The microstructure of Cu-Al

被引：25

作者：

Schonfeld, B ^{[1
]}

Roelofs, H ^{[1
]}

Malik, A ^{[1
]}

Kostorz, G ^{[1
]}

Plessing, J ^{[1
]}

Neuhauser, H ^{[1
]}

机构：

[1] TECH UNIV CAROLO WILHELMINA BRAUNSCHWEIG,INST MET PHYS & NUKL FESTKORPERPHYS,D-38106 BRAUNSCHWEIG,GERMANY

来源：

ACTA MATERIALIA | 1996年 / 44卷 / 01期

关键词：

D O I：

10.1016/1359-6454(95)00164-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The short-range ordered state of thermal equilibrium for a single crystal of Cu-14.4 at.%Al aged at 483 K has been investigated at room temperature by diffuse X-ray scattering. From the short-range order scattering separated by the Georgopoulos-Cohen method, effective pair interactions V-lmn were determined. At least the first 11 V-lmn were required to reproduce the topology of the short-range order scattering. A structural analysis of modeled short-range ordered crystals as well as the values for the ground state energy of various Ll(2)-based superstructures suggest that at low temperatures the D0(23) structure is more stable for stoichiometric Cu3Al than any of the long-period Ll(2)-based superstructures observed at higher temperatures.

引用

页码：335 / 342

页数：8

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