Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 36, Issue 16, Pages 3889-3893Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2016.05.036
Keywords
SiC; Calcium hexaluminate; Porous composites; Foaming; Reaction bonding
Categories
Funding
- National Natural Science Foundation of China (NSFC) [51272240, 51202225, 51402265]
- International S&T Cooperation Program of China (ISTCP) [2014DFA50240]
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Porous SiC/calcium hexaluminate (CA(6), where C = CaO and A = Al2O3) composites were successfully prepared via two steps: (i) preparation of green body by direct foaming combined with pure calcium aluminate cement curing method at room temperature and (ii) sintering by in-situ formed CA(6) phase at relatively low temperature (1500 degrees C). The phase compositions, total porosity, compressive strength and the microstructure of porous SiC/CA(6) composites with different composition and sintered at different temperatures were investigated. CA(6) phase with plate-like morphology was the main bonding phase in the porous composites, and a compressive strength of 14.0 +/- 0.6 MPa was achieved with a total porosity of 82.9%. (C) 2016 Elsevier Ltd. All rights reserved.
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