摘要：为解决Al₂O₃陶瓷脆性问题,通过添加Fe₃Al对其进行增韧,在常压烧结条件下制备了Fe₃Al-Al₂O₃纳米复相陶瓷。通过X射线衍射(XRD)、扫描电镜(SEM)、电子探针和金相显微镜对其显微组织进行分析。经果表明:随着Fe₃Al含量的增加,Fe₃Al容易发生偏聚;成型压力越大,组织越均匀;烧结温度越高,Fe₃Al的分散程度就越高;保温时间适当延长,Fe₃Al分布越均匀。

关键词：工艺参数;纳米复相陶瓷;显微组织;分布

Abstract：Because of low brittleness of alumina ceramic, the intermetallic compound Fe₃Al was added in alumina to toughing. The Fe₃Al -Al₂O₃ nano-composite ceramics were prepared by pressureless sintering. The micro-structure were analyzed by X-ray diffraction(XRD), scanning electron micrograph(SEM), electronic probe microanalyzer and optical microscope. The results indicated that Fe₃Al phase distribution became more segregate with the increase of Fe₃Al content. The greater was the forming pressure, the more homogeneous was the micro-structure. The higher was sintering temperature,the higher homogeneous was Fe₃Al distribution. Fe₃Al phase distributed more uniform with suitable extent sintering time.

Keywords：process parameter; nano-composite ceramics; microstructure; distribution