期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 38, 期 11, 页码 3752-3758出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2018.04.037
关键词
ZrC-SiC; Graphene network; Slurry infiltration; Spark plasma sintering; Multiscale toughening
资金
- National Natural Science Foundation of China [11572105]
- National Fund for Distinguished Young Scholars [51525201]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [11421091]
- Major State Basic Search Program [2014CB46505]
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments [KL.PYJH.2017.002]
Graphene is one of the important candidates in ceramic toughening due to its outstanding physical and chemical properties. For the weak interface toughening of large-diameter graphene sheet and alleviation of the interfacial reaction between ceramic precursors and graphene sheets during high-temperature pyrolysis, ZrC-SiC-Graphene composite was synthesized via a facile technology of infiltrating ceramic slurry instead of ceramic precursor into macroporous graphene network and spark plasma sintering. The incorporation of the graphene network improved fracture toughness, critical crack size, and fracture energy of ZrC-SiC ceramic. The multiple length-scale toughening mechanisms of ZrC-SiC Graphene composite include the macroscopic toughening mechanism of crack deflection and bifurcation and the micro toughening mechanism of graphene bridging, ceramic micro zone tearing, graphene pull-out, graphene and ceramic brick slipping.
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