成型方法对高性能钡钨阴极基体孔结构的影响  

Effects of pressing method on pore structure of tungsten matrix used in high property Ba-W cathodes

作　　者：刘昊[1] 卢平[1] 沈春英[1] 丘泰[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《硬质合金》2011年第1期44-47,共4页Cemented Carbides

摘　　要：采用全自动压汞仪对传统的模压成型和等静压成型的钨坯和钨基孔结构分布进行了研究。结果表明:模压成型的钨坯平均孔径为1.02μm,钨基平均孔径1.41μm,孔径分布不均匀,钨基中小孔径与大孔径的量较多;等静压成型的钨坯平均孔径为1.18μm,孔径分布范围窄,钨基平均孔径为1.55μm,1.00～2.20μm的孔径占总孔径的68.15%。The distribution of pore structure of the tungsten green body and the tungsten matrix prepared by compression molding and isostatic pressing method were researched by mercury instrusion porosimeter（MIP）.The results show that the average pore size of tungsten green body prepared by compression molding is 1.02 μm,of tungsten matrix is 1.41 μm.The distribution of pore size is uneven.There are many small and big pores in tungsten matrix.The tungsten green body prepared by isostatic pressing method has narrow pore size distribution,with average pore size of 1.18 μm.The average pore size of tungsten matrix prepared by isostatic pressing method is 1.55 μm,and the pore size of 1.0～2.2 μm is account for 68.15% of the total pore size.

关 键 词：钡钨阴极 成型方法 钨基 孔结构 

分 类 号：TF124.3[冶金工程—粉末冶金]