Composition of matter that is hard and tough

Details Composition of matter that is hard and tough Composition of matter that is hard and tough

1987-05-26

1989-02-14

Swisher, Nancy A. B.

Stock material or miscellaneous articles

Composite

Of metal

428698, 428699, B32B 1504

Patent

active

048045837

ABSTRACT:
Hard materials are generally not tough but they are brittle. Thin film superlattices made of a hard and a tough material or two hard materials having different lattice structure are resistant to crack propagation and are both hard and tough.

REFERENCES:
patent: Re28485 (1975-07-01), Rix et al.
patent: 4066821 (1978-01-01), Cook et al.
patent: 4264682 (1981-04-01), Fuyama et al.
patent: 4708037 (1987-11-01), Bieljan et al.
patent: 4713286 (1987-12-01), Buntine et al.
patent: 4728579 (1988-03-01), Koenig

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