Fabrication of TiC-20 mass%Ni Cermet Using MA-PCS Process

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  • Kobayashi Keizo
    Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology
  • Ozaki Kimihiro
    Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology

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  • Fabrication of TiC 20massパーセントNi Cermet Using MA PCS Process

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Abstract

Mechanical alloying and pulsed-current sintering were used to synthesize TiC-20 mass%Ni cermet with ultra-fine TiC particles dispersed. The mixture, in which Ti and Ni elements were uniformly distributed, was prepared by mechanical alloying of Ti, Ni and graphite powders for 18 ks. TiC particles were produced in the mixture milled for longer than 18 ks through a combustion synthesis reaction during heating. Mechanically alloyed Ti-C-Ni composite powder milled for 18 ks was consolidated using pulsed-current sintering at 1223 K under 70 MPa pressure. The sintered compact consisted of TiC and Ni. The average grain size of TiC particles in the sintered body was 0.80 μm. The relative density of the sintered compact reached 92% of the theoretical one; its Vickers hardness was 2260 Hv.

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 47 (10), 2561-2565, 2006

    The Japan Institute of Metals and Materials

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