Effect of Cu Addition on W-Ni-Fe Alloys Sintered at a Low Temperature  

作　　者：ChuanbinWANG QiangSHEN 等 

机构地区：[1]StateKeyLaboratoryofAdvancedTechnologyforMaterialsSynthesisandProcessing,WuhanUniversityofTechnology,Wuhan430070,China [2]StateKeyLaboratoryofAdvancedTechnologyforMaterialsSynthesisandProcessing,WuhanUni

出　　处：《Journal of Materials Science & Technology》2002年第3期234-236,共3页材料科学技术（英文版）

摘　　要：In this study, Cu was added as the third additive to lower the sintering temperature of W-Ni-Fe alloy. By adding 2 wt pct Cu, a dense 93W-3.5Ni-l.5Fe-2.0Cu tungsten alloy was obtained by hot-pressing at a low temperature of 1573 K which is a process of liquid-phase sintering. As a result, the morphology of W-Ni-Fe alloy changed obviously after the addition of Cu and the alloy had-higher relative density and rupture strength. The mechanism of the densification of W-Ni-Fe-Cu alloy at the low temperature.was then mainly investigated. It was found that, part sintering activators Ni and Fe could exist in liquid form at 1573 K due to the addition of Cu, which made it easy for Ni and Fe to dissolve W and thus the full densification of W-Ni-Fe-Cu alloy at the low temperature was realized.

关 键 词：W-Ni-Fe alloy SINTERING Mechanical properties 

分 类 号：TF123.71[冶金工程—粉末冶金] TF124.37[冶金工程—冶金物理化学]