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运用电场激活压力辅助合成(FAPAS)和原位合成技术制备了(TiC)pNi/TiAl/Ti功能梯度材料,研究了电场对材料合成及层界面扩散连接的作用。采用光学显微镜、扫描电子显微镜、能谱和X射线衍射仪分析了梯度材料各层及界面微观组织、相组成和元素分布。结果表明,电场的施加以及TiAl的燃烧反应是合成材料的关键;经原位合成的TiC颗粒均匀细小;金属陶瓷层/TiAl/Ti基板的界面区产生了成分的互扩散并形成了良好的冶金结合。钛板到金属陶瓷层的显微硬度呈梯度变化且具有较好的抗热震性。
(TiC) pNi / TiAl / Ti functional graded materials were prepared by electric field activated pressure assisted synthesis (FAPAS) and in-situ synthesis, and the effect of electric field on the material synthesis and interface diffusion bonding was investigated. The microstructure, phase composition and elemental distribution of each layer and interface of gradient material were analyzed by optical microscope, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The results show that the application of electric field and the combustion reaction of TiAl are the key points of the composites. The in-situ synthesized TiC particles are uniform and fine. The intermetallic layer of the cermet layer / TiAl / Ti substrate produces interdiffusion of the components and forms a good metallurgy Combined. Titanium plate to the metal ceramic layer hardness gradient gradient and has good thermal shock resistance.