A STUDY OF COPPER DISTRIBUTION IN LAMELLAR AL-CUAL2 EUTECTICS USING AN ENERGY ANALYSING ELECTRON MICROSCOPE

被引：35

作者：

SPALDING, DR

机构：

[1] Metal Physics Group, Cavendish Laboratory, Cambridge

[2] Metallurgy Department, University of Cambridge

[3] W. M. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, CA

来源：

PHILOSOPHICAL MAGAZINE | 1969年 / 20卷 / 165期

关键词：

D O I：

10.1080/14786436908228720

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Plasmon energy loss measurements are used to investigate the copper distribution in the lamellar Al–CuAl2 eutectic. The results for aged, decanted and splat-quenched crystals show that there is considerably less copper present in the Al-rich lamellar phase than predicted by eutectic growth theories. This discrepancy is explained in terms of a post-solidification precipitation of the copper epitaxially on to the CuAl2, lamellae. The aged crystals show a higher copper solute concentration in bands ∼ 1000 Å wide parallel with the interphase boundaries. These copper concentration gradients are tentatively interpreted as being due to the non-stoichiometry of the equilibrium CuAl2, phase. Observations of surface plasmon losses at the interface between the lamellar phases are also reported. © 1969 Taylor & Francis Group, LLC.

引用

页码：471 / &

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