铜粉制备方法及烧结工艺对多孔散热材料的微观结构和性能的影响  

Influence of copper powder preparation method and sintering process on the microstructure and properties of porous heat dissipation materials

作　　者：王致远 莫文剑 袁志钟[1] 易翠 牛宗冉 陈朋飞 WANG Zhiyuan;MO Wenjian;YUAN Zhizhong;YI Cui;NIU Zongran;CHEN Pengfei(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China;Jiangsu Jicui Advanced Metal Materials Research Institute Co.,Ltd.,Suzhou 215506,China;Suzhou Cubrazing Materials Co.,Ltd.,Suzhou 215000,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]江苏省集萃金属研究所,江苏苏州215506 [3]苏州铜宝锐新材料有限公司,江苏苏州215000

出　　处：《粉末冶金工业》2024年第6期33-38,共6页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(52203379)

摘　　要：在当前芯片功耗增加所带来的巨大发热量的背景下,相变散热成为主流的散热方式。为了更好的了解不同制备方法的铜粉烧结制成的毛细芯的特性,以水雾化、气雾化、氧化还原和电解等方法制备的铜粉为原料,通过振实并烧结制备了毛细芯,研究了四种毛细芯的孔隙结构、晶粒微观组织,测试了烧结温度对毛细芯的力学性能、孔隙率和吸水性能的影响。结果表明,烧结制成的毛细芯中,水雾化铜粉、氧化还原铜粉和电解铜粉比气雾化铜粉拥有更加丰富连通的孔隙网络。电解铜粉由于其较高的比表面积,在980℃烧结后的体积收缩率(56.70%)远高于另外三种铜粉(水雾化铜粉:33.23%,气雾化铜粉:12.22%,氧化还原铜粉:42.01%)。随着烧结温度的升高,毛细芯的强度增大,孔隙率下降,吸水性能降低。In the context of the current huge heat generation caused by the increase in power consumption of chips,phase change heat dissipation has become the mainstream heat dissipation method.In order to better understand the characteristics of capillary wicks made by sintering copper powders of different preparation methods,capillary wicks were prepared by vibrating and sintering copper powders prepared by water atomisation,gas atomisation,redox and electrolysis as raw materials,and the pore structures and grain microstructures of the four types of capillary wicks were investigated,and the effects of sintering temperatures on the mechanical properties,porosities and water-absorbent properties of the capillary wicks were tested.The results show that the water aerosolised copper powder,the redox copper powder and the electrolytic copper powder possesse a richer and more connected pore network than the aerosolised copper powder in the capillary wicks made by sintering.The volumetric shrinkage of electrolytic copper powder(56.70%)after sintering at 980℃is much higher than that of the other three powders(water-atomised copper powder:33.23%,air-atomised copper powder:12.22%,and redox copper powder:42.01%)due to its high specific surface area.With the increase of sintering temperature,the strength of capillary wicks increases,the porosity decreases,and the water-absorbing property decreases.

关 键 词：金属粉末 烧结 体积收缩率 孔隙率 润湿性 

分 类 号：TF124.5[冶金工程—粉末冶金]