Paper Title:
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.

  Info
Periodical
Key Engineering Materials (Volumes 280-283)
Edited by
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Pages
1297-1300
DOI
10.4028/www.scientific.net/KEM.280-283.1297
Citation
Z. Y. Chu, H. F. Cheng, J. Wang, Y. C. Song, Y. D. Wang, C.X. Feng, "Formation Mechanism of Interior Microflaws in the Preparation of Polymer-Derived Silicon Carbide Fibers", Key Engineering Materials, Vols. 280-283, pp. 1297-1300, 2005
Online since
February 2007
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Price
$32.00
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