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Effects of volume fraction of short-cut quartz fibers on mechanical and thermal properties of SiO2f/SiO2 composites.
- Source :
-
Journal of the Australian Ceramic Society . Jul2024, Vol. 60 Issue 3, p689-699. 11p. - Publication Year :
- 2024
-
Abstract
- SiO2f/SiO2 composites were prepared by compression molding and sintering using short-cut quartz fibers as reinforcement. The effects of fiber volume fraction (15%∼35%) on bulk density, apparent porosity, and mechanical and thermal properties of the composites were investigated. The results indicated that the samples with 25% fiber volume fraction had the best comprehensive performance, with an apparent porosity and compressive strength of 36% and 46.3 MPa, respectively. The flexural strength of the samples was 13.9 MPa, which represented a 90% increase compared to the samples without fibers. It was attributed to the occurrence of fiber debonding and fiber pull-out in the porous matrix. Meanwhile, the residual strength ratio of the samples after 20 thermal shocks was 74.8%. In addition, the average coefficient of thermal expansion was 0.95 × 10− 6/℃ at 300 ℃∼700 ℃ and the thermal conductivity was 0.388 W·m− 1·K− 1 at 800 °C. This approach can satisfy the requirements of low cost, fast preparation of SiO2f/SiO2 composites, which offers the prospect of its application in the integration of load-bearing and thermal insulation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 25101560
- Volume :
- 60
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of the Australian Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 178484295
- Full Text :
- https://doi.org/10.1007/s41779-024-01034-6