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采用自制旋转摩擦挤压合金化设备以纯铝板和纯Ti粉为原材料制备了Al-Ti金属间化合物。利用扫描电子显微镜、能谱仪、透射电子显微镜以及X射线衍射仪对合金化产物的微观组织结构及相组成进行了分析,并对其显微硬度进行了测量。结果表明:原材料Al、Ti在摩擦棒的剪切与强烈挤压力的共同作用下,能够在固态下发生合金化反应,生成Al3Ti金属间化合物相,其晶粒尺寸约为500nm,且基体铝中的位错较多,呈卷曲无规则排列状态。合金化产物平均硬度值HV达到1080MPa,为原始纯铝硬度的4倍。
Al-Ti intermetallic compounds were prepared by using self-made rotational friction extrusion alloyed equipment with pure aluminum plate and pure Ti powder as raw materials. The microstructure and phase composition of alloying products were analyzed by scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy and X-ray diffraction. The microhardness was measured. The results show that the Al3Ti intermetallic compound phase can be formed in the solid state under the combined action of shearing force and strong pressure of the friction rod. The grain size of Al3Ti is about 500nm, More dislocations in the curly irregular arrangement of the state. The average hardness of alloyed product HV reaches 1080MPa, which is 4 times of the original pure aluminum hardness.