摘要
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-ZrO2 composite coatings were prepared using mechanical stirring—direct current electrodeposition method,mechanical stirring—pulse current electrodeposition method and ultrasonic oscillation—pulse current electrodeposition method,respectively. The surface morphology and phase structure of composite coatings were characterized by scanning electron microscope,transmission electron microscope and X-ray diffracmeter,and the micro-hardness and wear resistance of composite coatings were tested by microhardness tester and friction wear testing machine. Results show that,compared with the composite coating prepared using mechanical stirring—direct current electrodeposition method and the composite coating prepared using mechanical stirring—pulse current electrodeposition method,the composite coating prepared using ultrasonic oscillation—pulse current electrodeposition method has smooth surface and compact structure,the average grain size is（50-100）nm. The preferred orientation is changed,and presents preferred orientation at（220）crystal face,while not at（200）crystal face. Microhardness is improved significantly,approaches 600 HV. The wear resistance is improved,the wear form is mild abrasive wear,and the wear loss is lowered,just 2.29 mg.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2017年第6期79-82,共4页
Ordnance Material Science and Engineering
