Journal
SCRIPTA MATERIALIA
Volume 114, Issue -, Pages 98-102Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.12.008
Keywords
Ceramic matrix composites; Spark plasma sintering; Electrical properties; Mechanical properties; Graphene nanoplatelet
Categories
Funding
- National Natural Science Foundation of China [91326102]
- Science and Technology Development Foundation of China Academy of Engineering Physics [2013A0301012]
- Science and Technology Innovation Research Foundation of Institute of Nuclear Physics and Chemistry
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B4C composites containing 1-4 vol.% graphene nanoplatelet (GNP) were fabricated aiming at obtaining electrically conductive B4C composites with high toughness. The electrical conductivity of B4C composite was enhanced remarkably with the addition of only 2 vol.% GNPs. Besides, all the GNP/B4C composites maintained high Vickers hardness. The fracture toughness kept increasing with the increase of GNPs volume fraction and a high value of 5.26 MPa.m(1/2) was obtained in GNP/B4C composite with 4 vol.% GNPs. The main toughening mechanisms include GNPs pull-out, crack deflection and crack bridging. (C) 2015 Elsevier Ltd. All rights reserved.
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