针对开孔泡沫铜工艺流程复杂、制备成本高等缺点,将成型针织技术与二步浸渗有机材料方法结合,得到工艺简单且具有开孔结构的高孔隙率(〉80%)泡沫铜.根据有机材料浸渗法的工艺特点,讨论金属浆料性能和烧结工艺确定的影响因素,检测并分析泡沫铜孔隙形貌和压缩性能,对一次浸渗和二次浸渗两种工艺流程制备得到的泡沫铜结构性能进行对比.结果表明,金属浆料的pH值对浆料的流变特性有很大的影响,并且在pH为9.6时金属浆料的流动性最大;二次浸渗工艺在不改变孔隙率的情况下,泡沫铜的压缩应力平台从0.5 MPa提高到1 MPa.
The method of forming-knitting technology and organic materials secondary infiltration is successful to prepare open-pore structure of copper foam with high porosity (〉 80 %). According to the organic material's infiltration technical characteristics, metal paste performance and influence factors properties of copper foam of sinter process are discussed. Pore morphology and compressive are analyzed , and an infiltration and preparation are compared for e second time in two processes of copper foam structure performance comparison. The results show that pH value of metal paste has a large influence on rheological properties of slurry.In secondary infiltration process,without changing the porosity, the compression stress of copper foam platform is increased from 0.5 MPa to 1 MPa.