In situ fabrication of TiC/Ti3Al/Ti2AlC composite by spark plasma sintering technology

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  • JIANG Wan
    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University Engineering Research Center of Advanced Glasses Manufacturing Technology, MOE, Donghua University State key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
  • SHI Lu
    State key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
  • WANG Lianjun
    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University Engineering Research Center of Advanced Glasses Manufacturing Technology, MOE, Donghua University
  • ZHANG Jianfeng
    Institute for Materials Research, Tohoku University

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A powder mixture of Ti, Al4C3 and graphite was adopted to synthesize a new TiC/Ti3Al/Ti2AlC composite by spark plasma sintering. The reaction route was proposed from XRD analysis. TiC, Ti3Al and Ti2AlC formed from 800°C with TiCx and Ti3Aly acting as the intermediate phases until the reaction process completed at 1200°C. It was found from TEM observation that Ti3Al underwent an intergrowth relationship with TiC grains inside the Ti2AlC matrix due to the in situ reaction sintering. The average hardness, fracture toughness, Young’s modulus and bending strength of the composite were 10.2 ± 0.6 GPa, 6.5 ± 0.2 MPa·m1/2, 436 ± 11 MPa and 227 ± 13 GPa, respectively.

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