Clad magnetic memory disk substrate

Details Clad magnetic memory disk substrate Clad magnetic memory disk substrate

1986-04-28

1988-02-02

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

148 115A, 148 115Q, 148440, B32B 1520, C22F 104

Patent

active

047228725

ABSTRACT:
A magnetic memory disk substrate which maintains a high degree of surface smoothness together with high yield strength is prepared by cladding a core material with a cladding layer containing a maximum of about 3% magnesium. The core material is aluminum alloyed with one or more elements such as zinc, magnesium, copper and silicon to produce an improved yield strength. The cladding comprises from about 3% to about 10% per side of the thickness of the entire composite and generally contains further alloying elements for enhanced corrosion resistance. Silicon impurities generally amount to less than 0.5%.

REFERENCES:
patent: 3418090 (1968-12-01), Fritzlen
patent: 3471272 (1969-10-01), Wilhelm et al.
patent: 3595631 (1971-07-01), Broverman
patent: 3881883 (1975-05-01), Fritzlen
patent: 4430387 (1984-02-01), Nakagawa et al.

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