The Influence of High Energy Ball Milling Time on the Grain Size and Sintering Densification Behavior of W-30Cu Composite Powder

Grain size and sintering densification behavior of W-30Cu composite powder influenced by high energy milling time were investigated.The result shows that,while the high energy ball milling time was in the range of 16 ～ 33 h,the crystalline size of the composite powder was reduced from 25 nm to 10 nm,and the mechanical alloy phenomenon was happened;while sintered at 1 275 ℃ for 60 m the composite powder milled for 18 h was achieved 100% density.Likewise,the high energy ball milled W-30Cu composite powder has the excellent hot stabilization,while the composite powder was annealed at 950 ℃,the grain size was not coarsen;The hardness of the sintered W-30Cu composite material was higher than the normal.The W-30Cu composite with the grain size about 300 ～ 550 nm can be achieved after sintering at 1 275 ℃ for 30 min.