Open cell aluminum foams were prepared by traditional powder metallurgy process, with spherical carbamide particles as the space-holder.
以球形尿素颗粒为造孔剂，采用传统的粉末冶金工艺制备开孔泡沫铝并研究了其性能。
The porosity of porous Al-Si alloy is 40~80% and percentage of open-cell is above 85%, bom of which vary with the fabrication process of preform.
孔隙率在40～80%，孔隙连通率在85%以上，孔隙的大小和孔隙率取决于预制块的制备工艺。
Open cell aluminum foams were prepared by traditional powder metallurgy process, with spherical carbamide particles as the space-holder. The properties of open cell aluminum foams were studied.
以球形尿素颗粒为造孔剂，采用传统的粉末冶金工艺制备开孔泡沫铝并研究了其性能。
The result shows that the process conditions of polyester type open cell polyurethane foam are easy to control, and the mechanics performance of polyester type is better than that of polyether type.
实验结果表明：聚酯型网状聚氨酯泡沫塑料的制备工艺条件更容易控制，力学性能优于聚醚型；
The result shows that the process conditions of polyester type open cell polyurethane foam are easy to control, and the mechanics performance of polyester type is better than that of polyether type.
实验结果表明：聚酯型网状聚氨酯泡沫塑料的制备工艺条件更容易控制，力学性能优于聚醚型；
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