US 2018/0025919 A1 · METHOD FOR PRODUCING SILICON CARBIDE COMPOSITE MATERIAL

Abstract

A silicon carbide composite that is lightweight and has high thermal conductivity as well as a low thermal expansion coefficient close to that of a ceramic substrate, particularly a silicon carbide composite material suitable for heat dissipating components that are required to be particularly free of warping, such as heat sinks. A method for manufacturing a silicon carbide composite obtained by impregnating a porous silicon carbide molded body with a metal having aluminum as a main component, wherein the method for manufacturing a silicon carbide composite material is characterized in that the porous silicon carbide molded article is formed by a wet molding method, and preferably the wet molding method is a wet press method or is a wet casting method.

Claims1

Dependent claims

A method for manufacturing a silicon carbide composite formed by impregnating a metal having aluminum as a main component in a porous silicon carbide molded body, wherein the porous silicon carbide molded body is formed by obtaining a slurry from a silica sol;

a silica sol gelling agent which is a polyalkylene glycol including a styrene-maleic anhydride copolymer or a derivative thereof;
and a silicon carbide powder having a particle size of 10-200 μm, drying a wet preform obtained from the slurry via a wet press method or a wet casting method at a drying temperature of no less than 80° C. to less than 100° C., followed by further firing the dried wet preform at 800° C. to 1100° C., and impregnating the porous silicon carbide molded body with a metal having aluminum as a main component.

Dependencies are inferred from the claim text.

Facts

Application

15/535,627Filed 10 Dec 2015

Priority

JP 2014-25620118 Dec 2014

Published

25 Jan 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification35 codes

H10W 99/00
Subject matter not provided for in other groups of this subclass
B22D 19/16
Casting in, on, or around objects which form part of the product: for making compound objects cast of two or more different metals, e.g. for…
B22D 21/007
Castings of light metals: with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
B28B 1/14
Producing shaped prefabricated articles from the material: by simple casting, the material being neither forcibly fed nor positively compacted

Method for producing silicon carbide composite material

Life of this patent

Method for producing silicon carbide composite material

Life of this patent

Abstract

Claims1