EP0322336A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for preparing selfsupporting bodies and products made thereby
Assignee: Lanxide Technology Co LP
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Filing: 1988-12-01
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Granted: —
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Expires: 2008-12-01
Abstract
Abstract Self-supporting bodies are produced by reactive infiltration of a parent metal (10) into boron carbide (12) 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 (12), 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. 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 (16) having a venting means included therein.
Inventors
- 👤 Terry Dennis Claar
- 👤 Steven Michael Mason
- 👤 Kevin Peter Pochopien
- 👤 Danny Ray White
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 11:40
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/71; C04B35/74; C04B35/515; C04B35/56; C04B35/5607; C04B35/5611; C04B35/5622; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/58078; C04B35/622; C04B35/64; C04B35/65; C04B35/652; C04B35/653; C04B41/45; C04B41/50; C04B41/5053; C04B41/5062; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C22; C22C; C22C29/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
116 words
A method for producing a self-supporting body, comprising: selecting a parent metal; heating said parent metal in a substantially inert atmosphere to a temperature above its melting point to form a body of molten parent metal; contacting said body of molten parent metal with a permeable mass comprising boron carbide and a carbon donor material; maintaining said temperature for a time sufficient to permit infiltration of molten parent metal into said permeable mass and to permit reaction of said molten parent metal with said boron carbide to form at least one boron-containing compound; and continuing said infiltration and reaction for a time sufficient to produce said self-supporting body comprising at least one parent metal boron-containing compound.
Claim 2
Independent Claim
116 words
A method for producing a self-supporting body, comprising: selecting a parent metal; heating said parent metal in a substantially inert atmosphere to a temperature above its melting point to form a body of molten parent metal; contacting said body of molten parent metal with a permeable mass comprising boron carbide and a carbon donor material; maintaining said temperature for a time sufficient to permit infiltration of molten parent metal into said permeable mass and to permit reaction of said molten parent metal with said boron carbide to form at least one boron-containing compound; and continuing said infiltration and reaction for a time sufficient to produce said self-supporting body comprising at least one parent metal boron-containing compound.
Claim 3
Dependent Claim
25 words
The method according to claim 1, wherein said carbon donor material comprises a material selected from the group consisting of graphite powder and carbon black.
Claim 4
Dependent Claim
33 words
The method according to claim 1, wherein said self-supporting body comprises a parent metal boride compound and a parent metal carbon compound, formed upon reaction of said boron carbide and said parent metal.
Claim 5
Dependent Claim
26 words
The method according to claim 1, wherein said parent metal is selected from the group of metals consisting of titanium, zirconium, hafnium, vanadium, chromium, and niobium.
Claim 6
Dependent Claim
50 words
The method according to claim 1, wherein said parent metal comprises zirconium, and said self-supporting body comprises a zirconium compound having at least one phase selected from the group of phases consisting of a boride of zirconium, and a mixture of a boride of zirconium and a carbide of zirconium.
Claim 7
Dependent Claim
23 words
The method according to claim 1, wherein said carbon donor material comprises carbon black present in an amount of about 5-75 weight percent.
Claim 8
Dependent Claim
23 words
The method according to claim 1, wherein said carbon donor material comprises carbon black present in an amount of about 5-50 weight percent.
Claim 9
Dependent Claim
23 words
The method according to claim 1, wherein said carbon donor material comprises carbon black present in an amount of about 5 weight percent.
Claim 10
Dependent Claim
20 words
The method according to claim 8, wherein said parent metal is zirconium, and a ratio of ZrB₂/ZrC is about 1.
Claim 11
Independent Claim
133 words
A method for producing a self-supporting body, comprising: selecting a parent metal; heating said parent metal in a substantially inert atmosphere to a temperature above its melting point to form a body of molten parent metal; contacting said body of molten parent metal with a mass comprising boron carbide; containing said mass of boron carbide and said body of molten parent metal within a graphite mold, said graphite mold including a venting means; maintaining said temperature for a time sufficient to permit infiltration of molten parent metal into said mass and to permit reaction of said molten parent metal with said boron carbide to form at least one boron-containing compound; and continuing said infiltration and reaction for a time sufficient to produce said self-supporting body comprising at least one parent metal boron-containing compound.
Claim 12
Independent Claim
133 words
A method for producing a self-supporting body, comprising: selecting a parent metal; heating said parent metal in a substantially inert atmosphere to a temperature above its melting point to form a body of molten parent metal; contacting said body of molten parent metal with a mass comprising boron carbide; containing said mass of boron carbide and said body of molten parent metal within a graphite mold, said graphite mold including a venting means; maintaining said temperature for a time sufficient to permit infiltration of molten parent metal into said mass and to permit reaction of said molten parent metal with said boron carbide to form at least one boron-containing compound; and continuing said infiltration and reaction for a time sufficient to produce said self-supporting body comprising at least one parent metal boron-containing compound.
Claim 13
Dependent Claim
19 words
The method according to claim 10, wherein said venting means comprises a plurality of through-holes in the graphite mold.
Claim 14
Dependent Claim
48 words
The method according to claim 10, wherein said venting means comprises a plurality of through-holes in the graphite mold, said through-holes being located in the graphite mold at a position corresponding to the direction of said infiltration reaction of the parent metal into the mass of boron carbide.
References Cited (Backward Citations)
No citation records indexed.
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