Consolidation and mechanical properties of nanostructured 2MoSi_2-SiC composite synthesized by high-frequency induction heated combustion

摘要

Dense nanostructured 2MoSi_2-SiC composite was synthesized by high-frequency induction heated combustion synthesis (HFIHCS) method within 1 min in one step from powders of Mo_2C and 5Si. Simultaneous combustion synthesis and densification were accomplished under the combined effects of an induced current and mechanical pressure. Highly dense 2MoSi_2-SiC with relative density of up to 96.5% was produced under simultaneous application of a 60 MPa pressure and the induced current. The average grain size of MoSi_2 and SiC were about 50 and 40 nm, respectively. The hardness and fracture toughness values obtained were 1540kg/mm~2 and 4.6MPam~(1/2), respectively.