Boron nitride-boron nitride composites

Details Boron nitride-boron nitride composites Boron nitride-boron nitride composites

1974-02-27

1978-02-21

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264 60, 264 65, 264171, C04B 3558

Patent

active

040752763

ABSTRACT:
Boron nitride-boron nitride composite bodies may be produced by combining pure boron nitride fibers with partially nitrided fibers consisting essentially of B, N, O, and H, and hot pressing the composite at elevated temperatures and pressure. The partially nitrided material serves as a source of matrix material for the boron nitride fibers, and when fiber orientation is properly controlled, bodies of extremely high strength may be obtained. Densities in excess of 1.5 g./cc. may be obtained, in a one-step process which overcomes difficulties inherent in multiple-step nitriding and re-nitriding processes.

REFERENCES:
patent: 3429722 (1969-02-01), Economy et al.
patent: 3668059 (1972-06-01), Economy et al.
patent: 3720740 (1973-03-01), Muta et al.
patent: 3734997 (1973-05-01), Mandorf, Jr. et al.
patent: 3837997 (1974-09-01), Economy et al.

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