Microstructure and Tribological Properties of Ni-Co/SiC Coatings Prepared by Occlusion Electroplating for Grinding Tools
In order to improve the grinding performance and service life of electroplating composite coatings with high percent of hard abrasives, the composite coatings of Ni-Co/SiC were prepared by occlusion electroplating technology and their microstructure and tribological properties were studied. The research results show that the cathodal electric-current density in occlusion electroplating process and the SiC abrasive size have great influence on microstructure and tribological properties of Ni-Co/SiC coatings. The optimum value of cathodal electric-current density is 1 A/dm2 and the proper SiC abrasive size is about 20 μm, in which the Ni-Co/SiC coatings have excellent wear resistance and high grinding ability. The main wear mechanisms of Ni-Co/SiC coatings are micro-cutting and adhesive wear of matrix alloy, and micro-cracking wear and spalling of SiC abrasives.
Shengyi Li, Yingchun Liu, Rongbo Zhu, Hongguang Li, Wensi Ding
Y. F. Tan et al., "Microstructure and Tribological Properties of Ni-Co/SiC Coatings Prepared by Occlusion Electroplating for Grinding Tools", Applied Mechanics and Materials, Vols. 34-35, pp. 1457-1461, 2010