Abstract
Ceramic composite powders with novel composition were synthesized in situ by the combination of two different reactions in one step. The high exothermicity of a reaction previously investigated for the synthesis of TiC–TiB 2 powders was exploited to carry a second low exothermic reaction for the production of hBN–SiC composites in a self-propagation regime. The overall reaction exhibited sufficient exothermicity to self-sustain till completion. The process yielded high purity powders with tailored compositions suitable for the fabrication of ceramic and cermet materials characterized by wear resistance and self-lubricant behaviour shown by the presence of hBN intimately dispersed into the hard ceramic matrix.
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