Fabrication of TiC-Based Composites by SHS/Dynamic Pseudo Isostatic Compaction.

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  • Ohyanagi Manshi
    Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University
  • Sugahara Setsu
    Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University
  • Koizumi Mitsue
    Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University

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  • Fabrication of TiC-Based Composites by

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TiC-based composites were fabricated by dynamic pseudo isostatic compaction (DPIC) just after self-propagating high temperature synthesis (SHS). The pressing of 20-255MPa (velocity of piston: 60mm/sec) was performed through a sand medium. The process enables to simultaneously synthesize and density the TiC/Ti, TiC/Ti (Mo) composites from Ti, C, Mo powders. The sample could be taken out from a reaction vessel within a couple of minutes after ignition. The adiabatic combustion temperatures were also calculated as a function of the mixing ratio of the elemental powders in the reaction system. X-ray diffraction patterns of TiC/Ti and TiC/Ti (Mo) produced revealed that the portion of Ti consisted of α-Ti and β-Ti (Mo) respectively. The time delay between SHS and DPIC was affected greatly on the product density. Micro Vickers hardness, Young's modulus and bending strength of the composites were measured. In case of TiC/Ti, the values were 550[Hv], 230MPa, 1130MPa in the ratio of C/Ti=0. 3, respectively, and the density was 4. 54 g/cm3. In TiC/Ti (Mo) composite with 4. 92 g/cm3 of the density, the values were 610[Hv], 200MPa, 1050MPa in the ratio of C/Ti (Mo) =0. 3 and Mo/ (Ti, Mo) =0. 1, respectively. The wear resistance of TiC/Ti (Mo) composite was 2 times higher than TiC/Ti material.

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