(Science and Technology on Advanced Functional Composites Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China) (Beijing University of Chemical Technology, Beijing 100029, China) (Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China)
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DOI:
10.7502/j.issn.1674-3962.2012.08.02
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Abstract:
To resolve the basic application problems of carbon fibers in ablative heat protection composites, the high temperature revolution of the structures, elemental contents and surface features of carbon fibers were discussed and their mechanical and thermal physical properties were also given. The influence of ash content on the mechanical and anti oxidation properties of carbon fibers was disclosed. The microstructure development of carbon fibers, influenced by carbon matrix, was determined during the formation process of C/C composites. The mechanical performance of C/C composite was influenced by the surface features of the carbon fibers used as the raw materials. The carbon fibers with high mechanical performance can prevent their fracture during ablation. By control the maximum heat treat temperature during the manufacture of C/C composites, their mechanical performance can be increased.