Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 36, Issue 14, Pages 3513-3522Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2016.05.015
Keywords
Fracture toughness; Fiber-reinforced composite; Carbon fiber; Electron microscopy; Mechanism of interfacial formation
Categories
Funding
- National Natural Science Foundation of China [51172050, 51102060, 51302050]
- Fundamental Research Funds for the Central Universities [HIT. ICRST.2010009]
- Natural Scientific Research Innovation Foundation in Harbin Institute of Technology [HIT.NSRIF.2014129]
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Boron doped carbon fibers reinforced lithium aluminosilicate matrix composites (C-f/LAS) were prepared by slurry infiltration combining with hot pressing procedure. The doping of boron significantly enhances the fracture toughness and fracture work of the C-f/LAS composites, which could reach the highest fracture toughness of 25.0 +/- 0.4 MPa m(1/2) and the work of fracture of 24.5 +/- 2.8 kJ/m(2), respectively. The work of fracture of boron doped C-f/LAS composites is 2.2 times of that of the boron free C-f/LAS composites. The fracture mode of C-f/LAS composites changed from ductile fracture to brittleness fracture with increasing the boron content from 0 to 4 wt%. The connection of the fracture behavior and the interfacial microstructure was examined to establish a direct relationship among interfacial microstructure, interfacial chemistry and fracture behavior of the studied composites. (C) 2016 Elsevier Ltd. All rights reserved.
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