Method of producing Al-Zn-Mg magnetic memory disk substrates

Details Method of producing Al-Zn-Mg magnetic memory disk substrates Method of producing Al-Zn-Mg magnetic memory disk substrates

1986-04-28

1987-10-13

Andrews, Melvyn J.

Metal treatment

Compositions

Heat treating

148 115A, 148159, 420541, C22F 104

Patent

active

046996729

ABSTRACT:
Computer memory disk substrates which can be age hardened to a high yield strength after thermal flattening and yet are essentially free of magnesium silicide constituents detrimental to surface smoothness are prepared by replacing a portion of the magnesium usually includes in high amounts as an alloying element with zinc.

REFERENCES:
patent: 3466156 (1969-09-01), Peters et al.
patent: 3542606 (1970-11-01), Westerman et al.
patent: 4431461 (1984-02-01), Hoshino et al.

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