(1. 哈尔滨工业大学 金属精密热加工国防科技重点实验室，哈尔滨 150001；
2. 山东大学(南区) 材料液态结构及其遗传性教育部重点实验室， 济南 250061)
摘 要: 为了研究液态Cu和Al的短程有序结构， 建立了液态微观结构的纳米晶粒模型。 根据这个模型，从晶体X射线衍射学的角度出发， 通过对一定晶格结构的固态Cu和Al衍射峰进行宽化处理， 计算出了它们的液态X射线衍射强度曲线。 结果表明， 这些强度曲线与实验获得的液态Cu和Al的X射线衍射强度曲线具有较好的一致性， 这不仅证明了纳米晶粒模型的正确性，同时也证明了Cu和Al的液态短程有序结构分别是FCC和BCC。
关键字: 液态金属； 微观结构； 纳米晶粒模型； 短程有序
（ 1. National Key Laboratory of Precision Hot Processing of Metals，
Harbin Institute of Technology,
Harbin 150001, China;
2. Key Laboratory of Liquid Structure and
Heredity of Materials,
Ministry of Education, Shandong University,
Ji′nan 250061, China）
Abstract: For investigating the structure of short range order(SRO) in Cu and Al melt, a nanocrystalline model for liquid metal was constructed. According to this model, the intensity curves of X-ray diffraction(XRD) of liquid Cu and Al were calculated with broadening XRD peaks of these metals in some crystal structure. The results show that these calculated intensity curves are identical with the results measured with liquid metal X-ray diffractometer on liquid Cu and Al. This fact proves that the nanocrystalline model is correct and that there is a high correlation between the SRO structures of these liquid metals and some crystalline structure, and the SRO structures of Cu and Al melt are FCC and BCC, respectively.
Key words: liquid metals; microstructure; nanocrystalline model; short range order
