CARBON FIBER-REINFORCED CARBON COMPOSITE CYLINDRICAL MEMBER, METHOD OF MANUFACTURING CARBON FIBER-REINFORCED CARBON COMPOSITE CYLINDRICAL MEMBER, CARBON FIBER-REINFORCED CARBON COMPOSITE MATERIAL CRUCIBLE, AND METHOD OF MANUFACTURING CARBON FIBER-REINFORCED CARBON COMPOSITE MATERIAL CRUCIBLE

摘要

PROBLEM TO BE SOLVED: To provide a carbon fiber-reinforced carbon composite cylindrical member, a method of manufacturing a carbon fiber-reinforced carbon composite cylindrical member, a carbon fiber-reinforced carbon composite material crucible, and a method of manufacturing a carbon fiber-reinforced composite material crucible, the carbon fiber-reinforced carbon composite cylindrical member being composed of a carbon fiber-reinforced carbon composite material having certain physical properties and capable of suppressing wedging of a silica glass crucible during cooling, capable of being easily removed without damage to the silica glass crucible, and also capable of suppressing silicification.;SOLUTION: A carbon fiber-reinforced carbon composite material crucible 20 used to support and hold a silica glass crucible that houses a molten material includes a bottom section 22 and a straight body section (cylindrical member) 21 provided above the bottom section. At least the straight body section (cylindrical member) is composed of a carbon fiber-reinforced carbon composite material containing a carbon-fiber woven fabric made using pitch-based carbon fibers having a tensile modulus of 400 GPa or more and 900 GPa or less. The average coefficient of linear thermal expansion in a circumferential direction of the straight body section within a temperature range of room temperature to 800°C is equal to or less than the average coefficient of linear thermal expansion of silica glass or less.;COPYRIGHT: (C)2013,JPO&INPIT