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Silicon carbide (SiC) fiber has recently received considerable attention as promising next-generation fiber because of its high strength at temperatures greater than 1300 ℃ in air. High-quality SiC fiber is primarily made through a curing and heat treatment process. In this study, the chemical vapor curing method, instead of the thermal oxidation curing method, was used to prepare cured polycarbosilane (PCS) fiber. During the high temperature heat treatment of the cured PCS fiber, varied heating rates of 10, 20, 30, and 40 ℃/min were applied. Throughout the process, the fiber remained in the amorphous silicon carbide phase, and the measured tensile strength was the greatest when the oxygen content in the heat-treated fiber was low, due to the rapid heating rate. The fiber produced through this method was also found to have excellent internal oxidation properties. This fast, continuous process shows а great promise for the production of SiC fiber and the development of high-quality products.


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Effect of heating rate on the properties of silicon carbide fiber with chemical-vapor-cured polycarbosilane fiber

Show Author's information Tae-Eon KIMKhos-Erdene KHISHIGBAYARKwang Youn CHO( )
Ceramic Fiber and Composite Materials Center, Korea Institute of Ceramic Engineering and Technology, 101, Soho-ro, Jinju-si, Gyeongsangnam-do, 660-031, R. O. Korea

Abstract

Silicon carbide (SiC) fiber has recently received considerable attention as promising next-generation fiber because of its high strength at temperatures greater than 1300 ℃ in air. High-quality SiC fiber is primarily made through a curing and heat treatment process. In this study, the chemical vapor curing method, instead of the thermal oxidation curing method, was used to prepare cured polycarbosilane (PCS) fiber. During the high temperature heat treatment of the cured PCS fiber, varied heating rates of 10, 20, 30, and 40 ℃/min were applied. Throughout the process, the fiber remained in the amorphous silicon carbide phase, and the measured tensile strength was the greatest when the oxygen content in the heat-treated fiber was low, due to the rapid heating rate. The fiber produced through this method was also found to have excellent internal oxidation properties. This fast, continuous process shows а great promise for the production of SiC fiber and the development of high-quality products.

Keywords:

polycarbosilane (PCS), silicon carbide (SiC) fiber, chemical vapor curing, rapid heating rate, high temperature tensile strength
Received: 09 September 2016 Revised: 12 February 2017 Accepted: 01 May 2017 Published: 02 March 2017 Issue date: March 2017
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Publication history

Received: 09 September 2016
Revised: 12 February 2017
Accepted: 01 May 2017
Published: 02 March 2017
Issue date: March 2017

Copyright

© The author(s) 2017

Acknowledgements

The authors are appreciative for the financial support from the Korean Ministry of Knowledge and Economy, and the “Ceramic Fiber Commercialization Center” within the Korea Institute of Ceramic Engineering and Technology.

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