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The Si3N4-BN composites were prepared by gel-casting and precursor infiltration and pyrolysis route using borazine as the precursor. The composition, mechanical, microstructural, and dielectric properties of the composites were investigated. The composites are composed of h-BN, α-Si3N4, and β-Si3N4. The typical density, porosity, flexural strength, elastic modulus, and fracture toughness of the composites...
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