摘要
为了制备镍多孔过滤材料,本文以镍粉为原料,以K2CO3为造孔剂,采用烧结溶解法制备了不同孔隙率镍多孔试样。本文讨论了造孔剂体积分数、压坯压力、烧结温度对样品孔隙率、孔径和透气度的影响,以及孔隙率与抗压强度的关系。研究表明:当造孔剂添加量在10%~40%时,样品孔隙率θ为27. 8%~52. 4%。当压坯压力在100~400 MPa时,随压力增大样品孔隙率、孔径和透气度均降低;烧结温度在1000~1250℃时,随烧结温度升高,孔径和透气度先增大后缓慢降低,在1150℃出现峰值。当造孔剂体积分数为30%,压制压力200 MPa时,烧结温度为1150℃时,所制备多孔镍孔隙率为40. 56%,最大孔径为26. 7μm,透气度255. 01m^3·(h·kPa·m^2)^-1,抗压强度为24.12 MPa。
In order to prepare the nickel porous filtration material,with nickel powder as raw material and K2 CO3 as pore forming agent,the porous nickel samples with different porosity were fabricated by a sintering-dissolution process. The influence of space holder,compacting pressure and sintering temperature on the porosity,cell size and permeability of samples,and the relations of porosity and compressive strength were investigated and discussed. The experimental results showed that the porosity of samples was 27. 8% ～ 52.4%. While compacting pressure was 100 ～ 400 MPa,the porosity,cell size and permeability of samples decreased with compacting pressure increasing; while sintering temperature was 1000 ～ 1250 ℃,the cell size and permeability increased first,then slowly decreased with the sintering temperature increasing,and the peak value appeared at 1150 ℃. When the volume fraction of space holder was 30%,compacting pressure was 200 MPa,sintering temperature was 1150 ℃,the porous nickel sample was fabricated with porosity of 40. 56%,maximum cell size of 26. 7 μm,permeability of 255. 01 m3·( h·kPa·m2)-1,and compressive strength of24. 12 MPa.
作者
汪天尧
周芸
孙亚东
李和汀
左孝青
Wang Tianyao;Zhou Yun;Sun Yadong;Li Heting;Zuo Xiaoqing(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2018年第12期1301-1308,共8页
Chinese Journal of Rare Metals
基金
国家自然科学基金项目(51264024)资助
关键词
多孔镍
孔隙率
过滤材料
透气度
porous nickel
porosity
filter material
permeability
