旋转摩擦挤压合金化法制备Al3Ti金属间化合物

Al3Ti Intermetallic Compounds Fabricated by Rotational Extrusion Alloying

摘要:

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500 nm，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1080 MPa，为原始纯铝硬度的4倍。

Abstract:

The Al3Ti intermetallic compound was fabricated with pure Ti powder and aluminum plate as starting materials by self-developed rotational extrusion equipment. The microstructure of the rotational extrusion alloyed product was observed with scanning electron microscopy and energy dispersive spectrometry, the phase constituent of alloying product was inspected by transmission electron microscopy and X-ray diffraction, and the microhardness was measured. The results show that under the interaction effect of the friction stick shearing and extrusion force, the Ti-Al intermetallic compounds can be synthesized by alloying reaction, and the product is Al3Ti phase intermetallic compound. The size of Al3Ti particles is about 500 nm, and the matrix of aluminum presents a large number of dislocations, which are irregular arrangement of curly state. The average microhardness of alloyed product is 1080 MPa, four times that of matrix.