| 摘要 |
PROBLEM TO BE SOLVED: To provide a crucible for pulling up a single crystal having not only, a cylindrical body part but also a bowl-like bottom part composed of C/C composite material reinforced by filament-winding method. SOLUTION: This crucible for pulling up a single crystal composed of a fiber-reinforced carbon composite material is constituted of two or more suits of combinations obtained by combining filament windings of not only a circumferential direction reinforcing layer 23 but also axial direction reinforcing layers 22 and 26. The axial direction reinforcing layers 22 and 26 are formed by at least one of a level-winding 26 or a polar-winding 22 having 0 deg.-10 deg. winding angle against a center axis 16, and the circumferential direction reinforcing layer 23 is formed by at least one of a parallel winding 23 or a helical winding having 70 deg.-90 deg. winding angle against the center axis. The axial direction reinforcing layers 22 and 26 cover the center 17 of the bottom, and thereby the crucible having no hole and integrally composed of C/C composite material is obtained. A thermally decomposing carbon penetrates and also covers the surface of the C/C composite material. |
