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Title: Irradiation-Induced Nanostructures

Abstract

This paper summarizes the results of the studies of 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 which have suffered irradiation from the decay of constituent radioactive elements and in nuclear reactor fuels which 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.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
9713
Report Number(s):
SAND99-2077J
TRN: AH200125%%146
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Materials Science and Engineering A
Additional Journal Information:
Other Information: Submitted to Materials Science and Engineering A; PBD: 9 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; CRYSTAL STRUCTURE; ELECTRONS; FISSION NEUTRONS; FISSION PRODUCTS; INTERMETALLIC COMPOUNDS; IRRADIATION; MONOCRYSTALS; RECRYSTALLIZATION; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Birtcher, R.C., Ewing, R.C., Matzke, Hj., Meldrum, A., Newcomer, P.P., Wang, L.M., Wang, S.X., and Weber, W.J. Irradiation-Induced Nanostructures. United States: N. p., 1999. Web.
Birtcher, R.C., Ewing, R.C., Matzke, Hj., Meldrum, A., Newcomer, P.P., Wang, L.M., Wang, S.X., & Weber, W.J. Irradiation-Induced Nanostructures. United States.
Birtcher, R.C., Ewing, R.C., Matzke, Hj., Meldrum, A., Newcomer, P.P., Wang, L.M., Wang, S.X., and Weber, W.J. Mon . "Irradiation-Induced Nanostructures". United States. https://www.osti.gov/servlets/purl/9713.
@article{osti_9713,
title = {Irradiation-Induced Nanostructures},
author = {Birtcher, R.C. and Ewing, R.C. and Matzke, Hj. and Meldrum, A. and Newcomer, P.P. and Wang, L.M. and Wang, S.X. and Weber, W.J.},
abstractNote = {This paper summarizes the results of the studies of 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 which have suffered irradiation from the decay of constituent radioactive elements and in nuclear reactor fuels which 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.},
doi = {},
journal = {Materials Science and Engineering A},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}