陰極箔比電容的影響
(中南大學(xué) 材料科學(xué)與工程學(xué)院, 長(zhǎng)沙 410083)
摘 要: 采用掃描電鏡及能譜儀， 透射電鏡和比電容檢測(cè)等方法研究了中間退火前后冷軋變形量對(duì)3003鋁合金陰極箔第二相分布及比電容的影響。 結(jié)果表明： 隨著最終冷變形程度的增加， 位錯(cuò)密度增大， 從而比電容值顯著提高； 最終冷軋變形量為90%時(shí)， 比電容達(dá)到最大值， 繼續(xù)增加冷軋變形量， 比電容值反而下降； 但對(duì)于最終冷軋變形量95%的箔材， 由于中間退火前冷軋變形量較低， 使得退火過(guò)程中析出的彌散第二相數(shù)目減少， 最終導(dǎo)致成品箔中的腐蝕位置減少， 比電容降低。
關(guān)鍵字: 3003鋁合金； 比電容； 變形； 位錯(cuò)密度； 第二相； 冷軋
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
