聚氨酯海绵浸渗法制备高孔隙率泡沫铜

Preparation of High Porosity Copper Foam by Polyurethane Sponge Impregnation Method

摘要:

采用聚氨酯海绵浸渗法制备了具有高孔隙率（85%~95%）、通孔结构的泡沫铜。根据聚氨酯海绵浸渗法的工艺特点讨论了泡沫铜的烧结制度，分析检测了泡沫铜成分，并对一次浸渗和二次浸渗两种工艺流程制备得到的泡沫铜的孔隙形貌和压缩性能进行了对比。结果表明，通过二次浸渗工艺可以改变泡沫铜孔壁微观组织结构，并在孔隙率下降不大的情况下使泡沫铜的压缩应力平台从0.5 MPa提高到1 MPa，这对改善材料的能量吸收性能具有重要意义。

Abstract:

The polyurethane sponge impregnation method was used to prepare copper foam with a high porosity (85%~95%) and open-cell structure. The sintering technology was discussed in accordance with the characteristics of this method. Additionally, the composition of copper foam was analyzed and the microstructure and compressive performances of copper foam fabricated by single-impregnating and double-impregnating were measured and compared. It is indicated that the microstructure at cell wall of the copper foam can be changed and the porosity decreases slightly after treatment of double impregnating, but the compressive stress level increases from 0.5 MPa to 1 MPa which is of great importance for improving the performance of material energy absorption.