Abstract:Aimed at the comprehensive performance of wave ̄transparent materials applied in aircrafts at different
Mach numberꎬ integrating the performance of wave transmissivityꎬ load bearingꎬ thermal insulationꎬ corrosion resist ̄
anceꎬ shock resistanceꎬ research of ceramic matrix composites reinforced by continuous fibers of different temperature
range were carried on. The Al2O3 fiberꎬ mullite fiberꎬ SiO2 fiberꎬ Si3N4 fiber ̄reinforced SiBN ceramic matrix compos ̄
ites have been fabricated by the way of precursor infiltration pyrolysis(PIP) respectively. Subsequentlyꎬ the dielectric
and mechanical properties of the composites have been measured and evaluated. The mullitef ̄SiBN composite's dielec ̄
tric constant and dielectric loss are 4.1 to 4.2 and 1.0×10-2 to 9.7×10-3 respectively. The composite's bending
strengthꎬ tensile strength and compressive strength are 95.12 MPaꎬ34.95 MPa and 80.92 MPa respectively. The re ̄
sults prove that the mullitef ̄SiBN composite get the best comprehensive performance.