Abstract
Mullite fiber‐reinforced mullite matrix (Muf/Mu) composites were fabricated via the solgel process. Prior to the solgel process, SiC coatings were deposited on the fibers by the chemical vapor deposition (CVD) process. Effects of the SiC coatings on the mechanical and dielectric properties of the composites were investigated. The results show that the composites with SiC interphases exhibit evident toughened fracture behavior, and their flexural strength is about 2.37 times that of the as‐received composites. Besides, the complex permittivity of the composites with SiC interphases at X‐band is also increased remarkably due to the existence of carbon in the SiC interphases.
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