Oral Cubic Boron Nitride Reinforced Sialon Nano-Composites by Spark Plasma Sintering


Aluminosilicate oxynitride and cubic boron nitride (cBN) composites having excellent mechanical properties andchemical stability in room temperature to high temperature applications. In the present study, cubic boron nitride (cBN)reinforcedalpha-Sialonnano-composites were preparedusing spark plasma sintering (SPS) technique. The starting powdersincluding Sialon precursors and various particles size of cBN (10, 20 and 30 wt.%) were homogeneously mixed by probesonication before sintering. The effect of SPS processing parameters on the densification and mechanical behavior of thesenano-composites were investigated. These cBN enabled in the densificationsialon composite samples were analyzed for phaseidentification by X-ray diffraction. As well as, composite samples were evaluated to find cBN to hBN transformation in theSialon matrix sintered at 1500°C. Field emission scanning electron microscopy(FESEM) used for morphology and hardnessand fracture toughnesswere measured.

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