非晶态FeCoSiB,FeSiB和FeB的微观结构X射线衍射分析

用X射线衍射方法分析非晶态合金Fe₅Co₇₀Si₁₅B₁₀,Fe₇₈Si_1OB₁₂和Fe₈₀B₂₀的结构,由测得的衍射强度数据计算了这些合金的结构因子和径向分布函数(RDF)。为得到二元非晶合金Fe₈₀B₂₀的部分径向分布函数(PRDF),用两个高斯型函数之和弥合Fe 关键词：

X-RAY STRUCTURE ANALYSIS OF AMORPHOUS ALLOYS FeCoSiB, FeSiB AND FeB

In this work, the structures of the amorphous alloys Fe₅Co₇₀Si₁₅B₁₀,Fe₇₈Si_1OB₁₂ and Fe₈₀B₂₀ were analysed by X-ray diffraction method. From the diffraction intensity data the structure factors and radial distribution functions (RDF) of these materials were calculated.In order to obtain partial radial distribution functions (PRDF) of the binary alloy Fe₈₀B₂₀, the first peak of the alloy was fitted using a sum of two Gauss type functions. One of them describes the PRDF of the Fe-Fe atom pair, and the other describes the PRDF of the Fe-B atom pair.As the results of fitting, the average number of nearest neighbor atoms and most probable distance between two atoms were determined for each kind of atom pair. The curves of PRDF and the values of those parameters agree satisfactorily with the results obtained by other author using anomalous X-ray diffraction technique.