【作者】 夏法锋； 吴蒙华； 李智； 吴庆利；

【Author】 XIA Fa-feng ,WU Meng-hua ,LI Zhi, WU Qing-li (School of Mechanical Engineering,Dalian University of Technology,Dalian 116023,China; School of Mechanical Engineering,Dalian University,Dalian 116622,China; School of Mechanical Engineering,Shenyang Ligong University,Shenyang 110168,China)

【机构】 大连理工大学机械工程学院； 大连大学机械工程学院； 沈阳理工大学机械工程学院；

【摘要】 采用脉冲电沉积法,在不锈钢上制备Ni-纳米Si3N4复合镀层。主要研究了Si3N4粒子的浓度、阴极电流密度、搅拌速度等对复合镀层磨损量的影响。利用高分辨电子显微镜对镀层进行观察,并进行腐蚀试验测试。结果表明,Ni-纳米Si3N4复合镀层的最佳工艺参数为Si3N4粒子的浓度4g／L,电流密度4A／ dm2,搅拌速度2000r／min。在Ni-纳米Si3N4镀层中, 纳米Si3N粒子的直径均不超过50nm,且镍晶粒得到细化;该复合镀层具有优良的耐腐蚀性。更多还原

【Abstract】 Ni-nano Si3N4 composite coatings were prepared by plus-deposition method on the stainless steel. We mostly studied the effects of Si3N4 particles concentration,current density and churn rate on the particles contents in the composite coatings. The two composite coatings were observed with high respective electron micrographs and tested with corrosion resistance tests. The test results showed that the optimum technology parameters of Ni-Si3N4 composite coatings were obtained as following: Si3 N4 particles concentration 4 g/L,current density 4A/dm2,churn rate 2000r/min. In Ni-nano Si3N4 composite coatings,the diameter of nano Si3N4 particles were not exceed 50nm and the nickel grains were fined. The Ni-nano Si3N4 composite coatings had better corrosion resistance.更多还原