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Characteristics of the interaction of Cu-rich precipitates with irradiation-produced defects in α-Fe

Characteristics of the interaction of Cu-rich precipitates with irradiation-produced defects in α-Fe

Arokiam, A. C., Barashev, A. V., Bacon, D. J. and Osetsky, Yu. N. (2006) Characteristics of the interaction of Cu-rich precipitates with irradiation-produced defects in α-Fe. Philosophical Magazine Letters, 85 (9). pp. 491-501. ISSN 0950–0839 (Print), 1362–3036 (Online) (doi:/10.1080/09500830500300047)

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Abstract

The interaction between copper-rich precipitates in �-iron and either vacancies or self-interstitial atoms and their clusters is studied by atomic-scale modelling.
Results are compared with predictions of elasticity theory and interpreted in terms of size misfit of precipitates and defects, and the modulus and cohesive energy differences between iron and copper. Interstitial defects are repelled by precipitates at large distance but, like vacancies, attracted at small distance.
Hence, copper precipitates in iron can be sinks for both vacancy and interstitial defects, and can act as strong recombination centres under irradiation conditions.
This leads to a tentative explanation for the mixed Cu–Fe structure of precipitates and the absence of precipitate growth under neutron irradiation conditions.
More generally, both vacancy and interstitial defects may be strongly bound to precipitates with weaker cohesion than the matrix.

Item Type: Article
Uncontrolled Keywords: characteristics, copper, Cu-rich, irradiation-produced, a-Fe,
Subjects: Q Science > QD Chemistry
T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Pre-2014 Departments: School of Engineering
School of Engineering > Department of Engineering Systems
Related URLs:
Last Modified: 14 Oct 2016 09:26
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/10972

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