Characteristics of a continuous Si-Ti-C-O fibre with low oxygen content using an organometallic polymer precursor
✍ Scribed by Masaki Shibuya; Takemi Yamamura
- Publisher
- Springer
- Year
- 1996
- Tongue
- English
- Weight
- 465 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0022-2461
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✦ Synopsis
A continuous Si-Ti-C-O fibre with 12 wt% oxygen content, which is lower than the usual 18 wt% found in the normal fibres, was synthesized by using polytitanocarbosilane which has fewer Si-Si bonds than the usual precursor polymer. The density, tensile strength, tensile modulus and thermal conductivity were found to be 2.37 gcm-3, 3.4_+ 0.3 GPa, 190 _+ 10 GPa and 1.40 W m-1 K-l, respectively. Amongst these properties, the tensile modulus was improved by 20 GPa and the thermal conductivity had a higher value in comparison with that of the ordinary Si-Ti-C-O fibre with 18 wt% oxygen content. The Si-Ti-C-O fibre with a 12 wt% oxygen content has a better heat resistance above 1400 ~ in an argon atmosphere and 1300~ air, than the usual fibre. About 60 and 40% of its tensile strength at room temperature were retained in air at respectively, 1500 and 1600~ This improved ceramic fibre is considered to be useful as a reinforcing material for advanced composites such as high-temperature ceramic matrix composites and metal matrix composites.