Microstructures and Properties of Porous Liquid-Phase-Sintered SiC Ceramic by Hot Press Sintering

doi:10.3390/ma12040639

SIC OpenIR

	Microstructures and Properties of Porous Liquid-Phase-Sintered SiC Ceramic by Hot Press Sintering
	Li, Yajie; Wu, Haibo; Liu, Xuejian; Huang, Zhengren
	2019-02-02
Source Publication	MATERIALS
ISSN	1996-1944
Volume	12 Issue:4
Subtype	Article
Abstract	Porous liquid-phase-sintered SiC (L-SiC) ceramics were successfully fabricated by hot press sintering (HP) at 1800 degrees C in argon, using Al2O3 and Y2O3 as oxide additions. By varying the starting coarse SiC particle size, the relationships between pore microstructures and flexural strength as well as gas permeability of porous L-SiC were examined. All the as-sintered samples possessed homogeneous interconnected pores. The porosity of porous L-SiC decreased from 34.0% to 25.9%, and the peak pore size increased from 1.1 to 3.8 m as the coarse SiC particle sizes increased. The flexural strengths of porous L-SiC ceramics at room temperature and 1000 degrees C were as high as 104.3 +/- 7.3 MPa and 78.8 +/- 5.1 MPa, respectively, though there was a decrease in accordance with their increasing pore sizes and particle sizes. Moreover, their gas permeability increased from 1.4 x 10(-14) m(2) to 4.6 x 10(-14) m(2) with the increase of pore size in spite of their decreased porosity.
Keyword	silicon carbide liquid phase sintering porosity microstructure strength
DOI	10.3390/ma12040639
Language	英语
WOS Research Area	Materials Science
Publisher	MDPI
Citation statistics	Cited Times:2[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27345
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Li, Yajie,Wu, Haibo,Liu, Xuejian,et al. Microstructures and Properties of Porous Liquid-Phase-Sintered SiC Ceramic by Hot Press Sintering[J]. MATERIALS,2019,12(4).
APA	Li, Yajie,Wu, Haibo,Liu, Xuejian,&Huang, Zhengren.(2019).Microstructures and Properties of Porous Liquid-Phase-Sintered SiC Ceramic by Hot Press Sintering.MATERIALS,12(4).
MLA	Li, Yajie,et al."Microstructures and Properties of Porous Liquid-Phase-Sintered SiC Ceramic by Hot Press Sintering".MATERIALS 12.4(2019).

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