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Title
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Positron annihilation study of nanocrystalline : simulations and measurements
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Author
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Abstract
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| A positron lifetime experiment is performed on samples produced by the compaction of nanocrystalline Ni3Al powder synthesized by the inert-gas condensation technique. In the lifetime spectrum we observe two components corresponding to defects. Computer (virtual) samples of n-Ni3Al are obtained using molecular dynamics combined with the Metropolis Monte Carlo technique. Positron lifetime calculations are then performed on selected regions of simulated samples. For this purpose, a new computational technique based on a generalization of the atomic superposition method for non-periodic systems was developed. Lifetimes calculated in this way are compared to experiment. |
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Language
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English
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Source (journal)
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Materials science forum. - Lausanne, 1984, currens
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Source (book)
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12th International Conference on Positron Annihilation (ICPA-12), AUG 06-12, 2000, UNIV BUNDERSWEHR MUNCHEN, NEUBIBERG, GERMANY
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Publication
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Lausanne
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2001
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ISBN
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0-87849-875-3
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DOI
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10.4028/WWW.SCIENTIFIC.NET/MSF.363-365.94
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Volume/pages
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363-3
(2001)
, p. 94-96
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ISI
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000170202400023
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Full text (Publisher's DOI)
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