Irradiation-induced nanostructures

被引：69

作者：

Wang, LM ^{[1
]}

Wang, SX

Ewing, RC

Meldrum, A

Birtcher, RC

Provencio, PN

Weber, WJ

Matzke, H

机构：

[1] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

[2] Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[4] Sandia Natl Labs, Albuquerque, NM 87185 USA

[5] Pacific NW Natl Lab, Dept Mat Sci, Richland, WA 99352 USA

[6] European Commiss Joint Res Ctr, Inst Transuranium Elements, D-76125 Karlsruhe, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 286卷 / 01期

关键词：

nanocrystalline structures; irradiation-induced; recrystallisation;

D O I：

10.1016/S0921-5093(00)00677-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper summarizes the results of our studies on the irradiation-induced formation of nanostructures, where the injected interstitials from the source of irradiation are not major components of the nanophase. This phenomena has been observed by in situ transmission electron microscopy (TEM) in a number of intermetallic compounds and ceramics during high-energy electron or ion irradiations when the ions completely penetrate through the specimen. Beginning with single crystals, electron or ion irradiation in a certain temperature range may result in nanostructures composed of amorphous domains and nanocrystals with either the original composition and crystal structure or new nanophases formed by decomposition of the target material. The phenomenon has also been observed in natural materials that have suffered irradiation from the decay of constituent radioactive elements and in nuclear reactor fuels that have been irradiated by fission neutrons and other fission products. The mechanisms involved in the process of this nanophase formation are discussed in terms of the evolution of displacement cascades, radiation-induced defect accumulation, radiation-induced segregation and phase decomposition, as well as the competition between irradiation-induced amorphization and recrystallization. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：72 / 80

页数：9

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