The Study of Stabilized PAN Fabrics and Its Carbonized Fabrics Reinforced Phenolic Resin to make 2D Carbon/Carbon Compsites

• Main Authors: Chang,Ching Le, 張慶利
• Other Authors: Ko,Tse Hao
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/90837015422074215834

碩士 === 逢甲大學 === 紡織工程研究所 === 81 === 2-D carbon / carbon composites were prepared with phenol - formaldehyde resin , one kind of commercial stabitized PAN fabric and its carbonized fabrics, which well carbonized and graphitized in our laboratory. The effect of carbonization and and graphitization on the microstructure, fracture behavior and and flexural strength of the composites during the pyrolysis were studied. In this study, the stabilized PAN fabrics were carbonized and graphitized to 400■、600■、800■、1000■ 、1300■ 、2000■、and 2500■，respectively . The composites were made from a phenolic resin matrix with these fabrics, respectively. The void content of the composites played an important role on void content and cracks of the composites, when the composites were carbonized up to 600■ ,the void content increased remarkable . During carbonization, the shrinkages of the matrix were inhibited due to existence of the chemical bonding between the fibers and the matrix.Because of the strong interface in the fibers and the matrix, the weight loss of composites were less than that of the fibers and the matrix. During graphitization, interlayer spacing and the stacking size also increased with the increase in the graphitization temperature. The composites with the fabrics heat treated at a lower temperature showed a brittle fracture pattern, whereas those heat treated at a higher temperature showed a pseudo-plastic fracture with fiber pull - out. The former carbon/ carbon composites failed in mixed tensile cum shear mode and showed lower strength, owing to formation voids and cracks during carbonization. The latter composites exhibited continuous fracture and showed higher toughness. During graphitization are also.