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
收藏
页码：335 / 342
页数：8
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