ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK AND METHOD FOR MANUFACTURING SAME, ALUMINUM ALLOY BASE DISK FOR MAGNETIC DISK AND METHOD FOR MANUFACTURING SAME, AND MAGNETIC DISK AND METHOD FOR MANUFACTURING SAME

ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC DISK AND METHOD FOR MANUFACTURING SAME, ALUMINUM ALLOY BASE DISK FOR MAGNETIC DISK AND METHOD FOR MANUFACTURING SAME, AND MAGNETIC DISK AND METHOD FOR MANUFACTURING SAME

An aluminum alloy substrate for a magnetic disk including an aluminum alloy containing 0.1 to 3.0 mass % of Fe, 0.005 to 1.000 mass % of Cu, and 0.005 to 1.000 mass % of Zn, with a balance of Al and inevitable impurities, wherein in an outer peripheral surface thereof, the number of holes having max...

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Bibliographische Detailangaben
Hauptverfasser: HATAKEYAMA, Hideyuki, OTA, Hiroki, YONEMITSU, Makoto, MURATA, Takuya, SAKAMOTO, Ryo, KITAWAKI, Kotaro
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
METALLURGY
PHYSICS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Zusammenfassung:An aluminum alloy substrate for a magnetic disk including an aluminum alloy containing 0.1 to 3.0 mass % of Fe, 0.005 to 1.000 mass % of Cu, and 0.005 to 1.000 mass % of Zn, with a balance of Al and inevitable impurities, wherein in an outer peripheral surface thereof, the number of holes having maximum diameters of 10 μm or more is 200/mm2 or less, an aluminum alloy base disk for a magnetic disk and a magnetic disk, using the aluminum alloy substrate, and methods for manufacturing these.