Article ID Journal Published Year Pages File Type
5440564 Journal of the European Ceramic Society 2017 8 Pages PDF
Abstract
Silicon carbide/graphene platelet (SiC/GPLs) composites were prepared using different weight percent of GPLs filler by hot pressing (HP) technology at 2100 °C in argon. The influence of the GPLs addition on bending strength, fracture toughness and related fracture characteristics was investigated. Both the bending strength and fracture toughness increased with increasing GPLs additives. The main fracture origins - strength degrading defects were pores at the low content of platelets and combination of pores and GPLs or clusters of GPLs particles in systems with a higher content of platelets. The fracture toughness increased due to the activated toughening mechanisms mainly in the form of crack bridging and crack branching, while the crack deflection was limited. The highest fracture toughness of 4.4 MPa m1/2 was achieved at 6 wt.% of GPLs addition, which was ∼30% higher than the KIC value of the reference material.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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