Optimizing mechanical and thermal expansion properties of carbon/carbon composites by controlling textures

Published on Oct 1, 2020in Current Applied Physics2.281
· DOI :10.1016/J.CAP.2020.08.002
Tiyuan Wang5
Estimated H-index: 5
(NPU: Northwestern Polytechnical University),
Shouyang Zhang19
Estimated H-index: 19
(NPU: Northwestern Polytechnical University)
+ 3 AuthorsHejun Li68
Estimated H-index: 68
(NPU: Northwestern Polytechnical University)
Source
Abstract
Abstract The present study explored the effect of medium texture (MT) content on flexural properties and thermal expansion coefficients (CTES) of carbon/carbon (C/C) composites with multilayered pyrolytic carbon. The specimen with 39% MT exhibited maximum flexural strength of 221.55 MPa, increasing by 52% compared with pure high texture. While the flexural strength decreased when the MT content exceeded 39%. The excellent strength can be attributed to crack deflection between multilayered texture and the strong interface bonding between fibers and matrix. Moreover, the four specimens expressed a similar trend of CTES in the direction of XY and Z. In the direction of XY, the specimen with 39% MT had the lowest CTES from 800 °C to 2100 °C. Therefore, the C/C composites with 39% MT have the best mechanical and thermal expansion properties, which means that the properties of C/C composites can be optimized by controlling the texture.
References35
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