Preparation and Properties of SiC Fibers Containing Yttrium and Aluminum


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SiC fibers containing Y and Al were prepared by sintering the amorphous KD-Y fibers at different temperatures from 1200 to 1800 °C. The tensile strength of fibers increases when the sintering temperature increases from 1200 to 1400 °C due to the dispersion strengthening of β-SiC microcrystal and decreases to the lowest point when being sintered at 1600 °C, then rose again with the further increase of temperature to 1800 °C. The tensile strength reached to 2.15 GPa. The oxygen content of KD-Y fibers determined the properties of the sintered SiC fibers and sintering process. Through chemical vapor curing (CVC), the oxygen content was controlled below 7.0 wt% and the tensile strength of KD-Y fibers reached to 3.08 GPa. Further-more, the sintering process of KD-Y fibers was discussed and the grain size of β-SiC grew up with the heat treatment temperature.



Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong




D. X. Yang and Y. C. Song, "Preparation and Properties of SiC Fibers Containing Yttrium and Aluminum", Key Engineering Materials, Vols. 368-372, pp. 827-830, 2008

Online since:

February 2008




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