Metals and materials international

The Korean Institute of Metals and Materials (대한금속재료학회)
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Pulsed Current Activated Combustion Synthesis and Consolidation of Ultrafine $NbSi_2$ from Mechanically Activated Powders

Ko, In-Yong;Kim, Byung-Ryang;Nam, Kee-Seok;Moon, Byung-Moon;Lee, Byung-Soo;Shon, In-Jin

  • Published : 20090600
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Abstract

Dense ultrafine $NbSi_2$ was synthesized using the pulsed current activated combustion synthesis (PCACS) method within 2 min and in one step from mechanically activated powders of Nb and 2Si. Simultaneous combustion synthesis and densification were accomplished under the combined effects of a pulsed current and mechanical pressure. Highly dense $NbSi_2$ with a relative density of up to 98% was produced under simultaneous application of a 60 MPa pressure and a pulsed current. The average grain size and mechanical properties (hardness and fracture toughness) of the compound were investigated.

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