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Philosophical Magazine Letters Volume 66, 1992 - Issue 5
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Original Articles

Experimental observations of small-angle grain boundaries in the Al70Co15Ni15 decagonal quasicrystal

Yanfa Yan Laboratory of Material Physics, Department of Physics, Wuhan University, 430072, Wuhan, P.R. China; Beijing Laboratory of Electron Microscopy, Academia Sinica, P.O. Box 2724, 100080, Beijing, P.R. China
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Renhui Wang Laboratory of Material Physics, Department of Physics, Wuhan University, 430072, Wuhan, P.R. China; Beijing Laboratory of Electron Microscopy, Academia Sinica, P.O. Box 2724, 100080, Beijing, P.R. China
Pages 253-258 | Received 28 May 1992, Accepted 20 Jul 1992, Published online: 20 Aug 2006
 
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Abstract

According to the characteristics of the dislocations of which the small-angle grain boundaries consist, three kinds of small-angle grain boundary have been observed in annealed Al70Co15Ni15 decagonal phase for the first time by transmission electron microscopy: A tilt boundary consisting of an edge-dislocation wall; a twist boundary consisting of parallel screw-dislocation pairs; a small-angle grain boundary consisting of a dislocation network.

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