CPC G11B 5/73913 (2019.05) [C22C 21/06 (2013.01); C22C 21/10 (2013.01); C22C 21/12 (2013.01); C22F 1/047 (2013.01); C22F 1/053 (2013.01); C22F 1/057 (2013.01); G11B 5/73919 (2019.05)] | 14 Claims |
1. An aluminum alloy substrate for a magnetic disk, the aluminum alloy substrate comprising an aluminum alloy comprising 0.4 to 3.0 mass % of Fe, preferably one or more selected from a group consisting of 0.1 to 0.4 mass % of Si and 0.01 to 1.00 mass % of Zr, and a balance of Al and unavoidable impurities,
wherein second phase particles having a longest diameter of 0.5 μm or more and less than 2.0 μm are dispersed at a distribution density of 5000 particles/mm2 or more.
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