论文部分内容阅读
利用θ－θ液态金属Ｘ射线衍射仪研究纯Ｆｅ的液态结构，获得了衍射强度、结构因子、双体分布函数以及配位数和原子间距离．研究结果表明，在液态纯铁的结构因子曲线上也存在着预峰（ｐｒｅ－ｐｅａｋ）．预峰的出现是熔体中存在中程序的标志．根据预峰的特性，提出了液态纯Ｆｅ结构的原子模型，即共享顶点体心立方结构与无规密堆积原子分布的加和．
The liquid structure of pure Fe was studied by θ-θ liquid metal X-ray diffractometer. The diffraction intensity, structure factor, bilayer distribution function, coordination number and inter-atomic distance were obtained. The results show that there is also a pre-peak on the structural factor curve of liquid pure iron. The appearance of pre-peaks is a hallmark of the process in existence in the melt. According to the characteristics of pre-peak, an atomic model of liquid pure Fe structure is proposed, that is, the sum of body-centered cubic structures of shared vertices and random close-packed atomic distributions.