采用自悬浮定向流法制备出Ag2Al复合金属间化合物的纳米微粉, 通过透射电子显微镜、X射线衍射仪和X射线能谱仪对纳米微粉的显微结构、粒度、相组成和成分构成进行研究。结果表明：所制备出的复合金属间化合物纳米颗粒呈规则球形, 粒径分布在20～110 nm之间；纳米合金颗粒的主要组成相为Ag2Al, 并伴有少量的Al；样品中的Ag, Al原子数比约为66.5∶33.5, 金属间化合物纳米颗粒中Ag2Al晶粒尺寸约为33 nm, Al的约为21 nm。

Ag2Al intermetallic compound nanoparticles were synthesized by the flow-levitation method. The morphologies, granularity and phase structure were investigated by transmission electron microscope, X-ray diffractometer, and energy dispersive spectrometer. The results indicate that the prepared nanoparticles are regular spheres, with the grain size ranging from 20 to 110 nm. The nanoparticles are mainly composed of Ag2Al, including a little Al. The data of chemistry elementary analysis indicate that the atomic ratio of Ag to Al in the nanoparticles is about 66.5∶33.5. The grain size of Ag2Al in the prepared nanoparticles is about 33 nm, and that of Al is about 21 nm.