阴极箔比电容的影响
(中南大学 材料科学与工程学院, 长沙 410083)
摘 要: 采用扫描电镜及能谱仪， 透射电镜和比电容检测等方法研究了中间退火前后冷轧变形量对3003铝合金阴极箔第二相分布及比电容的影响。 结果表明： 随着最终冷变形程度的增加， 位错密度增大， 从而比电容值显著提高； 最终冷轧变形量为90%时， 比电容达到最大值， 继续增加冷轧变形量， 比电容值反而下降； 但对于最终冷轧变形量95%的箔材， 由于中间退火前冷轧变形量较低， 使得退火过程中析出的弥散第二相数目减少， 最终导致成品箔中的腐蚀位置减少， 比电容降低。
关键字: 3003铝合金； 比电容； 变形； 位错密度； 第二相； 冷轧
after intermediate annealing on
specific capacitance of cathode foils of 3003 aluminum alloy
（ School of Materials Science and Engineering,
Central South University, Changsha 410083, China）
Abstract: By means of SEM(EDX), TEM and specific capacitance testing, the effects of cold rolling reduction before and after mediate annealing on the distribution of the second phases and the specific capacitance of cathode foil of 3003 aluminum alloy were investigated, respectively, The results show that the quantity of the fine second phase particles increases with the cold rolling reduction before the annealing treatment. The more the fine second phase particles, the higher the specific capacitance. The dislocation density which increases with the final cold rolling reduction can effectively enhance the specific capacitance, but there is a maximum specific capacitance at 90% reduction. So, both the dislocation density after the final cold rolling and the quantity of the second phases precipitated during the mediate annealing affect the final specific capacitance of the cathode foils of 3003 aluminum alloy obviously.
Key words: 3003 aluminum alloy; specific capacitance; strain; dislocation density; second phase; cold rolling
