期刊
ACTA MATERIALIA
卷 53, 期 17, 页码 4733-4742出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2005.06.026
关键词
magnesium alloys; quasicrystals; orientation relationships; twinning; electron diffraction
Five possible orientation relationships OR1 to OR5 of icosahedral quasicrystal with magnesium matrix are derived and experimental evidences are shown. In three of these, an icosahedral twofold axis occurs along the hexagonal axis of magnesium, symmetrically in the case of OR1 and OR2 and asymmetrically in OR5. A fivefold axis occurs along the magnesium hexagonal axis in OR3. An icosahedral mirror zone axis occurs along the hexagonal axis in OR4. These orientation relationships are related by {102} twinning of magnesium or twinning of the icosahedral phase. OR2 and OR3 can form from the OR1 by a {102} twinning of the matrix. At the same time, twinning of an icosahedral phase which makes OR1 with magnesium can create OR3 with the same matrix. OR4 forms on a particular twinning of the icosahedral phase in OR1 and OR2 while OR5 can be derived by a twinning of the icosahedral phase in OR3. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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