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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Structural study of TM60Ti40 (TM = Fe, Co, Ni) amorphous alloys produced by mechanical alloying
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Structural study of TM60Ti40 (TM = Fe, Co, Ni) amorphous alloys produced by mechanical alloying

机译：机械合金化生产的TM60Ti40（TM = Fe，Co，Ni）非晶态合金的结构研究

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This paper describes the determination of the local atomic structure of amorphous TM60Ti40 (TM = Fe, Co, Ni) alloys produced by mechanical alloying (MA) technique. The interatomic distances and the coordination numbers for the TM-TM, TM-Ti and Ti-Ti first neighbors were obtained by making the deconvolution of the first atomic shells of the radial distribution functions, which were calculated from the measured X-ray scattering patterns for the three alloys. The deconvolution was possible because the local atomic structures of these alloys can be accurately predicted by the additive hard-sphere (AHS) model. Thus, the number of TM TM and TM-Ti first neighbors given by the AHS were used in the deconvolution to find the number of minority Ti-Ti pairs. Our results show complete amorphization for the Ni60Ti40 and Co60Ti40 alloys and partial amorphization in the case of the Fe60Ti40 alloy, These results are consistent with the free enthalpies of mixing for these alloys. A chemical short-range order, greater than expected, was found in the Fe60Ti40 alloy and attributed to partial amorphization of the Fe-Ti system by MA. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 21]
机译：本文描述了通过机械合金化（MA）技术生产的非晶态TM60Ti40（TM = Fe，Co，Ni）合金的局部原子结构的确定。通过对径向分布函数的第一原子壳进行反卷积，可以得到TM-TM，TM-Ti和Ti-Ti第一邻居的原子间距离和配位数，这是根据测得的X射线散射图计算得出的用于三种合金。去卷积是可能的，因为这些合金的局部原子结构可以通过加性硬球（AHS）模型准确预测。因此，在反卷积中使用了AHS给出的TM TM和TM-Ti第一邻居的数目，以找到少数Ti-Ti对的数目。我们的结果表明，Ni60Ti40和Co60Ti40合金完全非晶化，而Fe60Ti40合金则部分非晶化。这些结果与这些合金的自由混合焓相符。在Fe60Ti40合金中发现了化学短程有序，大于预期，这归因于MA使Fe-Ti系统部分非晶化。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：21]

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