采用机械合金化和放电等离子烧结(SPS)技术制备了纳米TiC颗粒弥散增强超细晶W-TiC复合材料,对超细晶W-TiC复合材料的显微组织和室温力学性能进行了研究.研究表明,采用SPS工艺于1700℃下烧结1 min可获得烧结颗粒结合良好,致密度高达约98.6％的超细晶W-TiC复合材料.通过添加纳米TiC,不仅能抑制W晶粒的长大,还能促进W的致密化.当TiC的加入量为0.7％时(质量分数,下同)可获得晶粒尺寸为0.5 μm,抗弯强度和维氏硬度分别为1262MPa,6.45 GPa的超细晶W-TiC复合材料.
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