Ceramic-metal matrix composites for magnetic disk substrates for hard disk drives
AssigneeAlyn Corporation
InventorsRaymond L. Stanish, William C. Harrigan, Robin A. Carden
Life of this patent
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Abstract
A rigid disk substrate for a magnetic recording disk is formed of a ceramic-metal matrix composite. The ceramic-metal matrix composite has a composition ranging from approximately 1 to 40 weight % of ceramic material and 60 to 99 weight % of aluminum or aluminum alloy metal matrix. The ceramic material may be silicon carbide, aluminum oxide, boron carbide, magnesium oxide, silicon oxide, silicon nitride, zirconium oxide, beryllium oxide, titanium boride, titanium carbide, tungsten carbide, or combinations thereof.
Claims9
A disk substrate for magnetic disk recording media, comprising:
- a disk formed of a metal matrix composite material having a composition ranging from about 1 to 40 weight % of ceramic material and about 60 to 99 weight % of an aluminum or an aluminum alloy metal matrix material.
A magnetic recording disk comprising:
- a rigid disk substrate formed of a metal matrix composite having a composition ranging from about 1 to 40 weight % of ceramic material and about 60 to 99 weight % of an aluminum or an aluminum alloy;
- a nickel-phosphorous layer supported by the rigid disk substrate;
- and
- a magnetic recording layer covering the nickel-phosphorous layer.
Dependencies are inferred from the claim text.