Compositions: ceramic – Ceramic compositions – Carbide or oxycarbide containing
Patent
1990-07-23
1992-03-24
Dixon, Jr., William R.
Compositions: ceramic
Ceramic compositions
Carbide or oxycarbide containing
501 96, 501127, 501128, 501134, 75235, 264 65, 264 60, 423625, 423412, 419 2, 419 23, 419 57, C04B 3510
Patent
active
050988700
ABSTRACT:
This invention relates generally to a novel method of preparing self-supporting bodies and to the novel products made thereby. In its more specific aspects, this invention relates to a method of producing self-supporting bodies having controlled porosity and graded properties and comprising one or more boron-containing compounds, e.g., a boride or a boride and a carbide. The method comprises, in one embodiment, reacting a powdered parent metal, in molten form, with a bed or mass comprising a boron carbide material and, optionally, one or more inert fillers, to form the body. In another embodiment, both of a powdered parent metal and a body or pool of molten parent metal are induced to react with a bed or mass comprising a boron carbide material and, optionally, one or more inert fillers. in addition, combustible additives (e.g., gelatin, corn starch, wax, etc.) can be mixed with the bed or mass comprising a boron carbide material to aid in the porisity producing process. When the self-supporting body of the instant invention is formed while in contact with a previously formed ceramic, metal or composite body, a bond can be formed between the two bodies, thus creating a macrocomposite body.
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Claar Terry D.
Johnson William B.
Bonner C. Melissa
Dixon Jr. William R.
Lanxide Technology Company, LP
McShane William E.
Mortenson Mark G.
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