He ion irradiation damage in Al/Nb multilayers

Journal Article · Mon Jun 15 00:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3138804· OSTI ID:21352255

Nan, Li; Anderoglu, O; Zhang, X ^[1]; Martin, M S; Shao, L ^[2]; Misra, A ^[3]; Wang, H ^[4]

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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)

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.

• OSTI ID: 21352255
• Journal Information: Journal of Applied Physics, Vol. 105, Issue 12; Other Information: DOI: 10.1063/1.3138804; (c) 2009 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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