Process for preparing self-supporting bodies and products made t

Details Process for preparing self-supporting bodies and products made t Process for preparing self-supporting bodies and products made t

1987-12-23

1990-07-10

Nelson, Peter A.

Compositions: ceramic

Ceramic compositions

Refractory

501 99, 501102, 419 2, 419 23, 419 57, C04B 3558, B22F 326

Patent

active

049406795

ABSTRACT:
Self-supporting bodies are produced by reactive infiltration of a parent metal into boron carbide typically resulting in a composite comprising a boron-containing compound and metal. The mass to be infiltrated may contain one or more inert fillers admixed with the boron carbide, or at least one carbon donor material, to produce a composite by reactive infiltration, which composite comprises a matrix of metal and boron-containing compound embedding the filler. In one embodiment of the invention, a parent metal is reactively infiltrated into a mass comprising a boron carbide material mixed with a carbon-containing compound. In this embodiment, a self-supporting composite is formed typically comprising a boron-containing compound, a carbon-containing compound, and metal. The relative amounts of reactants and process conditions may be altered or controlled to yield a body containing varying volume percents of ceramic, metal and/or porosity. The mass to be infiltrated can be contained within a refractory vessel having a venting means included therein.

REFERENCES:
patent: 3758662 (1973-09-01), Tobin et al.
patent: 3864154 (1975-02-01), Gazza et al.
patent: 4471059 (1984-09-01), Yoshino et al.
patent: 4595545 (1986-06-01), Sane
patent: 4692418 (1987-09-01), Boecker et al.
patent: 4702770 (1987-10-01), Pyzik et al.
patent: 4713360 (1987-12-01), Newkirk et al.
patent: 4718941 (1988-01-01), Halverson et al.
patent: 4777014 (1988-10-01), Newkirk et al.

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