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MM: Fachverband Metall- und Materialphysik

MM 13: Topical Session: Quasicrystals & Complex Metallic Alloys III

MM 13.3: Talk

Monday, March 11, 2013, 16:15–16:30, H25

Metadislocation core structure in the complex metallic alloy Al₁₃Co₄ — •Marc Heggen and Michael Feuerbacher — Peter Grünberg Institut, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany

We have analysed metadislocations in the complex alloy Al₁₃Co₄. The core structure is studied using aberration-corrected high-resolution scanning transmission electron microscopy. Different types of metadislocations with Burgers vectors of b = +/-tau⁻ⁿ b (0 1 0) (n = 3, 4) are found which are associated to four and six planar defects, respectively. They are escorted by phason defects and move, in contrast to metadislocations in most other complex alloys, by pure glide.