Ceramics-Silikáty 63, (2) 232 - 238 (2019) |
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EFFECTS OF NH₄HCO₃ CONTENTS ON THE PROPERTIES OF SiC POROUS CERAMICS REINFORCED WITH WHISKERS
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Zhai Yingying 1,2, Ma Beiyue 2, Zhang Yaran 2, Ren Xinming 2, Wu Hua 2, Qian Fan 3, Yang Wengang 3, Liu Guoqi 3, Zhu Qiang 4
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1 Computing Center, Northeastern University, Shenyang 110819, P.R. China
2 School of Metallurgy, Northeastern University, Shenyang 110819, P.R. China
3 State Key Lab for Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Luoyang 471039, P.R. China
4 Electron Microscope Unit, Mark Wainwright Analytical Centre, The University of New South Wales, Sydney, NSW 2032, Australia
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SiC porous ceramics (SPCs) were prepared from crystalline silicon cutting slurry waste with NH₄HCO₃ (NHC) as the pore-forming agent. The effects of NHC contents on the properties of the as-prepared SPCs were investigated. It was found that the main crystalline phase of the SPCs was β-SiC. The SPCs consisted of SiC particles and SiC whiskers. The thermal shock resistance of the SPCs was obviously strengthened due to the formation of the SiC whisker. When NHC contents were increased to 30 wt.%, the cold compressive strength and thermal shock resistance of the SPCs with porosity of around 63.76% were found to be favourable to the application in the molten metal filtration field. |
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doi: 10.13168/cs.2019.0015
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