【摘要】 采用热压法制备了B4C/TiC/Mo陶瓷复合材料,分析了烧结工艺和TiC含量对B4C/TiC/Mo陶瓷复合材料力学性能和显微结构的影响。当烧结参数为1900℃,45min,35MPa时,85.3%(质量分数,下同)B4C/10%TiC/4.7%Mo陶瓷复合材料的抗弯强度、韧性、硬度和相对密度分别为705MPa,3.82MPa.m1/2,20.6GPa,98.2%。添加的TiC在烧结过程中与B4C发生化学反应生成了TiB2,利用生成的TiB2与添加的Mo协同增韧补强B4C/TiC/Mo陶瓷复合材料。更多还原

【Abstract】 B₄C/TiC/Mo ceramic composites were fabricated by hot pressing with TiC and Mo as toughening phases. The influence of preparing parameters and the content of TiC on microstructure and mechanical properties of the composites was analyzed. The bending strength, toughness, hardness and relative density of the composite prepared by the optimized process of 1900℃ under 35MPa for 45min were 705MPa, 3.82MPa·m 1/2 , 20.6GPa, 98.2%, respectively. B₄C/TiC/Mo ceramic composites were toughened and strengthened by the combination of Mo and TiB₂ formed by the reaction between TiC and B₄C, which was attributed to mechanical properties of the composite.更多还原