不同纳米WS2含量Ni-P-Ti N-WS_(2)复合化学镀层的制备及其摩擦学性能  

Preparation and Tribological Properties of Ni-P-TiN-WS_(2) Electroless Composite Coatings with Various Contents of Nano-WS_(2)

作　　者：杨芳儿 兰翔刘斌 沈淑康 黄寅迪 郑晓华 YANG Fanger;LAN Xiangliubin;SHEN Shukang;HUANG Yindi;ZHENG Xiaohua(College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Institute of Remote Sensing Satellite,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]浙江工业大学材料科学与工程学院,杭州310014 [2]中国空间技术研究院遥感卫星总体部,北京100094

出　　处：《中国表面工程》2022年第1期183-190,共8页China Surface Engineering

基　　金：浙江省重点研发计划(2019C01088);大学生创新创业训练计划基金(202110337022)资助项目。

摘　　要：Ni-P-TiN化学复合镀层具有比Ni-P镀层更高的硬度和耐磨性,但其表面粗糙度大,与对偶件之间的摩擦因数高,应用潜力受到限制。通过在化学镀液中添加不同用量的纳米WS_(2)颗粒和固定用量的TiN颗粒,在低碳钢表面制备Ni-P-TiN-WS_(2)复合镀层。采用X射线能谱仪(EDS)、扫描电子显微镜(SEM)和X射线衍射仪(XRD)对镀层的化学成分(质量分数)、表面形貌及微观结构进行表征,并利用球盘式摩擦磨损试验机测试复合镀层的摩擦磨损性能。结果表明:纳米WS_(2)颗粒与纳米TiN颗粒的共沉积可使镀层表面更加致密、平整。随着镀液中纳米WS_(2)用量的增加,复合镀层的硬度先减小后增大,与氮化硅陶瓷球的摩擦因数则先升后降,磨损率显著下降,耐磨性增强。镀液中纳米WS_(2)粉末的用量为2.5 g/L时复合镀层的摩擦学性能最佳。纳米WS_(2)颗粒的加入及用量优化可显著改善复合镀层的综合性能,可为发展高耐磨低摩擦因数的先进涂层提供借鉴。Ni-P-TiN electroless coating has higher hardness and better wear resistance than Ni-P electroless coating,however,its large roughness and high friction factor with the counterparts restrict its application potential.Ni-P-TiN-WS_(2) composite coatings are prepared on the surface of mild steel using electroless plating with a controlled dosage of nano-WS_(2) and a fixed dosage of nano-TiN particles in bath.The morphology,microstructure and chemical composition of the coatings are characterized by scanning electron microscopy(SEM),X-ray diffractometry(XRD)and energy disperse spectroscopy(EDS).The tribologiacl properties of the composite coatings are investigated by wear testing with a ball-on-disc configuration.The results show that the co-deposition of nano-WS_(2) and nano-TiN particles can form a compact and smooth surface.With the increase of nano-WS_(2) dosage in bath,the Vickers hardness of the coatings decreases first and then increases,while the friction factor creases first and then decreases as sliding against Si_(3)N_(4) balls,the wear rate of the composite coatings decreases significantly and the wear resistance have been enhanced.The composite coating deposited under a nano-WS_(2) dosage of 2.5 g/L in bath exhibits the best tribological performance.The results that the addition of nano-WS_(2) particles with the optimal dosage significantly improves the comprehensive performance of the composite coatings,can provide a reference for the development of advanced coatings with high wear resistance and low friction coefficient.

关 键 词：纳米WS_(2) 纳米TiN 镍磷合金 复合化学镀 摩擦因数 耐磨性能 

分 类 号：TQ153[化学工程—电化学工业]