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Title: He ion irradiation damage in Al/Nb multilayers

Abstract

We investigate the evolution of microstructure and mechanical properties of sputter-deposited Al/Nb multilayers with miscible fcc/bcc type interface and individual layer thickness, h, of 1-200 nm, subjected to helium ion irradiations: 100 keV He{sup +} ions and a fluence of 6x10{sup 16}/cm{sup 2}. Helium bubbles, 1-2 nm in diameter, are observed. When h is greater than 25 nm, hardnesses of irradiated multilayers barely change, whereas radiation hardening is more significant at smaller h. Transmission electron microscopy and scanning transmission electron microscopy studies reveal the formation of a thin layer of Nb{sub 3}Al intermetallic phase along the Al/Nb interface as a consequence of radiation induced intermixing. The dependence of radiation hardening on h is interpreted by using a composite model considering the formation of the hard Nb{sub 3}Al intermetallic layer.

Authors:
; ;  [1]; ;  [2];  [3];  [4]
  1. Department of Mechanical Engineering and Materials Science and Engineering Program, Texas A and M University, College Station, Texas 77843-3123 (United States)
  2. Department of Nuclear Engineering, Texas A and M University, College Station, Texas 77843-3133 (United States)
  3. Materials Physics and Application Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  4. Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843-3128 (United States)
Publication Date:
OSTI Identifier:
21352255
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 105; Journal Issue: 12; Other Information: DOI: 10.1063/1.3138804; (c) 2009 American Institute of Physics; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; ALUMINIUM ALLOYS; BCC LATTICES; COMPOSITE MODELS; FCC LATTICES; HARDNESS; HELIUM; HELIUM IONS; ION BEAMS; LAYERS; MICROSTRUCTURE; NIOBIUM; NIOBIUM ALLOYS; RADIATION HARDENING; SCANNING ELECTRON MICROSCOPY; SPUTTERING; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY; ALLOYS; BEAMS; CHARGED PARTICLES; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CUBIC LATTICES; ELECTRON MICROSCOPY; ELEMENTS; FILMS; FLUIDS; GASES; HARDENING; IONS; MATHEMATICAL MODELS; MECHANICAL PROPERTIES; METALS; MICROSCOPY; NONMETALS; PARTICLE MODELS; PHYSICAL RADIATION EFFECTS; RADIATION EFFECTS; RARE GASES; REFRACTORY METALS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENTS

Citation Formats

Nan, Li, Anderoglu, O, Zhang, X, Martin, M S, Shao, L, Misra, A, and Wang, H. He ion irradiation damage in Al/Nb multilayers. United States: N. p., 2009. Web. doi:10.1063/1.3138804.
Nan, Li, Anderoglu, O, Zhang, X, Martin, M S, Shao, L, Misra, A, & Wang, H. He ion irradiation damage in Al/Nb multilayers. United States. doi:10.1063/1.3138804.
Nan, Li, Anderoglu, O, Zhang, X, Martin, M S, Shao, L, Misra, A, and Wang, H. Mon . "He ion irradiation damage in Al/Nb multilayers". United States. doi:10.1063/1.3138804.
@article{osti_21352255,
title = {He ion irradiation damage in Al/Nb multilayers},
author = {Nan, Li and Anderoglu, O and Zhang, X and Martin, M S and Shao, L and Misra, A and Wang, H},
abstractNote = {We investigate the evolution of microstructure and mechanical properties of sputter-deposited Al/Nb multilayers with miscible fcc/bcc type interface and individual layer thickness, h, of 1-200 nm, subjected to helium ion irradiations: 100 keV He{sup +} ions and a fluence of 6x10{sup 16}/cm{sup 2}. Helium bubbles, 1-2 nm in diameter, are observed. When h is greater than 25 nm, hardnesses of irradiated multilayers barely change, whereas radiation hardening is more significant at smaller h. Transmission electron microscopy and scanning transmission electron microscopy studies reveal the formation of a thin layer of Nb{sub 3}Al intermetallic phase along the Al/Nb interface as a consequence of radiation induced intermixing. The dependence of radiation hardening on h is interpreted by using a composite model considering the formation of the hard Nb{sub 3}Al intermetallic layer.},
doi = {10.1063/1.3138804},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 12,
volume = 105,
place = {United States},
year = {2009},
month = {6}
}