Preparation and Research on W80Cu20 Electrical Contact Material

To improve the performance and service life of electrical contact materials, W80Cu20 contact materials mixed with B, Nb, CeO₂ and Y₂O₃ were prepared by melting seepage method, respectively. Through the characterization and analysis of its microstructure and properties, the best doping type and amount of elements in W80Cu20 alloy were determined. The results show that when B is doped in W80Cu20 alloy, the optimal doping amount is 0.1wt%, the relative density of the alloy is as high as 99.1%, and the hardness and conductivity can reach 234 HB and 50.931×10³ S/m, respectively. The optimum Nb content in W80Cu20 alloy is 1 wt%, the relative density is 98.0%, the hardness and conductivity are 235 HB and 33.86×10³ S/m, respectively. When CeO₂ or Y₂O₃ is doped into W80Cu20, the optimum doping amount of CeO₂ is 0.3wt%, the relative density of the alloy is 97.6%, the hardness and conductivity are 234 HB and 42.76×10³ S/m, respectively. The optimum doping amount of Y₂O₃ is 0.4wt%, the relative density of the alloy is 98.9%, the hardness and conductivity are 232 HB and 39.8×10³ S/m, respectively. By comprehensive analysis, the optimal doping component in W80Cu20 alloy is B.