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Title: The Effects of Interfaces on Radiation Damage Production in Layered Metal Composites

Abstract

Molecular dynamics computer simulations of 5 keV displacement cascades near cube-on-cube Cu-Ni interfaces have been performed. Both coherent interfaces (with large coherency stresses) and semi-coherent interfaces (with misfit dislocations in the interface) typical of nanolayer metal composites are considered. The primary damage state of cascades from 5 keV recoil atoms in the composite differs from that in cascades generated in pure Cu and Ni. In the semi-coherent case some defect clusters form directly on the misfit dislocations. Excluding these, the defect yields for both interface types are about two-thirds of the average yield of defects for cascades in the pure metals. In single cascades, as well as for overlapping multiple cascades, the numbers of surviving defects in the semi-coherent interface are significantly different in the Cu and Ni layers, but they are the same in Cu and Ni for the coherent case. Anti-site atomic mixing occurs near both types of interfaces, more so in the coherent case.

Authors:
; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
860038
Report Number(s):
PNNL-SA-41654
Journal ID: ISSN 0022-3115; JNUMAM; AT6020100; TRN: US0504865
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 329-333; Journal Issue: Pt. A; Journal ID: ISSN 0022-3115
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER; NICKEL; COMPOSITE MATERIALS; MOLECULAR DYNAMICS METHOD; ATOMIC DISPLACEMENTS; INTERFACES; RECOILS; COMPUTERIZED SIMULATION; DISLOCATIONS; C0900 Composite Materials; C1000 Copper, Copper Alloys and Compounds; I0200 Interfaces; R0100 Radiation Effects: Atomic Defects; T0100 Theory and Modeling; FCC

Citation Formats

Heinisch, Howard L, Gao, Fei, and Kurtz, Richard J. The Effects of Interfaces on Radiation Damage Production in Layered Metal Composites. United States: N. p., 2004. Web. doi:10.1016/j.jnucmat.2004.04.142.
Heinisch, Howard L, Gao, Fei, & Kurtz, Richard J. The Effects of Interfaces on Radiation Damage Production in Layered Metal Composites. United States. https://doi.org/10.1016/j.jnucmat.2004.04.142
Heinisch, Howard L, Gao, Fei, and Kurtz, Richard J. 2004. "The Effects of Interfaces on Radiation Damage Production in Layered Metal Composites". United States. https://doi.org/10.1016/j.jnucmat.2004.04.142.
@article{osti_860038,
title = {The Effects of Interfaces on Radiation Damage Production in Layered Metal Composites},
author = {Heinisch, Howard L and Gao, Fei and Kurtz, Richard J},
abstractNote = {Molecular dynamics computer simulations of 5 keV displacement cascades near cube-on-cube Cu-Ni interfaces have been performed. Both coherent interfaces (with large coherency stresses) and semi-coherent interfaces (with misfit dislocations in the interface) typical of nanolayer metal composites are considered. The primary damage state of cascades from 5 keV recoil atoms in the composite differs from that in cascades generated in pure Cu and Ni. In the semi-coherent case some defect clusters form directly on the misfit dislocations. Excluding these, the defect yields for both interface types are about two-thirds of the average yield of defects for cascades in the pure metals. In single cascades, as well as for overlapping multiple cascades, the numbers of surviving defects in the semi-coherent interface are significantly different in the Cu and Ni layers, but they are the same in Cu and Ni for the coherent case. Anti-site atomic mixing occurs near both types of interfaces, more so in the coherent case.},
doi = {10.1016/j.jnucmat.2004.04.142},
url = {https://www.osti.gov/biblio/860038}, journal = {Journal of Nuclear Materials},
issn = {0022-3115},
number = Pt. A,
volume = 329-333,
place = {United States},
year = {2004},
month = {8}
}