烧结镍毛细芯的孔参数控制及其对抽吸性能的影响  

Control of pore parameters and influence on capillary pumping performance of sintered nickel wicks

作　　者：徐计元[1] 邹勇[2] 程林[1] 

机构地区：[1]山东大学热科学与工程研究中心,山东济南250061 [2]山东大学材料液态结构及遗传性教育部重点实验室,山东济南250061

出　　处：《化工学报》2012年第2期463-469,共7页CIESC Journal

基　　金：山东省中青年科学家科研奖励基金项目(BS2009CL052)~~

摘　　要：采用溶盐造孔法成功制备了孔隙率及孔径分布可控的高强度烧结镍毛细芯,分析了不同质量及粒度的溶盐对毛细性能的影响。实验结果表明:随溶盐添加量的增加,烧结镍芯孔隙率趋于线性增长,当添加量为40%(质量)时,烧结镍芯孔隙率高达73%,且有足够的强度。改变溶盐的粒度影响毛细芯孔径的分布,但对整体孔隙率影响不大。所制备试样的毛细抽吸特性研究表明,毛细芯的毛细抽吸性能不仅仅受孔隙率的影响,同样受孔径分布状态的影响,孔隙率相当的情况下,孔径较小且分布集中的毛细芯表现出更优异的毛细抽吸性能。Sintered nickel capillary wicks with controlled porosity,pore size distribution and high strength were prepared by salt-leaching pore forming method.The influences of different soluble salts and particle sizes on the capillary pumping performance were investigated.The results showed that the porosity of sintered nickel wicks increased linearly with the amount of soluble salt.When the amount of soluble salt was 40%（mass ratio）,the nickel wick porosity reached 73% with high strength.The particle size of soluble salt can influence the pore size distribution of the wicks,but the porosity does not change obviously.The experimental research showed that the capillary pumping performance of the wicks was controlled not only by the porosity,but also by the pore size distribution.With the same porosity,wicks with smaller pore size and more centralized pore size distribution showed more excellent capillary pumping performance.

关 键 词：溶盐造孔 烧结毛细芯 毛细抽吸性能 孔径分布 

分 类 号：TF125[冶金工程—粉末冶金] TK172.4[冶金工程—冶金物理化学]