Regensburg 2013 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 15: Poster Session
MM 15.37: Poster
Monday, March 11, 2013, 18:00–20:00, Poster E
Electric field gradient at the A site in selected MAX phase solid solutions studied with perturbed γ-γ angular correlation — •Christoph Brüsewitz1, Daniel Jürgens1, Ulrich Vetter1, Hans Hofsäss1, and Michel W. Barsoum2 — 1II. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany — 2Dep. Mat. Sci. & Eng., Drexel University, Philadelphia, PA 19104, USA
MAX phases represent a class of complex carbides and nitrides which combine prominent features of both metals and high performance ceramics. They are good electric and thermal conductors, thermal and mechanical shock resistant, and easily machinable. Perturbed γ-γ angular correlation (PAC) offers, using implanted 111In as probe atom, an insight into the local environment of the probes at the A-sites of many MAX phases by studying the electric field gradient (EFG). Starting with Ti2AlC, the variation of the EFG caused by systematic replacement of half of M atoms with V, A atoms with In, and X atoms with N is investigated. Additionally, these results are compared with the EFG of the corresponding end members V2AlC, Ti2InC, and Ti2AlN. The existence of a single phase is confirmed through XRD. This work is supported by the DFG under contract HO 1125/19-2.