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Proceedings Paper

Preparation of a silicon carbide ceramic fiber by CO2 laser heat treatment
Author(s): Jichun Tan; Zhe Chen; Yong Su; Chunxiang Feng; Dong Cao; Dianchun Liu
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Paper Abstract

It is known that at 1200-1400 degrees C the polycarlosilane (PC) can be converted into silicon carbide (SiC) by electric furnace heating. However, the production cycle is longer than ten hours owing to the limit to the raising rate of furnace temperature. A method of laser heat-treatment for preparation of SiC fiber is presented in this paper. As soon as PC precursor is made by a fiber spinning machine, it is converted into SiC fiber of diameter about 12 micrometers under nitrogen flow. X-ray crystallogram show cubic system of (beta) -SiC was formed. The production cycle is shorter than 5 seconds, when the CO2 laser power density is about 30 W/mm2. The defect, such as bubble and hole inside the fiber, was monitored, which are formed by too large heating rate. The chemical and physical mechanism to avoid defect, together with the design of multi-beam optical setup for heating the moving fiber, is discussed.

Paper Details

Date Published: 30 September 1996
PDF: 5 pages
Proc. SPIE 2888, Laser Processing of Materials and Industrial Applications, (30 September 1996); doi: 10.1117/12.253121
Show Author Affiliations
Jichun Tan, National Univ. of Defense Technology (China)
Zhe Chen, National Univ. of Defense Technology (China)
Yong Su, National Univ. of Defense Technology (China)
Chunxiang Feng, National Univ. of Defense Technology (China)
Dong Cao, National Univ. of Defense Technology (China)
Dianchun Liu, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 2888:
Laser Processing of Materials and Industrial Applications
Shu-Sen Deng; S. C. Wang, Editor(s)

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