HT-XRD in the study of Cu-Li-Mg

M. Braga, J. Ferreira, L. Malheiros, M. Hämäläinen
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引用次数: 1

Abstract

In a previous study on Cu-Li-Mg system, the authors of the present paper con- cluded that the ternary phase in that system corresponds to CuMg2-xLix (x ~ 0.11), with a hexagonal structure, space group P6222 (180), and lattice parameters a = b = 0.5260 nm, c = 1.3649 nm (1). The structure was refined by the Rietveld method (2). In order to characterize the thermal behaviour of the ternary compound and to assess the Cu-Li-Mg phase diagram (3), HT-XRD measurements were performed on samples whose compositions were close to the one corresponding to the ternary compound. SEM/EDS measurements of the phases' compositions in equilibrium, as well as DSC/DTA heating curves, contributed to the identifi- cation of the transition temperatures and the phases present in equilibrium. It was concluded that the ternary phase decomposes at ~ 702 ± 2K.
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用HT-XRD研究Cu-Li-Mg
在前人对Cu-Li-Mg体系的研究中,作者得出该体系中的三元相对应于CuMg2-xLix (x ~ 0.11),具有六边形结构,空间群P6222(180),晶格参数a = b = 0.5260 nm, c = 1.3649 nm(1)。通过Rietveld方法对结构进行了细化(2)。为了表征三元化合物的热行为并评估Cu-Li-Mg相图(3),对样品的组成与三元化合物的组成接近的样品进行了HT-XRD测量。平衡相组成的SEM/EDS测量以及DSC/DTA加热曲线有助于确定过渡温度和平衡相。结果表明,三元相在~ 702±2K时发生分解。
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来源期刊
CiteScore
1.47
自引率
0.00%
发文量
0
审稿时长
3 months
期刊介绍: Zeitschrift für Kristallographie International journal for structural, physical, and chemical aspects of crystalline materials ISSN 0044-2968 Founded in 1877 by Paul Groth Zeitschrift für Kristallographie is one of the world’s oldest scientific journals. In original papers, letters and review articles it presents results of theoretical or experimental study on crystallography.
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