Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 6, Pages 6215-6221Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.01.041
Keywords
Sintering; Composites; Mechanical properties; Toughness and toughening
Categories
Funding
- NSFC [90923001]
- Programme 111 [B12016]
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Alumina (Al2O3) ceramic composites reinforced with graphene platelets (GPLs) were prepared using Spark Plasma Sintering. The effects of GPLs on the microstructure and mechanical properties of the Al2O3 based ceramic composites were investigated. The results show that GPLs are well dispersed in the ceramic matrix. However, overlapping of GPLs and porosity within ceramics are observed. The flexural strength and fracture toughness of the GPL-reinforced Al2O3 ceramic composites are significantly higher than that of monolithic Al2O3 samples. A 30.75% increase in flexural strength and a 27.20% increase in fracture toughness for the Al(2)O(3)ceramic composites have been achieved by adding GPLs. The toughening mechanisms, such as pull-out and crack deflection induced by GPLs are observed and discussed. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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