Synthesis of Fiber-Like SiС by Carbothermal Reduction of Used Silica Bricks

Zi He Pan; Zhao Hui Huang; Wen Juan Li; Yan Gai Liu; Ming Hao Fang

doi:10.4028/www.scientific.net/KEM.512-515.7

Paper Titles

Preface

Preparation and Characterization of High Purity β-SiC Powder
p.3

Synthesis of Fiber-Like SiС by Carbothermal Reduction of Used Silica Bricks
p.7

Microwave Synthesis of Nano SiC Doping Mg(B_1-2x(SiC)_x)₂ Superconductor and Superconductivity
p.11

Preparation of Both Reactive α-Si₃N₄ and SiC Mixed Powder in Flame-Isolation Nitridation Shuttle Kiln
p.17

Synthesis of AlN Powder from Precipitation Precursor by Carbon Thermal Reduction in Flowing Nitrogen
p.24

Single Phase Ti₂AlC Powder Synthesized from Ti-Al-0.6~0.9TiC-0.1Sn Mixture
p.28

Synthesis of Ti(C,N) Powder via CRN Method from Rutile/Carbon Mixtures
p.32

Influence of the Dispersant on the Bead Milling of Alumina
p.36

HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Synthesis of Fiber-Like SiС by Carbothermal...

Synthesis of Fiber-Like SiС by Carbothermal Reduction of Used Silica Bricks

Abstract:

Fiber-like SiC had been synthesized using used silica bricks and carbon powder as raw materials by carbothermal reduction. A new kind of beaded SiC also had been found in the specimen. The result showed that well-crystallized β-SiC fibers began to appear at 1550 °C with excessive of 100 wt% content of carbon. While at 1600 °C for 6 h with excessive of 100 wt% content of carbon, the as-synthesized SiC fibers were grown with some beads in the fiber strings. The beaded SiC consisted of strings with diameters of less than 0.5 μm (or even 0.1μm) and periodic beads with diameters of 0.5-1.0 μm. Vapor-solid (VS) mechanism and vapor-liquid-solid (VLS) mechanism were also discussed in the synthesizing process of fiber-like SiC. This kind of fiber-like SiC may used as reinforce materials in ceramic composites, the fracture toughness of brittle ceramics can be effectively improved via the incorporation of strong SiC fibers into the matrix due to crack deflection, bridging and fiber pull-out. Moreover, these toughening mechanisms do not diminish as temperature increases.

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Periodical:

Key Engineering Materials (Volumes 512-515)

Pages:

7-10

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.7

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Online since:

June 2012

Authors:

Zi He Pan, Zhao Hui Huang, Wen Juan Li, Yan Gai Liu, Ming Hao Fang

Keywords:

Beaded, Carbothermal Reduction, Fiber-Like, Growth Mechanism, Silicon Carbide (SiC)

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References

[1] Z.H. Pan, Z.H. Huang, W.J. Li, Y.G. Liu and M.H. Fang, Phase Behavior of Silica Brick Used in Carbothermal Reduction, Key Engineering Materials 492 (2012) 472-475.

DOI: 10.4028/www.scientific.net/kem.492.472

Google Scholar

[2] S.J. Dhage, H.C. Lee, M.S.S. Hassan, M.S. Akhtar, C.Y. Kim, J. M. Sohn, K.J. Kim, H.S. Shin, and O.B. Yang, Formation of SiC nanowhiskers by carbothermic reduction of silica with activated carbon. Mater. Lett. 63 (2009) 174-176.

DOI: 10.1016/j.matlet.2008.09.056

Google Scholar

[3] Y.J. Hao, J.B. Wagner, D.S. Su, G.Q. Jin and X.Y. Guo, Beaded silicon carbide nanochains via carbothermal reduction of carbonaceous silica xerogel. Nanotechnol. 17 (2006) 2870-2874.

DOI: 10.1088/0957-4484/17/12/008

Google Scholar

[4] J.Z. Guo, Y. Zuo, Z.J. Li, W.D. Gao, J.L. Zhang, Preparation of SiC nanowires with fins by chemical vapor deposition. Physica E. 39 (2007) 262-266.

DOI: 10.1016/j.physe.2007.06.033

Google Scholar