以Fe-Ni-Ti-Al为助烧剂,用热压的方法制备了TiB2基金属陶瓷.研究了烧结温度、烧结时间、助烧剂对材料显微结构和力学性能的影响,初步分析了TiB2基金属陶瓷的增韧机理.结果表明,随着烧结温度的提高,材料弯曲强度降低,洛氏硬度升高;随着烧结时间延长,弯曲强度出现峰值.SEM、EDS观察表明,助烧剂中的Ti避免了Fe2B、Ni23B6等脆性相的生成,Al有除氧的作用.裂纹偏转和裂纹桥联是TiB2金属陶瓷重要的增韧方式.
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