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

• Published in: Metals and materials international Vol. 15; no. 3; pp. 399 - 403
• Main Authors: Ko, In-Yong, Kim, Byung-Ryang, Nam, Kee-Seok, Moon, Byung-Moon, Lee, Byung-Soo, Shon, In-Jin
• Format: Journal Article
• Language: English
• Published: Springer The Korean Institute of Metals and Materials 01.06.2009; Springer Nature B.V; 대한금속·재료학회
• Subjects: Alloys; Characterization and Evaluation of Materials; Chemistry and Materials Science; Engineering Thermodynamics; Grain size; Heat and Mass Transfer; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metallic Materials; Metallurgy; Processes; Solid Mechanics; 재료공학; pulsed current activated combustion; intermetallic; nanophase; sintering; mechanical properties; NbSi
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-009-0399-7

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.