Preparation and Mechanical Properties of Graphene Nanosheet Reinforced Alumina Composites

Dense graphene nanosheets (GNSs)/Al2O3 composites have been prepared by spark plasma sintering from ball milled expanded graphite and Al2O3 powder. GNSs have been found to be homogeneously distributed in the alumina matrix. Results show that the introduction of GNSs leads to obvious refinement of Al...

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Published in:Advanced engineering materials 2015-01, Vol.17 (1), p.28-35
Main Authors: Liu, Xia, Fan, Yu-Chi, Li, Jian-Lin, Wang, Lian-Jun, Jiang, Wan
Format: Article
Language:English
Subjects:
Aluminum oxide
Ball milling
GNSS
Graphene
Graphite
Mechanical properties
Nanostructure
Spark plasma sintering
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container_title Advanced engineering materials
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creator Liu, Xia
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description Dense graphene nanosheets (GNSs)/Al2O3 composites have been prepared by spark plasma sintering from ball milled expanded graphite and Al2O3 powder. GNSs have been found to be homogeneously distributed in the alumina matrix. Results show that the introduction of GNSs leads to obvious refinement of Al2O3 grains and improvement of mechanical properties of the as‐prepared composites. Compared with monolithic Al2O3, the flexural strength, fracture toughness, and Vickers hardness of as‐prepared GNSs/Al2O3 samples have been improved by 103, 25, and 26%, respectively, which are attributed to the grain refinement, strong interfacial bonding, and pull‐out of GNSs from the matrix. Dense graphene nanosheets (GNSs)/Al2O3 composites have been prepared by spark plasma sintering from ball milled expanded graphite and Al2O3 powder. Large‐scale preparation and homogeneous dispersivity of GNSs can be realized by one‐step. Results show that the introduction of GNSs leads to obvious refinement of Al2O3 grains and improvement of mechanical properties of the as‐prepared composites.
doi_str_mv 10.1002/adem.201400231
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subjects Aluminum oxide
Ball milling
GNSS
Graphene
Graphite
Mechanical properties
Nanostructure
Spark plasma sintering
title Preparation and Mechanical Properties of Graphene Nanosheet Reinforced Alumina Composites
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