论文部分内容阅读
分别采用机械搅拌-直流电沉积方法、机械搅拌-脉冲电沉积方法和超声波振荡-脉冲电沉积方法制备Ni-ZrO_2复合镀层,利用扫描电镜、透射电镜和X射线衍射仪表征复合镀层的表面形貌和晶相结构,利用显微硬度计和摩擦磨损试验机检测复合镀层的显微硬度和耐磨性。结果表明:与机械搅拌-直流电沉积和机械搅拌-脉冲电沉积的复合镀层相比,超声波振荡-脉冲电沉积的复合镀层表面平整、致密,晶粒细小,平均晶粒尺寸为(50~100)nm;择优取向发生改变,在(220)晶面呈择优取向,而非(200)晶面;显微硬度明显提高,接近600HV;耐磨性改善,磨损形式为轻微磨粒磨损,磨损量降低,仅为2.29 mg。
Ni-ZrO 2 composite coating was prepared by mechanical agitation-DC deposition method, mechanical agitation-pulse electrodeposition method and ultrasonic oscillation-pulse electrodeposition respectively. The surface morphology of the composite coating was characterized by SEM, TEM and XRD. Crystal structure, the use of micro-hardness tester and friction and wear testing machine composite coating micro-hardness and wear resistance. The results show that the surface of composite coating by ultrasonic oscillation and pulse electrodeposition is smooth, dense and fine grains with average grain size of (50 ~ 100) compared with that of mechanical stirring - direct current deposition and mechanical stirring - pulsed electrodeposition. nm. The preferred orientation is changed. The preferred orientation is on the (220) plane rather than the (200) plane. The microhardness is significantly increased, approaching 600 HV. The wear resistance is improved. The wear pattern is slightly abrasive wear, , Only 2.29 mg.