公开(公告)号：US11341995B2

公开(公告)日：2022-05-24

申请号：US17284187

申请日：2019-10-15

申请人： UACJ CORPORATION ,  FURUKAWA ELECTRIC CO., LTD.

发明人： Kotaro Kitawaki ,  Yu Igarashi ,  Keisuke Kamiya ,  Yu Matsui ,  Makoto Yonemitsu ,  Ryo Sakamoto ,  Hideyuki Hatakeyama ,  Hiroki Ota

IPC分类号： G11B5/73 ,  C22C21/02 ,  C23C18/32

摘要： An aluminum alloy sheet for a magnetic disk, a method for manufacturing same, and a magnetic disk using same. The aluminum alloy sheet is made of an aluminum alloy comprising 0.10 to 3.00 mass % of Fe, 0.003 to 1.000 mass % of Cu, and 0.005 to 1.000 mass % of Zn, with a balance of Al and unavoidable impurities, wherein a value obtained by dividing a difference in an area ratio (%) of second phase particles between a region (A) and a region (B) by an average value of area ratios (%) of second phase particles in the regions (A) and (B) is 0.05 or less, the region (A) being a region from a sheet thickness center plane to a front surface of the sheet, and the region (B) being a region from the sheet thickness center plane to a rear surface of the plate.