Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10626009 | Ceramics International | 2013 | 7 Pages |
Abstract
A new method to weaken the interfacial bonding and increase the strength of 3D mullite fiber reinforced mullite matrix (Muf/Mu) composites is proposed and tested in this paper. Firstly, Muf/Mu composites were fabricated through sol-gel process with varied sintering temperature. Then, the effects of sintering temperature on mechanical properties of the composites were tested. As sintering temperature was raised from 1000 °C to 1300 °C, the three-point flexural strength of the composites firstly decreased from 66.17 MPa to 41.83 MPa, and then increased to 63.17 MPa. In order to explain the relationship between composite strength and sintering temperature, morphology and structure of the mullite fibers and mullite matrix after the same heat-treatment as in the fabrication conditions of the composites were also investigated. Finally, it is concluded that this strength variation results from the combined effects of matrix densification, interfacial bonding and fiber degradation under different sintering temperatures.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yi Wang, Haifeng Cheng, Haitao Liu, Jun Wang,