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Mechanical properties and oxidation resistivity of carbon fiber/ceramic composites prepared from borosiloxane

Published online by Cambridge University Press:  31 January 2011

Shinsuke Hoshii ,
Akira Kojima  and
Sugio Otani
Shinsuke Hoshii
Affiliation:
Gunma College of Technology, Maebashi-shi 371, Japan
Akira Kojima
Affiliation:
Gunma College of Technology, Maebashi-shi 371, Japan
Sugio Otani
Affiliation:
School of High-Technology for Human Welfare, Tokai University, Numazu-shi 410-03, Japan
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Abstract

Diphenylborosiloxane (PBS), an organometallic compound with Si–O–B bonds, was compounded with carbon fiber (CF) to form CF/ceramic composite. Three types of PBS with different molar ratios (Si/B) in the materials were used. On the PBS obtained, specific gravity, Si content, molecular weight, melting point, and infrared absorption spectrum were measured. On the basis of these results, structures of PBS were examined, which clarified that the PBS thus synthesized consisted of several components with different molecular weights. Mechanical properties and oxidation resistivity of the CF/ceramic composites obtained differed with the Si/B ratios of PBS. Mechanical strength of the CF/ceramic composites increased with increase of Si content of PBS. It was also found that, when PBS with high boron content was used, compact vitreous film consisting mainly of B2O3 was formed over the composite. Due to the formation of this film, oxidation resistivity of the composite was improved.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 10 , October 1996 , pp. 2536 - 2540
Copyright
Copyright © Materials Research Society 1996

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References

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