Title:
ALUMINUM ALLOY BLANK FOR MAGNETIC DISK AND ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK
Document Type and Number:
WIPO Patent Application WO/2020/184037
Kind Code:
A1
Abstract:
Provided are an aluminum alloy blank for a magnetic disk and an aluminum alloy substrate for a magnetic disk which have a high attenuation factor. The aluminum alloy blank for a magnetic disk and the aluminum alloy substrate for a magnetic disk each include 1.00-10 mass% Mn, with the remainder consisting of Al and unavoidable impurities, and the number density of intermetallic compounds having a maximum length of 0.2-15.0 µm on the surface of the blank or the substrate is 1.5×105/mm2 or higher.
Inventors:
YOSHIZAKI HIROAKI
IZUMI TAKAHIRO
OTSUKA YASUFUMI
IZUMI TAKAHIRO
OTSUKA YASUFUMI
Application Number:
PCT/JP2020/005290
Publication Date:
September 17, 2020
Filing Date:
February 12, 2020
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C22C21/00; G11B5/73; G11B5/733; C22F1/00; C22F1/04
Domestic Patent References:
| WO2017163943A1 | 2017-09-28 | |||
| WO2018207523A1 | 2018-11-15 |
Foreign References:
| JP2015093995A | 2015-05-18 | |||
| JP2010168602A | 2010-08-05 | |||
| JP2017110273A | 2017-06-22 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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