[특허]Filament-containing composite

[미국특허] Filament-containing composite 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-009/00 B05D-003/02
출원번호	US-0100806 (1987-09-24)
발명자 / 주소	Singh Raj N. (Schenectady NY) Morrison William A. (Albany NY)
출원인 / 주소	General Electric Company (Schenectady NY 02)
인용정보	피인용 횟수 : 49 인용 특허 : 0

초록 ▼

Boron nitride is coated on filaments of elemental carbon and/or silicon carbide, the coated filaments are contacted with an infiltration-promoting material containing elemental carbon to produce a preform wherein the filaments are substantially parallel and each filament is enveloped with infiltration-promoting material, and the preform is infiltrated with molten silicon to produce a composite containing boron nitride coated filaments.

대표청구항 ▼

A process for producing a composite with a porosity of less than about 10% by volume comprised of boron nitride-coated filaments and a matrix phase, said filament component of said coated filaments comprising at least about 10% by volume of the composite, said matrix phase containing silicon carbide formed in situ in an amount of at least about 5% by volume of the composite and elemental silicon in an amount of at least about 1% by volume of the composite, which comprises the following steps: (a) providing a filament selected from the group consisting of elemental carbon, a SiC-containing material containing at least about 50% by weight silicon and at least about 25% by weight carbon, and a combination thereof, said filament having a diameter of at least about 50 microns; (b) depositing a coating of boron nitride on said filament leaving no significant portion thereof exposed; (c) providing infiltration-promoting material in the form of particulates and/or fibers, said infiltration-promoting material containing elemental carbon; (d) contacting a plurality of said boron nitride-coated filaments with said infiltration-promoting material to produce a preform wherein said infiltration-promoting material envelops each coated filament preventing contact therebetween and wherein said coated filaments are at least substantially parallel to each other, said preform having an open porosity ranging from about 25% by volume to about 85% by volume of the preform; (e) contacting said preform with silicon-associated infiltrating means whereby said silicon is infiltrated into said preform; (f) heating the resulting structure in a partial vacuum to a temperature at which said silicon is molten and infiltrating said molten silicon into said preform to produce an infiltrated product having the composition of said composite, said preform containing sufficient elemental carbon to react with said silicon to form said composite, said partial vacuum being at least sufficient to remove gas from said preform so as to allow said molten silicon to infiltrate said preform; and (g) cooling said product to produce said composite, said boron nitride-coated filaments being enveloped by said infiltration-promoting material to enable said infiltration by molten silicon.

이 특허를 인용한 특허 (49) 인용/피인용 타임라인 분석

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[미국특허] Filament-containing composite 원문보기

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