摘要
Copper porous materials have been manufactured by the method of powder metallurgy.Electrolytic copper powders and atomized copper powders are used as matrix material.Methylcellulose and paraffin are used as porogen.The influence of porogen type and copper powder morphology on the property of copper porous materials is investigated as well.The results show that copper porous materials with paraffin as porogen have lower porosity and permeability compared with materials using methylcellulose as porogen,due to the different pore-forming mechanisms.The pore forming mechanism of methylcellulose is thermal decomposition,while the pore forming mechanism of paraffin is melting–evaporation.The morphology of copper powders affects the contact state between adjacent powders,which further influence the sintering shrinkage.The porous materials using arborescent copper powders as matrix have lower porosity,smaller pore size and lower permeability,compared with materials with atomized copper powders as matrix.
分别以电解铜粉和雾化铜粉作为原材料,采用粉末冶金的方法制备了烧结铜多孔材料,其中造孔剂选用了甲基纤维素和石蜡两种。研究了造孔剂种类和铜粉形貌对烧结铜多孔材料性能的影响。结果表明,由于造孔机理的不同,选用不同造孔剂所得多孔材料的性能有差异。与以甲基纤维素为造孔剂制得的样品相比,以石蜡为造孔剂所制得的样品有孔隙率和渗透率更小。甲基纤维素的成孔机理是热分解,而石蜡的成孔机理是熔融蒸发。铜粉形貌影响铜颗粒之间的相互接触形式,进而影响烧结过程中烧结颈的形成。与以雾化铜粉为基体的材料相比,使用电解铜粉作为基质的多孔材料具有较低的孔隙率,较小的孔径和较渗透率。
基金
Project(2015DFR50580)supported by International S&T Cooperation Program of China
Project(51505503)supported by the National Natural Science Foundation of China
作者简介
Corresponding author:CHEN Jie,PhD,Associate Professor;Tel:+86–731–88876566;Fax:+86–731–88876566l;E-mail:chenjiecsu@163.com;ORCID:0000-0003-2083-0725
