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	Oxidation Resistance and High Temperature Thermal Insulation of a Polymeric Precursor Derived BN/SiC Ceramics Foam
	Shen Zhi-Xun1,2; Ge Min1; Chen Ming-Wei1,2; Qian Yang-Bao1; Zhang Wei-Gang1
刊名	JOURNAL OF INORGANIC MATERIALS
	2012-12-01
卷号	27期号:12页码:1306-1312
关键词	silicon carbide boron nitride porous ceramics heat insulation performance
ISSN号	1000-324X
其他题名	J. Inorg. Mater.
中文摘要	A kind of BN/SiC open-cell ceramic foams were fabricated from complex co-polymeric precursors of polycarbosilane and tris(methylamino)borane [B(NHCH3)(3)] using a high-pressure pyrolysis foaming technique. The obtained foams exhibited cell sizes ranging from 1 mm to 5 mm with bulk densities varying from 0.44 g/cm(3) to 0.73 g/cm(3), depending on the proportion of the starting precursors. Studies on the microstructure and thermal property of the porous ceramics showed that the addition of BN into SiC could improve dramatically the oxidation resistance from 800 to 1100 degrees C. The compression strength of the composite foams was 5-10 times higher than that of pure SiC foam, which increased with increasing of BN content in the ceramic foams. Heat insulation performance of the ceramic foam fabricated from the starting precursors with a proportion of 1:1 in weight was analyzed by a device designed for insulation performance at high-temperature. When the temperature at the center point of hot surface of the foam was 1400 degrees C, the temperature at the center point of the back achieved only 280 degrees C. The heating history of the foam was simulated by finite- difference method, and the results showed that thermal conductivity of the composite foam was 4.0 W/(m.K), which was almost identical to the experimental result.
英文摘要	A kind of BN/SiC open-cell ceramic foams were fabricated from complex co-polymeric precursors of polycarbosilane and tris(methylamino)borane [B(NHCH3)(3)] using a high-pressure pyrolysis foaming technique. The obtained foams exhibited cell sizes ranging from 1 mm to 5 mm with bulk densities varying from 0.44 g/cm(3) to 0.73 g/cm(3), depending on the proportion of the starting precursors. Studies on the microstructure and thermal property of the porous ceramics showed that the addition of BN into SiC could improve dramatically the oxidation resistance from 800 to 1100 degrees C. The compression strength of the composite foams was 5-10 times higher than that of pure SiC foam, which increased with increasing of BN content in the ceramic foams. Heat insulation performance of the ceramic foam fabricated from the starting precursors with a proportion of 1:1 in weight was analyzed by a device designed for insulation performance at high-temperature. When the temperature at the center point of hot surface of the foam was 1400 degrees C, the temperature at the center point of the back achieved only 280 degrees C. The heating history of the foam was simulated by finite- difference method, and the results showed that thermal conductivity of the composite foam was 4.0 W/(m.K), which was almost identical to the experimental result.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Materials Science, Ceramics
研究领域[WOS]	Materials Science
关键词[WOS]	BORON-NITRIDE ; MECHANICAL-PROPERTIES ; COMPOSITES ; FABRICATION ; BEHAVIOR ; DESIGN
收录类别	SCI
原文出处	://WOS:000313396600013
语种	英语
WOS记录号	WOS:000313396600013
公开日期	2013-11-28
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/6422]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shen Zhi-Xun,Ge Min,Chen Ming-Wei,et al. Oxidation Resistance and High Temperature Thermal Insulation of a Polymeric Precursor Derived BN/SiC Ceramics Foam[J]. JOURNAL OF INORGANIC MATERIALS,2012,27(12):1306-1312.
APA	Shen Zhi-Xun,Ge Min,Chen Ming-Wei,Qian Yang-Bao,&Zhang Wei-Gang.(2012).Oxidation Resistance and High Temperature Thermal Insulation of a Polymeric Precursor Derived BN/SiC Ceramics Foam.JOURNAL OF INORGANIC MATERIALS,27(12),1306-1312.
MLA	Shen Zhi-Xun,et al."Oxidation Resistance and High Temperature Thermal Insulation of a Polymeric Precursor Derived BN/SiC Ceramics Foam".JOURNAL OF INORGANIC MATERIALS 27.12(2012):1306-1312.

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