Simultaneous pulsed current activated combustion synthesis and densification of NbSi2-SiC composite

作者：Shon In Jin^*; Park Hyun Kuk; Kim Hwan Cheol; Yoon Jin Kook; Ko In Yong

来源：Ceramics International, 2008, 34(3): 615-619.

DOI：10.1016/j.ceramint.2006.12.012

• sintering
• mechanical properties
• pulsed current activated combustion
• composite materials
• intermetallic
• nanophase
• NbSi2-SiC

Dense ultrafine NbSi2-SiC composite was synthesized by the pulsed current activated combustion synthesis (PCACS) method within 3 min in one step from mechanically activated powders of NbC and 3Si. Simultaneous combustion synthesis and densification were accomplished under the combined effects of a pulsed current and mechanical pressure. Highly dense NbSi2-SiC Composite with relative density of up to 97% was produced under simultaneous application of a 60 Mpa pressure and the electric current. The average grain size and mechanical properties (hardness and fracture toughness) of the composite were investigated.

• 出版日期2008-4