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
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
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)
关键词
钽
多孔材料
烧结
温度
性能
tantalum
porous materials
sintering
temperature
properties
