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| Main Authors: | , , , , , , |
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| Format: | Recurso digital |
| Language: | |
| Published: |
Zenodo
1999
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| Online Access: | https://doi.org/10.5281/zenodo.15419297 |
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Table of Contents:
- The present work investigates the tensile creep behavior (deformation and rupture) at 1100-1300 oC in air of a 3-D woven Si-Ti-C-O (Tyranno(tm)) fiber/SiC-based matrix composite with and without glass sealant. The composite contained Si-Ti-C-O fibers with an additional surface modification in order to improve interface properties. Although a significant decrease in tensile strength was observed in the unsealed composite beyond 1000oC in air (and attributed to oxidation of the fiber/matrix interface), the composite with glass sealant possessed excellent mechanical properties for short-term (<1hr.) exposure in air. In this study, tensile creep testing was conducted at 1100-1300 oC in air and the effect of glass sealant on medium- and long-term strength was investigated. In addition, chemical stability of the glass sealant was evaluated by X-ray diffraction analysis. The creep rupture behavior of the composite with glass sealant under long-term exposure is suggested to depend on several factors including decomposition, evaporation, and crystallization of the glass sealant material, in addition to the applied stress.