Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 789, Issue -, Pages 755-761Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.03.147
Keywords
C-f/ZrB2-SiC; Nano slurry brushing; Low-temperature sintering; Mechanical properties
Categories
Funding
- National Natural Science Foundation of China [51872059, 51772061, 11572353]
- National Fund for Distinguished Young Scholars [51525201]
- State Key Laboratory of Advanced Welding and Joining [17-M-07]
- Fundamental Research Funds for the Central Universities [HIT.-BRETIII. 201506]
- Major State Basic Search Program [2014CB46505]
- Major Projects of Natural Science Research in Anhui Province [KJ2017ZD50]
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The C-f/ZrB2-SiC composite was successfully fabricated via brushing nano ZrB2-SiC slurry followed by low-temperature hot pressing technique, in which the UHTC phases were uniformly introduced into intrafascicular space of the subdivided fiber bundles. The fabricated composite exhibited a non-brittle fracture behavior and excellent mechanical properties with a high work of fracture of 1338 J/m(2), one order of magnitude higher than that of the ZrB2-SiC ceramic, which was attributed to the hybrid toughening mechanisms such as crack deflection, fiber bridging, fiber pull-out and crack branching. The fiber/matrix interfaces were analyzed by the high resolution transmission electron microscopy, and no obvious chemical reaction was detected, suggesting the degradation of carbon fiber was effectively inhibited. Moreover, the C-f/ZrB2-SiC composite showed a good thermal shock resistance with a thermal shock temperature difference of 764 degrees C, almost twice those of the ZrB2-SiC ceramic. This work provides a facile and effective approach to fabricate high-performance continuous carbon fiber reinforced ceramic composites with uniform component distribution. (C) 2019 Elsevier B.V. All rights reserved.
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