Articles
  • Properties and rapid consolidation of (W,Ti)C-CNT by pulsed current activated sintering
  • Seung-Jin Oha, Byung-Su Kimb Jin-Kook Yoonc and In-Jin Shona,*
  • a Division of Advanced Materials Engineering and the Research Center of Advanced Materials Development, Engineering College, Chonbuk National University, 561-756, Korea b Minerals Resources Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Korea c Materials Architecturing Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea
Abstract
The grain size of (W,Ti)C powder remarkably decreases with a high-energy ball milling. The rapid sintering of nanostuctured (W,Ti)C and (W,Ti)C-CNT hard materials was investigated with pulsed current activated sintering. The advantage of this process is that it allows very quick densification to near theoretical density and prohibition of grain growth in nanostuctured materials. A dense nanostructured (W,Ti)C and (W,Ti)C-CNT hard material with a relative density of up to 99% was produced with simultaneous application of 80 MPa pressure and a pulsed current of 2000A within 3 minutes. The effect of CNT on the sintering behavior and mechanical properties of (W,Ti)C was investigated.

Keywords: Nanomaterials, Sintering, Hardness, Fracture Toughness, Hard Materials

This Article

  • 2016; 17(3): 156-160

    Published on Mar 31, 2016

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