高孔隙率微孔镍的制备及性能

Preparation and Properties of Microporous Nickel with High Porosity

摘要:

提出了一种烧结后闭孔加工再开孔的策略，通过粉末冶金方法和后续加工处理制备出了高孔隙率的微孔镍材料。采用粒径为1 μm的羰基镍粉为原料，研究了烧结工艺参数对多孔镍的孔隙性能和力学性能的影响。结果表明，在400 ℃烧结温度下，压汞法测得微孔镍的孔隙率为53.7%，平均孔径为612.25 nm。经加工处理后的压汞孔隙率为54.0%，平均孔径为511.37 nm，加工后孔隙结构仍符合应用要求，为多孔镍及其他多孔金属材料的制备开辟了一条新的途径。

Abstract:

The strategy of sintered closed-hole followed by reopening was proposed to prepare the microporous nickel material with high porosity through the powder metallurgy and subsequential treatments. The carbonyl nickel powder with particle size of 1 μm was used as raw material, and the effects of sintering process parameters on the pore properties and mechanical properties of microporous nickel were studied. Results show that the porosity measured by mercury injection method of microporous nickel is 53.7%, and the average pore diameter is 612.25 nm at the sintering temperature of 400 °C. After machining, the porosity measured by mercury injec-tion method is 54.0%, and the average pore diameter is 511.37 nm, which still satisfies the requirements of engineering application. The strategy provides providing a new approach for the preparation of microporous nickel and other porous metal materials.