Evolution of recrystallization textures in
high voltage aluminum capacitor foils
high voltage aluminum capacitor foils
(1. Department of Materials Science and Engineering,
Central South University, Changsha 410083, P.R.China；
2. Northeast Light Alloy Co. Ltd., Harbin 150060, P.R.China)
Central South University, Changsha 410083, P.R.China；
2. Northeast Light Alloy Co. Ltd., Harbin 150060, P.R.China)
Abstract: The evolution of recrystallization textures in high voltage aluminum capacitor foils which are produced with a high level of cold reduction was tracked by analysis of microstructure and crystallographic texture. The results show that the deformation textures are mainly composed of S-orientation, Cu-orientation and a little Bs-orientation. During the low temperature stages of final annealing, the iron precipitates first along the sub-grain boundaries, and the Fe concentration in the matrix becomes low. Then, the cube grains nucleate preferably into the sub-grains. At high temperature stages, the cube nuclei can grow preferably because of their 40°〈111〉 orientation relationship to the S orientation, the main component of the rolling texture. Finally, the cube texture is sharply strong and the R orientation is very weak in the foils.
Key words: aluminum capacitor foils; deformation textures; recrystallization textures