Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 748, Issue -, Pages 36-43Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.03.122
Keywords
SiC; Porous ceramics; Spark plasma sintering; Grain growth
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Funding
- National Natural Science Foundation of China [51602126, 51621091, 51372099]
- Program for Scientific research innovation team in Colleges and universities of Shandong Province
- Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure [SKL201601SIC]
- China Postdoctoral Science Foundation [2016M602184]
- 111 Project of International Corporation on Advanced Cement-based Materials [D17001]
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6H-SiC porous SiC ceramics accompanied by the formation of large clubbed and tabular grains were successfully fabricated at 1800 degrees C under an applied pressure of 50 MPa for 5 min by spark plasma sintering technique without introducing any pore-creating agent. The phase composition, microstructure and properties of porous SiC ceramics were investigated. The measured porosity of the specimens was 35.7% and the mean pore size varied in the range of 0.3-3 mu m. The sintered specimen had a strength of 103 MPa, a fracture toughness of 2.89 MPam(1/2), and a density of 1.85g/cm(3). The mechanisms of porous structure and grain growth were elucidated. (C) 2018 Elsevier B.V. All rights reserved.
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