摘要
在以氨基磺酸镍为主盐、硼氢化钠为硼源的电解液中,采用恒流电镀法于铜基底表面制备了镍-硼合金镀层。采用相似的方法制备了纯镍镀层和镍-铁合金镀层作为对照。使用真空退火炉对镍-硼合金镀层进行热处理。采用X射线衍射仪、扫描电子显微镜对镀层的晶体结构和表面形貌进行了表征和分析,采用显微硬度计和摩擦磨损试验机对镀层的硬度和耐磨性进行了测试。通过扫描电子显微镜观察表面摩擦磨痕形貌,分析镀层摩擦磨损机制。结果表明：镍-硼合金镀层表面光亮平整,硬度可达7000-8000 MPa;经过300℃热处理后硬度可达到11000MPa。镍-硼合金镀层的耐磨性比镀镍层和镍-铁合金镀层的有很大的改善。
Ni-B alloy coatings were prepared on copper substrate by constant current electroplating method from the electrolyte system with nickel sulfamate as main salt and sodium borohydride as boron source, and pure Ni coating and Ni-Fe alloy coating were prepared using similar method as control samples. Ni-B alloy coatings were heat treated in vacuum annealing furnace. The crystal structure and surface morphology were characterized by X-ray diffractometer and scanning electron microscopy, and the hardness and wear resistance were tested by microhardness tester and friction wear testing machine. Wear cracks morphology of the coatings were observed, and then the wear mechanisms were analyzed. Results showed that Ni-B alloy coatings featuring bright and smooth surface, the hardness reach up to 7000 ~ 8000 MPa. Furthermore, higher hardness value of about 11 000 MPa can be obtained after heat treatment at 300 ℃. Compared to pure Ni coating and Ni-Fe alloy coating, Ni-B alloy coatings present better wear resistance.
出处
《电镀与环保》
CAS
CSCD
北大核心
2015年第6期8-11,共4页
Electroplating & Pollution Control
基金
国家基金(51335010
51105356)
宁波市创新团队(2011B81001)
浙江省创新团队(2011R50006)
关键词
电镀
镍-硼合金镀层
硬度
耐磨性
electroplating
Ni-B alloy coating
hardness
wear resistance
