材料期刊网

目的：研究表面活性剂FC4和PTFE添加量，对Ni-P-PTFE化学复合镀层质量和镀层中PTFE体积分数的影响规律以及对镀层的摩擦磨损性能的影响。方法改变镀液中FC4和PTFE添加量，获得不同的Ni-P-PTFE化学复合镀层，用扫描电子显微镜观察镀层形貌，用能谱仪并结合直方图方法测算镀层中PTFE的体积分数，研究镀层质量和镀层中PTFE的体积分数随镀液中FC4和PTFE添加量的变化规律，测试镀层的摩擦学性能。结果 Ni-P-PTFE复合镀工艺中FC4的用量为0.3 g/L时镀层表面质量最好，镀层中PTFE体积分数最大；PTFE体积分数为10%时Ni-P-PTFE复合镀层的磨损率最小。结论镀层中PTFE的体积分数随镀液中PTFE添加量的增加而增加，对镀层磨损率的减小存在最优值。

ABSTRACT:Objective To investigate the influence rules of FC4 surfactant and PTFE addition amount on the quality of the coat-ing, the volume fraction of PTFE in the coating and the friction-wear properties. Methods Different electroless Ni-P-PTFE compos-ite platings were obtained by changing the addition amount of FC4 and PTFE. The morphology of the coatings was observed by Scanning Electron Microscope and the volume fractions of PTFE in the coatings were measured and calculated by combining Energy Disperse Spectroscopy with histogram method. The changing rules of the quality of the coatings and the volume fraction of PTFE in the coatings with the addition amount of FC4 and PTFE were investigated,and the tribological property of the coatings was analyzed. Results The best coating with the biggest volume fraction of PTFE was obtained when the addition amount of FC4 was 0. 3 g/L in the electroless Ni-P-PTFE composite plating process, and the coating with the lowest wear rate was prepared when the volume frac-tion of PTFE in the coating was 10%. Conclusion The volume fraction of PTFE in the coating increased with increasing addition a-mount of PTFE in the plating solution, and there was a minimum wear rate when the volume fraction of PTFE in the coating changed within the limit.