Combustion synthesis of TiCxN1−x–TiB2 ceramic composites in a high-gravity field

TiCxN1−x–TiB2 ceramic composites were prepared by combustion synthesis in a high-gravity field in air. The high-gravity field caused no change in phase composition but resulted in reduced delamination and grain refinement in the microstructure of the products. In a high-gravity field of 100g, well-developed faceted grains with a narrow size distribution were obtained. It is proposed that the combustion reaction happened by a pulsating combustion mode and the pulsating period was prolonged by the high-gravity field.

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► Ceramic composites are prepared by combustion synthesis under high-gravity field.
► Well-developed faceted grains with a narrow size distribution are obtained.
► The combustion reaction occurs by a pulsating combustion mode.
► The high-gravity field prolongs the pulsating period.