Preparation and mechanical properties of titanium matrix composite materials by spark plasma sintering
Discharge plasma sintering method was used to prepare(TiC+TiB)/TC4 composite material,and the effect of sintering temperature on the phase composition,microstructure,and mechanical properties of titanium based composite materials were studied.5vol.％(TiC+TiB)/TC4 composite was prepared by in-situ synthesis u-sing SPS at temperatures ranging from 1 000 to 1 150 ℃.TiCp and TiBw exhibit a quasi continuous network struc-ture distributed at grain boundaries.As the SPS temperature increases,the strength and engineering strain of the composite material first increase and then decrease,reaching a maximum of 1 722 MPa and 28.31％at 1 100 ℃,thus determining the optimal SPS temperature.After the generation of reinforcement phase,the strength of the composite material is improved,mainly due to the load-bearing strengthening,solid solution strengthening,disloca-tion strengthening,and fine grain strengthening of the reinforcement phase.
titanium based composite materialsSPSsintering temperaturemicrostructuremechanical property
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