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首页> 外文期刊>Philosophical Magazine Letters >Effect of ternary addition on the formation of Cu_3Pt and CuPt order phases in the Cu-Pt system
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Effect of ternary addition on the formation of Cu_3Pt and CuPt order phases in the Cu-Pt system

机译：三元添加对Cu-Pt体系中Cu_3Pt和CuPt有序相形成的影响

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摘要

The effect of addition of ternary elements, mainly In and Pd, on the phase fields of Cu_3Pt with the Ll_2 type of ordered structure and CuPt with an Ll_1 type of ordered structure in the Cu-Pt system has been investigated and the results compared with the substitution behaviour of the added elements and the electron-atom (e/a) ratio of the alloys. Electrical resistivity measurements and structural analysis by X-ray diffraction reveal that the addition of In leads to a shift of the phase field of the Cu_3Pt towards the higher temperature regime and the Pt-rich side, and to a shift of the phase field of the CuPt towards the lower temperature regime and the Pt-rich side in the phase diagram of the Cu-Pt system. In contrast, the addition of Pd leads to a shift of the phase fields of both Cu_3Pt and CuPt towards the lower temperature regime and the Cu-rich side. However, by plotting these phase fields on a temperature-e/a diagram, it is seen that the range of e/a ratio for each phase field is about 0.71-0.97 for the Cu_3Pt phase and about 0.25-0.71 for the CuPt phase irrespective to the kind and amount of the added element.
机译：研究了添加三元元素（主要是In和Pd）对Cu-Pt系统中具有Ll_2型有序结构的Cu_3Pt和具有Ll_1型有序结构的CuPt的相场的影响，并将结果与添加元素的取代行为和合金的电子-原子（e / a）比。电阻率测量和X射线衍射结构分析表明，添加In会导致Cu_3Pt的相场向较高的温度范围和富Pt侧偏移，并导致Cu_3Pt的相场向较高的温度范围偏移。 Cu-Pt系统相图中的CuPt朝向较低的温度区和富Pt侧。相反，Pd的添加导致Cu_3Pt和CuPt的相场都朝着低温状态和富Cu侧移动。但是，通过在温度e / a图上绘制这些相场，可以看出，每个相场的e / a比范围对于Cu_3Pt相大约为0.71-0.97，对于CuPt相大约为0.25-0.71所添加元素的种类和数量。

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