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Pulsed current activated combustion synthesis and consolidation of ultrafine NbSi2 from mechanically activated powders |
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| Authors: | In-Yong Ko Byung-Ryang Kim Kee-Seok Nam Byung-Moon Moon Byung-Soo Lee In-Jin Shon |
| Affiliation: | (1) Division of Advanced Materials Engineering, Research Center of Industrial Technology, Chonbuk National University, 664-14 Deokjin-dong 1-ga, Deokjin-gu, Jeonju, Jeonbuk, 561-756, Republic of Korea;(2) Advanced Functional Materials Research Center, Korea Institute of Science and Technology, P.O Box 131, Cheongryang, Seoul, 130-650, Republic of Korea; |
| Abstract: | 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. |
| Keywords: | pulsed current activated combustion intermetallic sintering nanophase mechanical properties NbSi2 |
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