Formation Mechanism of Interior Microflaws in the Preparation of Polymer-Derived Silicon Carbide Fibers

Zeng Yong Chu; Hai Feng Cheng; J. Wang; Yong Cai Song; Yan Dong Wang; C.X. Feng

doi:10.4028/www.scientific.net/KEM.280-283.1297

Paper Titles

On the Theoretical Model for Radar Absorbing Property of SiC
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Investigation on Superposition Rule and Influence of Multi-Thermal-Source Temperature Field on SiC Synthesizing
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Preparation of Oriented Porous Silicon Carbide Bodies by Freeze-Casting Process
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Gelcasting of Aqueous Silicon Carbide / Carbon Black Slurry
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Formation Mechanism of Interior Microflaws in the Preparation of Polymer-Derived Silicon Carbide Fibers
p.1297

Fabrication and Characterization of Porous Mullite Coating on Porous Silicon Carbide Support
p.1301

Characterization of Fiber-Reinforced SiC Composites by Precursor-Pyrolysis and Hot-Pressing
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SiC Coatings Deposited by RF Magnetron Sputtering
p.1309

Ultra-Fine Treatment of SiC Powder and Its Effect on Microstructure and Properties of SiC Ceramic
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 280-283Formation Mechanism of Interior Microflaws in the...

Formation Mechanism of Interior Microflaws in the Preparation of Polymer-Derived Silicon Carbide Fibers

Abstract:

Microflaws were detected on the cross-section of polymer-derived silicon carbide fibers and their formation mechanism was studied by varying the curing degree and the firing rate. The results show that microflaws decrease in size with increase of the curing degree due to an increased ceramic residue. The results also show that microflaws decrease in size with decrease of the firing rate. No microflaws are detectable when the firing rate is as low as 10K/h. This indicates that the microflaws are the main channels of evolution gases and the pressure of these gases leads to their formation and propagation. So a high curing degree and a low firing rate are both preferred in the preparation of dense silicon carbide fibers.

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Key Engineering Materials (Volumes 280-283)

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1297-1300

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.1297

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Online since:

February 2007

Authors:

Zeng Yong Chu, Hai Feng Cheng, J. Wang, Yong Cai Song, Yan Dong Wang, C.X. Feng

Keywords:

Micro Flaw, Polymer Derived Ceramics, Silicon Carbide Fiber

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