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首页> 外文期刊>Journal of the Physical Society of Japan >New ternary ordered structures in CuMPt6 (M=3d elements) alloys
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New ternary ordered structures in CuMPt6 (M=3d elements) alloys

机译：CuMPt6（M = 3d元素）合金中的新三元有序结构

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摘要

X-ray and electron diffraction measurements were performed to investigate the structure and ordering behaviour of the ternary alloys CuMPt6 (M = Ti, V, Cr, Mn, Fe, Co, and Ni). X-ray polycrystalline diffraction patterns of all the specimen, quenched from 1000 degrees C have shown that a single phase is formed at this stoichiometric composition. The alloys with M = Cr, Mn, Co, and Ni have the face-centred cubic (fcc) structure, while in the alloys with M = Ti, V, and Fe ordering has occurred and the structure is of the Cu3Au type. On annealing at lower temperatures ordering has been induced in the alloys with M = Cr, Mn, and Co and the structure is of the Cu3Au type, though the ordering in the last alloy has remained incomplete. Detailed X-ray diffraction measurements on single crystals of the CuMnPt6 alloy have revealed that further ordering takes place and structure changes from the Cu3Au type into the cubic ABC(6) type with the unit cell as large 2 x 2 x 2 as the fee unit cell, a new observation of the double-step ordering in the ternary fee alloy. The corresponding transition temperatures are T-c = 970(+/- 5)degrees C and T-cl = 750(+/- 5)degrees C.
机译：进行了X射线和电子衍射测量，以研究三元合金CuMPt6（M = Ti，V，Cr，Mn，Fe，Co和Ni）的结构和有序行为。从1000℃淬火的所有样品的X射线多晶衍射图谱表明，在该化学计量组成下形成了单相。 M = Cr，Mn，Co和Ni的合金具有面心立方（fcc）结构，而M = Ti，V和Fe的合金则出现有序排列，且结构为Cu3Au型。在较低温度下进行退火时，M = Cr，Mn和Co的合金中已引起有序化，尽管最后一种合金中的有序性仍不完全，但其结构为Cu3Au型。对CuMnPt6合金单晶进行的详细X射线衍射测量表明，发生了进一步的排序，并且结构从Cu3Au型转变为立方ABC（6）型，其晶胞为2 x 2 x 2大单位作为单位单元，对三元合金中双步有序的新观察。相应的转变温度为T-c = 970（+/- 5）摄氏度和T-cl = 750（+/- 5）摄氏度。

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