[특허]Methods of making composite ceramic articles having embedded filler

Methods of making composite ceramic articles having embedded filler 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C04B-038/00
출원번호	US-0451581 (1995-05-26)
발명자 / 주소	Newkirk Marc Stevens (Newark DE) Zwicker Harry Richard (Glen Mills PA) Urquhart Andrew Willard (Newark DE) Biel John Peter (New Castle DE) Kuszyk Jack Andrew (Lincoln University PA) Shumaker Craig Ba
출원인 / 주소	Lanxide Technology Company, LP (Newark DE 02)
인용정보	피인용 횟수 : 33 인용 특허 : 0

초록 ▼

A method of making self-supporting ceramic composite structures having filler embedded therein includes infiltrating a permeable mass of filler with polycrystalline material comprising an oxidation reaction product obtained by oxidation of a parent metal such as aluminum. The self-supporting ceramic composite structure optionally contains therein non-oxidized constituents of the parent metal. The structure is formed by placing a parent metal adjacent to a permeable filler and heating the assembly to melt the parent metal and provide a molten body of parent metal which is contacted with a suitable oxidant. Within a certain temperature region and optionally, aided by one or more dopants in or on the parent metal, molten parent metal will migrate through previously formed oxidation reaction product into contact with the oxidant, causing the oxidation reaction product to grow so as to embed the adjacent filler and provide the composite structure. The parent metal may be provided as a body of metal placed in contact with an exterior surface of the permeable mass. Alternatively, the parent metal may be placed adjacent to the filler material by admixing a plurality of discrete bodies of parent metal (e.g., particulate metal) into the permeable mass. In this embodiment, the growth of oxidation reaction product still embeds the adjacent filler material without substantial change in the size or shape of the permeable mass, but does not result in the creation of voids at the former locations of the bodies of parent metal.

대표청구항 ▼

A method for producing a self-supporting ceramic composite structure comprising (1) a ceramic matrix obtained by oxidation of a parent metal with an oxidant comprising a nitrogen-containing gas to form a polycrystalline material comprising an oxidation reaction product of said parent metal; and (2) at least one filler embedded by said matrix, the method comprising the steps of: (a) providing a permeable mass comprising at least one filler material, at least one dopant, at least one oxidant and at least one parent metal comprising a plurality of discrete, finely divided bodies dispersed among said at least one filler material and contacting at least said oxidant; (b) heating said permeable mass to a temperature above the melting point of said parent metal but below the melting point of said oxidation reaction product to render said parent metal molten; (c) reacting the molten parent metal with said oxidant comprising a nitrogen-containing gas at said temperature to form said oxidation reaction product comprising a nitride of said parent metal, and at said temperature maintaining at least a portion of said oxidation reaction product in contact with and extending between said molten parent metal and said oxidant, to draw molten metal through the oxidation reaction product towards the oxidant so that fresh oxidation reaction product continues to form within the permeable mass at an interface between the oxidant and previously formed oxidation reaction product, thereby (1) developing said polycrystalline material and (2) forming a void at each site at which a finely divided parent metal body has oxidized; and (d) continuing said reacting for a time sufficient to enable the developing polycrystalline material to form an at least partially interconnected structure which embeds at least a portion of said at least one filler material.

이 특허를 인용한 특허 (33)

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A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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