Title:
ALUMINUM ALLOY PLATE FOR MAGNETIC DISK, METHOD FOR MANUFACTURING SAME, AND MAGNETIC DISK USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/080363
Kind Code:
A1
Abstract:
Provided are an aluminum alloy plate for a magnetic disk, a method for manufacturing same, and a magnetic disk using same. The aluminum alloy plate is made of an aluminum alloy composed of 0.10-3.00 mass% of Fe, 0.003-1.000 mass% of Cu, and 0.005-1.000 mass% of Zn, with the remainder comprising Al and inevitable impurities, and is characterized in that the difference between the area percentages (%) of second-phase particles in region (A) and region (B) divided by the average value of the area percentages (%) of the second particles in region (A) and region (B) is 0.05 or less, where region (A) is a region from a plane centered in the thickness direction of the plate to the front surface of the plate, and region (B) is a region from the plane centered in the thickness direction of the plate to the back surface of the plate.
Inventors:
KITAWAKI KOTARO (JP)
IGARASHI YU (JP)
KAMIYA KYOSUKE (JP)
MATSUI YU (JP)
YONEMITSU MAKOTO (JP)
SAKAMOTO RYO (JP)
HATAKEYAMA HIDEYUKI (JP)
OTA HIROKI (JP)
IGARASHI YU (JP)
KAMIYA KYOSUKE (JP)
MATSUI YU (JP)
YONEMITSU MAKOTO (JP)
SAKAMOTO RYO (JP)
HATAKEYAMA HIDEYUKI (JP)
OTA HIROKI (JP)
Application Number:
PCT/JP2019/040500
Publication Date:
April 23, 2020
Filing Date:
October 15, 2019
Export Citation:
Assignee:
UACJ CORP (JP)
FURUKAWA ELECTRIC CO LTD (JP)
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
G11B5/73; C22C21/00; C22F1/04; G11B5/65; G11B5/82; G11B5/84; C22F1/00
Foreign References:
| JPS642229B2 | 1989-01-17 | |||
| JPH09235640A | 1997-09-09 | |||
| JPH11175963A | 1999-07-02 | |||
| JP6389546B1 | 2018-09-12 | |||
| JPS6316511B2 | 1988-04-08 |
Attorney, Agent or Firm:
KIMURA MITSURU (JP)
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