Patent ID: 7901775
Filing Date: 2011-03-08
Classification: B32B,C04B,C08K,Y10T

Abstract:
1. A calcinated C/C composite material comprising: a plurality of identical layers, each layer having at least two pairs of parallel and opposing side surfaces and being formed of a carbonaceous material comprising carbon fiber and a matrix; and at least one void-forming core surrounded by a pair of adjacent layers of the plurality of layers, wherein the at least one void-forming core is made of a material that is burnt out at lower temperatures than a calcination temperature to form a void which defines openings in at least one side surface of each pair of side surfaces of said each layer after the C/C composite material is subjected to calcination, wherein the void contains air that thermally insulates the C/C composite material; and wherein the plurality of layers are laminated on top of each other and the at least one void-forming core extends between opposing surfaces of each pair of adjacent layers to form the void between the opposing surfaces of each pair of adjacent layers.