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通过真空熔炼和快速凝固技术制备了Cu-55Al(at%)合金铸锭和快淬薄带,用稀盐酸浸泡法对所得合金进行了化学脱合金。采用XRD、SEM和TEM等方法对脱合金前后的相组成及微观形貌进行了表征。结果表明,合金原始物相均由AlCu和Al2Cu相组成,快淬薄带中Al2Cu相含量更高。二者经脱合金后均能获得三维无序网状多孔铜,孔带平均尺寸分别为83、58 nm。此外,块体多孔铜中虽有少量Al残余,但孔带光滑完整。而合金薄带虽然能够完全脱Al,但孔带表面粗糙,并含有少量的Cu2O。电化学测试表明,多孔铜在碱性条件下电氧化甲醇的电流密度较光滑铜电极提高了25倍,同时还表现出优良的电容性能。
The Cu-55Al (at%) alloy ingot and quenched ribbon were prepared by vacuum melting and rapid solidification. The obtained alloy was descaled by dilute hydrochloric acid immersion method. XRD, SEM and TEM were used to characterize the phase composition and morphology before and after deuteration. The results show that the phase of the alloy is composed of AlCu and Al2Cu phases, and the content of Al2Cu in the quenched ribbon is higher. Both of them can get three-dimensional disordered porous copper network after the alloying, the average size of the porous zone is 83,58 nm. In addition, although a small amount of porous copper block residual Al, but with smooth and complete pore. While the alloy strip can completely Al, but the surface of the hole with a rough, and contains a small amount of Cu2O. Electrochemical tests show that the current density of porous copper electro-oxidation of methanol under alkaline conditions is 25 times higher than that of the smooth copper electrode, and also shows excellent capacitance performance.