样表面平整，且粗糙度逐渐降低；薄膜组成从非晶态碳结构，逐渐转变为金刚石相与石墨相混杂的典型类金刚石结构。在干摩擦过程中，镀膜试样的摩擦系数比未镀膜试样降低了40%以上，随着超声处理温度和时间的增加，镀膜试样的摩擦系数和磨损量均呈现先减小后增大的趋势，其中在50 ℃四氯乙烯超声处理15 min后，镀膜试样4的摩擦系数和磨损量最小。结论 四氯乙烯超声处理有助于改善聚氨酯表面DLC薄膜的摩擦性能，合适的四氯乙烯超声处理温度为50 ℃，合适的超声处理时间为15 min。

The work aims to improve the wear resistance of polyurethane (PU) rubber. Diamond-like carbon (DLC) films were deposited on the pretreated PU rubbers through cathodic discharge plasma method with tetrachloroethylene as soluble plastic agent. Scanning electron microscopy and Raman spectroscopy were taken to observe and characterize the surface morphologies and compositions of the deposited films, respectively. The tribological behavior of specimens was investigated with friction testing machine under dry sliding condition and wear morphology was observed. The depth of original stripes on the substrate surface increased firstly and then decreased with the increase of temperature and time of ultrasonic treatment of tetrachloroethylene. The surface of the coated specimen was flat and the roughness decreased gradually. With the increase of ultrasonic treatment temperature and time, the coating composition changed from amorphous carbon structure to typical diamond-like structure with diamond phase mixed with graphite phase. The coefficients of friction (CoF) of coated rubbers were 40% lower than that of uncoated rubber under dry friction. With the increase of temperature and time of ultrasonic treatment under dry friction, the friction coefficient and wear amount of coated specimen firstly decreased and then increased. Specifically, both of the CoF and mass loss of coated specimen 4 were the smallest after treatment for 15 min with tetrachloroethylene at 50 ℃. The ultrasonic treatment with tetrachloroethylene can improve the wear resistance of DLC films deposited on PU rubbers. The most suitable temperature and time of ultrasonic treatment with tetrachloroethylene are 50 ℃ and 15 minutes.