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Rapid consolidation of nanocrystalline NbSi2-Si3N4 composites by pulsed current activated combustion synthesis

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Abstract

A dense nanostructured 4NbSi2-Si3N4 composite was synthesized by a Pulsed Current Activated Combustion Synthesis (PCACS) method within 3 minutes in one step from mechanically activated powders of NbN and Si. Simultaneous combustion synthesis and densification were accomplished under the combined effects of a pulsed current and mechanical pressure. A highly dense 4NbSi2-Si3N4 composite with a relative density of up to 98 % was produced under simultaneous application of a 60 MPa pressure and the pulsed current. The average hardness and fracture toughness values obtained were 700 kg/mm2 and 3.5 MPa·m1/2, respectively

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Authors and Affiliations

  1. Division of Advanced Materials Engineering and the Research Center of Advanced Materials Development, Engineering College, Chonbuk National University, 664-14 Deokjin-dong 1-ga, Deokjin-gu, Jeonju-si, Jeonbuk, 561-756, Korea

    In-Yong Ko, Jeong-Hwan Park & In-Jin Shon

  2. Department of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University, Jeonbuk, 561-756, Korea

    Jeong-Hwan Park & In-Jin Shon

  3. Korea Institute of Materials Science, 531 Changwondaero, Changwon-si, Gyeongnam, 641-831, Korea

    Kee-Seok Nam

Authors
  1. In-Yong Ko
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  2. Jeong-Hwan Park
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  3. Kee-Seok Nam
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  4. In-Jin Shon
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Correspondence to In-Jin Shon.

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Ko, IY., Park, JH., Nam, KS. et al. Rapid consolidation of nanocrystalline NbSi2-Si3N4 composites by pulsed current activated combustion synthesis. Met. Mater. Int. 16, 393–398 (2010). https://doi.org/10.1007/s12540-010-0608-4

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  • DOI: https://doi.org/10.1007/s12540-010-0608-4

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