(中南工業(yè)大學(xué)材料科學(xué)與工程系， 長沙 410083西南鋁加工廠， 重慶 631326
)
摘 要: 對不同雜質(zhì)含量的高純鋁錠按特定生產(chǎn)工藝得到高壓陽極軟態(tài)光箔和腐蝕箔。 采用X射線衍射法測得板面晶面衍射強(qiáng)度， 蝕坑法顯示晶粒取向形貌， 采用極圖、 取向分布函數(shù)(ODF)研究晶粒取向及其分布情況。 研究了鋁箔再結(jié)晶織構(gòu)隨Fe等雜質(zhì)含量的變化， 分析了Fe雜質(zhì)元素對鋁箔再結(jié)晶行為的影響。 借助掃描電鏡觀察箔材腐蝕坑形貌， 并分析沿不均勻的亮區(qū)、 暗區(qū)成分的分布。 研究結(jié)果表明： 鋁箔的再結(jié)晶織構(gòu)主要由立方織構(gòu)｛100｝〈001〉及R織構(gòu)｛124｝〈211〉構(gòu)成， 兩者的相對強(qiáng)弱隨Fe等雜質(zhì)含量有規(guī)律地變化。 鋁箔的比電容隨立方織構(gòu)的增加而增加。 鋁箔的再結(jié)晶行為及腐蝕性能受Fe等雜質(zhì)含量與分布的控制。 這些研究結(jié)果為探索高壓陽極電容鋁箔的最佳Fe等雜質(zhì)含量范圍、 制定最佳生產(chǎn)工藝， 獲得高比例的立方織構(gòu)(＞88%)和高比電容(＞1.0μF/cm2， 375V)提供了理論依據(jù)和實(shí)驗(yàn)資料。
關(guān)鍵字: 電容鋁箔 高純鋁 立方織構(gòu) 再結(jié)晶 比電容
TEXTURES AND SPECIFIC CAPACITANCES
OF HIGH PURE ALUMINIUM FOILS
（Department of Materials Science and Engineering,Central South University of Technology, Changsha 410083, P. R. China
Southwestern Aluminium Fabrication Plant, Chongqing 631326, P. R. China
）
Abstract:High pure aluminium (＞99.99%) foils were investigated for the effects of Fe impurity (1～4)×10-5 on the recrystallization textures by means of X-ray diffraction, pits-etching. The pole figures were measured and ODF’s were also calculated by Bunge method. The specific capacitances of the studied foils were determined as well. It was shown that with decreasing of Fe content cube texture in the foils increases, while R texture decreases, the specific capacitance of the foils increases with cube texture. By systematic investigation of the influence of Fe content on the recrystallization textures, it was derived that cube texture dominated (≥88 volume fraction) and the microstructure was homogeneous much more if the contents of the element Fe were smaller than the limit (about 10-5), which would be caused by Fe content for from equilibrium staturation and no precipitates formed during the recrystallization annealing. It was also showed that the inhomogeneities of compositions and microstructure in the foils often occurred if the segregation of Fe came into being before the recrystallization.
Key words: capacitor aluminium foil high pure aluminium cube texuture recrystallization specific capacitance
