Thermodynamic principle and properties of electroplated RE-Ni-W-P-B4C composite coatings
(0) The φ －pH diagram of Ni-W-P-H2O system at 298.15 K,10 1325 Pa was plotted by thermodynamic calculation software FactSageTM 5.1.The results show that tungsten and phosphorus can be co-deposited with nickel in type of Ni4W,Ni3P,Ni5P2,respectively.XRD analysis shows that the main phase of RE-Ni-W-P-B4C coatings is amorphous as deposited.After heated at 673 K for 3 h,part phases change to crystalline which are Ni,Ni3P,P,W,Ni3C,Ni3B,CeO2.SEM shows the micrograph of the coatings is even and the solid particles scatter well.The thickness of the coating is 2 219 μm after electroplating for 96 h.The micro-hardness of the coatings is HV 825HV 1 097 as-deposited and increases to HV 1 236 after heat treated.The wear resistance of the coatings is good and the friction coefficient changes from 0.10 to 0.33 during the abrasion process.The resistance to oxidation of the composite coatings is better than Ni-W-P alloy coatings and worse than that of RE-Ni-W-P-SiC coatings.
RE-Ni-W-P-B4C coatings microstructure micro-hardness wear resistance high temperature oxidation resistance
ZHU Cheng-yi LI Guang-qiang QIN Qing-wei MA Guo-jun
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）