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Pulsed current activated combustion synthesis and consolidation of ultrafine NbSi2 from mechanically activated powders

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Dense ultrafine NbSi2 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 NbSi2 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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Correspondence to In-Jin Shon.

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Ko, IY., Kim, BR., Nam, KS. et al. Pulsed current activated combustion synthesis and consolidation of ultrafine NbSi2 from mechanically activated powders. Met. Mater. Int. 15, 399–403 (2009).

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