SAXS AND TEM STUDY OF THE KINETICS OF PHASE-SEPARATION IN AL-ZN

被引：28

作者：

FOROUHI, AR ^{[1
]}

DEFONTAINE, D ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY, DEPT MAT SCI & MINERAL ENGN, BERKELEY, CA 94720 USA

来源：

ACTA METALLURGICA | 1987年 / 35卷 / 07期

关键词：

ALUMINUM METALLOGRAPHY - Microstructures - CHEMICAL REACTIONS - Reaction Kinetics - HEAT TREATMENT - Annealing - MICROSCOPIC EXAMINATION - Transmission Electron Microscopy;

D O I：

10.1016/0001-6160(87)90132-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Kinetics of phase separation and coarsening in Al-22 at. % Zn-0. 1 at. % Mg from early to late annealing times has been studied by correlating the time evolution of the small-angle X-ray scattering spectrum and microstructure as revealed by transmission electron microscopy. Three kinetic regimes were recognized. The dominant coarsening mechanisms are interpreted as arising from cluster coagulation at early times and single atom diffusion at late times. The intensity spectra from different times could be made to coincide on one curve through appropriate scaling provided the microstructure was not changing during that time period. Simple analytical forms describe the shape of the scaled intensity curves.

引用

页码：1863 / 1878

页数：16

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