摘要
以羰基镍粉为原料，采用粉末冶金法制备热管用 Ni 多孔毛细芯，研究装料密度、烧结温度、烧结时间等对毛细芯的孔隙率、平均孔径、微观形貌、渗透率及毛细压力的影响规律。结果表明：在烧结温度为750～800℃，烧结时间为30～45 min，装料密度为0.9～1.0 g/cm3条件下烧结，获得的毛细芯具有良好的综合性能，孔隙率为55%～64%，渗透率为1.2～1.7×10-13 m2，毛细压力为200～240 kPa，满足环路热管用毛细芯的性能要求。
The sintered nickel porous capillary wicks for loop heat pipe （LHP） were prepared by powder metallurgy. The effects of sintering temperature, time and packing density on porosity, average pore size, microstructure, permeability, and capillary pressure were investigated by the Archimedes drainage method, scanning electron microscopy （SEM）, Darcy＆#39;s Law and other property test methods. The results show that the porous capillary wicks with the most excellent comprehensive performance can be fabricated by sintering at the temperature of 750-800℃, sintering time of 30-45 min and packing density of 0.9-1.0 g/cm3. And the fabricated porous capillary wicks have the porosity of 55%~64%, permeability of 1.2-1.7×10-13 m2 and capillary pressure of 200-240 kPa, which meet the demands of porous capillary wick for LHP.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2014年第5期687-694,共8页
Materials Science and Engineering of Powder Metallurgy
基金
国家自然科学基金资助项目(51274246)
关键词
环路热管
粉末冶金
孔隙率
渗透率
毛细压力
loop heat pipe
powder metallurgy
porosity
permeability
capillary pressure
