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Nanostructural evolution and behavior of H and Li in ion-implanted γ-LiAlO2
- Source :
- Journal of Nuclear Materials. 494:411-421
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- In-situ He + ion irradiation is performed under a helium ion microscope to study nanostructural evolution in polycrystalline γ-LiAlO 2 pellets. Various locations within a grain, across grain boundaries and at a cavity are selected. The results exhibit He bubble formation, grain-boundary cracking, nanoparticle agglomeration, increasing surface brightness with dose, and material loss from the surface. Similar brightening effects at grain boundaries are also observed under a scanning electron microscope. Li diffusion and loss from polycrystalline γ-LiAlO 2 is faster than its monocrystalline counterpart during H 2 + ion implantation at elevated temperatures. There is also more significant H diffusion and release from polycrystalline pellets during thermal annealing of 300 K implanted samples. Grain boundaries and cavities could provide a faster pathway for H and Li diffusion. H release is slightly faster from the 573 K implanted monocrystalline γ-LiAlO 2 during annealing at 773 K. Metal hydrides could be formed preferentially along the grain boundaries to immobilize hydrogen.
- Subjects :
- Nuclear and High Energy Physics
Materials science
Annealing (metallurgy)
Scanning electron microscope
Analytical chemistry
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
010305 fluids & plasmas
Monocrystalline silicon
Crystallography
Ion implantation
Nuclear Energy and Engineering
0103 physical sciences
General Materials Science
Grain boundary
Crystallite
Irradiation
0210 nano-technology
Field ion microscope
Subjects
Details
- ISSN :
- 00223115
- Volume :
- 494
- Database :
- OpenAIRE
- Journal :
- Journal of Nuclear Materials
- Accession number :
- edsair.doi...........6ffe61597c7aea6d9924abee3c9d7d5f