CAJ | 학술논문

采用放电等离子烧结技术原位合成了TiB增强Ti?1.5Fe?2.25Mo复合材料，研究了烧结温度对复合材料微观组织和力学性能的影响规律。结果表明，随着烧结温度的升高，钛合金中 TiB 晶须的长细比迅速减小；然而，复合材料的相对密度及TiB的体积含量随着烧结温度的升高而不断增大。由于TiB晶须长细比的减小会导致复合材料强度的降低，而复合材料的相对密度及TiB体积含量的增大又会带来复合材料强度的增加，因此，在这两种因素的共同作用下，最终导致 TiB/Ti?1.5Fe?2.25Mo复合材料的弯曲强度随着烧结温度的升高而缓慢增大。在烧结温度为1150°C 时，TiB/Ti?1.5Fe?2.25Mo复合材料具有最大的弯曲强度1596 MPa。
채용방전등리자소결기술원위합성료TiB증강Ti?1.5Fe?2.25Mo복합재료，연구료소결온도대복합재료미관조직화역학성능적영향규률。결과표명，수착소결온도적승고，태합금중 TiB 정수적장세비신속감소；연이，복합재료적상대밀도급TiB적체적함량수착소결온도적승고이불단증대。유우TiB정수장세비적감소회도치복합재료강도적강저，이복합재료적상대밀도급TiB체적함량적증대우회대래복합재료강도적증가，인차，재저량충인소적공동작용하，최종도치 TiB/Ti?1.5Fe?2.25Mo복합재료적만곡강도수착소결온도적승고이완만증대。재소결온도위1150°C 시，TiB/Ti?1.5Fe?2.25Mo복합재료구유최대적만곡강도1596 MPa。
TiB/Ti?1.5Fe?2.25Mo composites were synthesized in situ using the spark plasma sintering (SPS) method at temperatures of 850?1150 °C. The effect of the sintering temperature on microstructure and mechanical properties of the composites was investigated. The results indicate that the aspect ratio of the in situ synthesized TiB whiskers in Ti alloy matrix decreases rapidly with an increase in sintering temperature. However, both the relative density of the sintered specimens and the volume content of TiB whiskers in composites increase with increasing sintering temperature. Thus, the bending strength of the composites synthesized using SPS process increases slowly with increasing the sintering temperature from 850 to 1150 °C. TiB/Ti?1.5Fe?2.25Mo composite synthesized at 1150 °C using SPS method exhibits the highest bending strength of 1596 MPa due to the formation of fine TiB whiskers in Ti alloy matrix and the dense microstructure of the composite.