不同形貌铜粉制备多孔泡沫铜的研究  

Microstructure and properties of porous copper foams prepared from different copperpowders

作　　者：方青青 陈睿智 陈鹏起 程继贵[1,2,3] FANG Qingqing;CHEN Ruizhi;CHEN Pengqi;CHENG Jigui(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;Engi-neering Research Center of Powder Metallurgy of Anhui Province,Hefei 230009,China;Copper Alloy and Forming Engineering Research Center of Ministry of Education,Hefei 230009,China)

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]安徽省粉末冶金工程技术研究中心,安徽合肥230009 [3]高性能铜合金材料及成形加工教育部工程研究中心,安徽合肥230009

出　　处：《粉末冶金工业》2024年第2期21-27,48,共8页Powder Metallurgy Industry

基　　金：安徽省科技攻关计划资助项目(202004a05020042)。

摘　　要：分别以水气联合雾化法制备的铜粉和电解法制备的铜粉为原料,通过松装烧结法在700~900℃下烧结120 min制得泡沫铜烧结体。考察了原料铜粉类型和烧结温度对所制备的泡沫铜烧结体孔隙率、孔隙特性和性能的影响。实验结果表明,随着烧结温度升高,泡沫铜孔隙率呈减少趋势。在相同的烧结工艺下,由雾化铜粉制备的多孔烧结体孔隙率约为30%~60%,孔隙形状较为规则;而由电解铜粉制备的多孔烧结体孔隙率约为40%~70%,孔隙形状不规则。在烧结温度750℃下以雾化铜粉为原料制得的50%左右孔隙率泡沫铜烧结体的初始屈服强度为20.18 MPa,热导率为59.13 W·m/K;而在烧结温度850℃下以电解铜粉为原料制得的同孔隙率泡沫铜烧结体的初始屈服强度为14.44 MPa,热导率为41.32 W·m/K。当烧结体孔隙率相近时,以雾化铜粉为原料制得的泡沫铜烧结体具有更好的力学性能和热学性能,并对不同类型铜粉在松装烧结过程中孔隙形成机制进行了探讨。Porous copper foams were prepared by loose sintering water-air combination atomization copper powder and electrolytic copper powder at 700~900°C for 120 min,respectively.Influence of the raw copper powders and the sintering temperature on the porosity,pore structure and properties of the sintered porous copper samples were investigated.The results show that with the increase of sintering temperature,the porosity of sintering samples decreases.The porosity of sintered samples prepared from water-air combination atomized copper powders is about 30%-60%,with uniform morphology of pores,while the porosity of the sintered samples prepared from electrolytic copper powders is about 40%-70%,with irregular pore morphology.At the porosity of 50%,the initial yield strength and thermal conductivity of the sintered porous copper samples prepared from the atomized copper powder are 20.18 MPa and 59.13 W-m/K,respectively,while for the samples prepared from the electrolytic copper powder are 14.44 MPa and 41.32 W-m/K respectively.The sintered copper foam prepared from the atomized powder own better mechanical and thermal properties with similar porosity,which can be ascribe to the pore formation mechanism during the loose sintering process.

关 键 词：泡沫铜 松装烧结 孔隙率 性能 水气联合雾化 

分 类 号：TF124.5[冶金工程—粉末冶金]