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Title: Dose dependence of Cu precipitate formation in Fe-Cu model alloys irradiated with fission neutrons

Abstract

The formation of Cu precipitates was investigated in two Fe-Cu binary model alloys irradiated at 573 K with fission neutrons at doses from 4x10{sup -4} to 6x10{sup -3} displacement per atom (dpa). Experimental positron annihilation results indicated that Cu precipitates were formed even after irradiation to 4x10{sup -4} dpa. Microvoids formed and grew at the Cu precipitates upon irradiation from 4x10{sup -4} to 3x10{sup -3} dpa. These microvoids shrank and a prominent aggregation of Cu atoms occurred upon irradiation from 3x10{sup -3} to 6x10{sup -3} dpa. The formation processes of Cu precipitates and microvoids were simulated on the basis of a rate theory. The results indicate that Cu precipitates are formed first, follow by the generation of microvoids at the Cu precipitates as Cu cluster-vacancies complexes, which agree qualitatively with the experimental results.

Authors:
; ;  [1]
  1. Research Reactor Institute, Kyoto University, Osaka 590-0494 (Japan)
Publication Date:
OSTI Identifier:
20788041
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 73; Journal Issue: 13; Other Information: DOI: 10.1103/PhysRevB.73.134115; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANNIHILATION; ATOMIC DISPLACEMENTS; ATOMS; COPPER; COPPER ALLOYS; FISSION NEUTRONS; IRON ALLOYS; IRRADIATION; POSITRONS; PRECIPITATION; SOLIDS; VACANCIES

Citation Formats

Xu, Q., Yoshiie, T., and Sato, K.. Dose dependence of Cu precipitate formation in Fe-Cu model alloys irradiated with fission neutrons. United States: N. p., 2006. Web. doi:10.1103/PHYSREVB.73.1.
Xu, Q., Yoshiie, T., & Sato, K.. Dose dependence of Cu precipitate formation in Fe-Cu model alloys irradiated with fission neutrons. United States. doi:10.1103/PHYSREVB.73.1.
Xu, Q., Yoshiie, T., and Sato, K.. Sat . "Dose dependence of Cu precipitate formation in Fe-Cu model alloys irradiated with fission neutrons". United States. doi:10.1103/PHYSREVB.73.1.
@article{osti_20788041,
title = {Dose dependence of Cu precipitate formation in Fe-Cu model alloys irradiated with fission neutrons},
author = {Xu, Q. and Yoshiie, T. and Sato, K.},
abstractNote = {The formation of Cu precipitates was investigated in two Fe-Cu binary model alloys irradiated at 573 K with fission neutrons at doses from 4x10{sup -4} to 6x10{sup -3} displacement per atom (dpa). Experimental positron annihilation results indicated that Cu precipitates were formed even after irradiation to 4x10{sup -4} dpa. Microvoids formed and grew at the Cu precipitates upon irradiation from 4x10{sup -4} to 3x10{sup -3} dpa. These microvoids shrank and a prominent aggregation of Cu atoms occurred upon irradiation from 3x10{sup -3} to 6x10{sup -3} dpa. The formation processes of Cu precipitates and microvoids were simulated on the basis of a rate theory. The results indicate that Cu precipitates are formed first, follow by the generation of microvoids at the Cu precipitates as Cu cluster-vacancies complexes, which agree qualitatively with the experimental results.},
doi = {10.1103/PHYSREVB.73.1},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 13,
volume = 73,
place = {United States},
year = {Sat Apr 01 00:00:00 EST 2006},
month = {Sat Apr 01 00:00:00 EST 2006}
}