A unified projection formalism for the Al-Pd-Mn quasi-crystal Xi-approximants and their metadislocations

Engel M, Trebin HR (2005)


Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2005

Journal

Publisher: Taylor & Francis: STM, Behavioural Science and Public Health Titles / Taylor & Francis

Book Volume: 85

Pages Range: 2227-2247

Journal Issue: 20

DOI: 10.1080/14786430500070669

Abstract

The approximants xi, xi' and xi'(n) n of the Al-Mn-Pd quasi-crystal display interesting plastic properties, such as, for example, phason-induced deformation processes and metadislocations. Here we demonstrate that the phases and their deformed or defect states can be described by a simple projection formalism in three-dimensional space-not, as usual, in four to six dimensions. Using this method we can interpret the microstructures observed with electron microscopy as phasonic phase boundaries. Furthermore, we determine the metadislocations of lowest energy and relate them uniquely to experimentally observed ones. Since moving metadislocations in the xi' phase can create new phason planes, we suggest a dislocation-induced phase transition from xi' to xi'(n). The methods developed in this paper can also be applied for various other complex metallic alloys.

Authors with CRIS profile

Involved external institutions

How to cite

APA:

Engel, M., & Trebin, H.-R. (2005). A unified projection formalism for the Al-Pd-Mn quasi-crystal Xi-approximants and their metadislocations. Philosophical Magazine, 85(20), 2227-2247. https://dx.doi.org/10.1080/14786430500070669

MLA:

Engel, Michael, and Hans-Rainer Trebin. "A unified projection formalism for the Al-Pd-Mn quasi-crystal Xi-approximants and their metadislocations." Philosophical Magazine 85.20 (2005): 2227-2247.

BibTeX: Download