Journal
COMPOSITES PART B-ENGINEERING
Volume 77, Issue -, Pages 122-128Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2015.02.024
Keywords
Ceramic matrix composites; 3-Dimensional reinforcement; Impact behavior; Three point bending; Sintering
Funding
- National Natural Science Foundation of China [51303025]
- State Key Program of National Natural Science of China [51035003]
- Shanghai Natural Science Foundation [12ZR1440500]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20120075120016]
- Fundamental Research Funds for the Central Universities
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University
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Carbon fiber reinforced fused silica composites exhibit the advantages of excellent mechanical properties, high heat resistance, low thermal expansion and low density, but low impact resistance or toughness. A novel modified slurry impregnation and hot pressing (SIHP) method was adopted to fabricate a new type of three dimensional orthogonal woven structure carbon fiber reinforced silica ceramic matrix composites (3D Cf/SiO2 CMCs) with higher density and lower porosity. Physical characterization, flexural behavior, impact performance and toughening mechanism of the composites were investigated by three-point bending tests, impact tests, and scanning electron microscopy analysis. The 3D Cf/SiO2 CMC showed a higher flexural strength in both warp (201.6%) and weft (263.6%) directions than those of pure SiO2 and failed at a non-brittle mode due to the fiber debonding and pullout, and a delaminated failure of the 3D preform. The maximum impact energy absorption of the 3D Cf/SiO2 CMC was 96.9 kJ/m(2), almost 4 times as much as those for typical other carbon fiber reinforced CMCs. (C) 2015 Elsevier Ltd. All rights reserved.
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