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Oxidation Resistance and High Temperature Thermal Insulation of a Polymeric Precursor Derived BN/SiC Ceramics Foam
Alternative TitleJ. Inorg. Mater.
Shen Zhi-Xun1,2; Ge Min1; Chen Ming-Wei1,2; Qian Yang-Bao1; Zhang Wei-Gang1
2012-12-01
Source PublicationJOURNAL OF INORGANIC MATERIALS
ISSN1000-324X
Volume27Issue:12Pages:1306-1312
AbstractA 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.; 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.
KeywordSilicon Carbide Boron Nitride Porous Ceramics Heat Insulation Performance
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.3724/SP.J.1077.2012.12076
URL查看原文
Indexed BySCI
Language英语
WOS KeywordBORON-NITRIDE ; MECHANICAL-PROPERTIES ; COMPOSITES ; FABRICATION ; BEHAVIOR ; DESIGN
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000313396600013
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6422
Collection研究所(批量导入)
Affiliation1.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
Recommended Citation
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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