Speaker cone plate and method of forming

Details Speaker cone plate and method of forming Speaker cone plate and method of forming

1989-03-17

1991-02-26

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Composite

Of metal

428368, 428698, 428472, 428689, 428902, 427 34, 4273763, 4273764, 264DIG50, 264DIG57, 264570, 264 60, 181167, 181170, 181173, B32B 1504, G10K 1300, B29C 4310, B05D 302

Patent

active

049961195

ABSTRACT:
A speaker cone plate is provided with an inorganic surfacial hard layer formed at least on a face of a metal substrate and is subjected to a reinforcing treatment by hot isostatic pressing, wherein the surfacial hard layer may be composed of a carbide, an oxide, a borie or a phosphide or may be formed by plasma thermal spraying of an inorganic substance containing silicon nitride whiskers or silicon carbide whiskers.

REFERENCES:
patent: 4315858 (1982-09-01), Hunold et al.
patent: 4317850 (1982-03-01), Verburgh et al.
patent: 4652413 (1987-03-01), Tiegs
Metals Handbook vol. 7 Jun. 1984 "Hot Isostatic Pressing of Metal Powders" pp. 419-443, note pp. 424 & 436.

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