烧结温度对多孔钽性能影响  

Effect of Sintering Temperature on Properties of Tantalum Porous Materials

作　　者：康新婷[1] 李亚宁[1] 李广忠[1] 李烨[1] 

机构地区：[1]西北有色金属研究院金属多孔材料国家重点实验室,陕西西安710016

出　　处：《稀有金属材料与工程》2017年第4期1092-1096,共5页Rare Metal Materials and Engineering

基　　金：国家重点研发计划(2016YFB0600101)

摘　　要：以粒径为1~2μm的钽粉造粒形成的二次球形颗粒为原料,采用模压成形、真空烧结的方法制备了多孔钽。研究了烧结温度对多孔钽孔隙性能的影响。结果表明:粉末压坯在烧结过程中随着温度的升高,烧结颈逐渐形成、长大,烧结体的尺寸发生收缩,孔隙度和透气系数减小,强度提高;1800℃时具有大孔与小孔交错分布的三维多孔结构,此时1.2~2.2μm的孔隙占84%。Tantalum porous material was prepared by compression molding and vacuum sintering with the secondary spherical particles from 1-2 μm sized Ta powder as starting material. The effect of sintering temperature on the properties of the Ta porous material was investigated. Results show that with the increase of the sintering temperature, the Ta green body shrinks due to the formation and growth of sintering-neck during the sintering; as a result, the porosity and permeability coefficient decrease while the shear strength improves Three-dimensional meshwork in connection with big and small pores appears in the tantalum porous material. When the sintering temperature increases to 1800 ℃, the maximum pore size decreases to the minimum; meanwhile, the pores less than 3.1 μm occupy 98% of the total pores

关 键 词：钽 多孔材料 烧结 温度 性能 

分 类 号：TF125.242[冶金工程—粉末冶金]