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Regensburg 2007 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 29: Intermetallic phases II

MM 29.2: Talk

Thursday, March 29, 2007, 12:00–12:15, H16

First PAC experiments in MAX phases — •Michael Uhrmacher1, Hans Hofsäss1, Jens Röder2, Pawel Wodniecki3, Agnieszka Kulinska3, and Michel Barsoum41II. Physiklisches Institut, Uni Göttingen, Germany — 2TU Braunschweig, Braunschweig, Germany — 3IFJPAN, 31-342 Krakow, Poland — 4Drexel University, Philadelphia, USA

MAX phases are layered, hexagonal ternary carbides and nitrides which combine some of the best attributes of metals and ceramics: like metals, they are electrically and thermally conductive and most readily machinable. Like ceramics, they are elastically rigid, lightweight and maintain their strength to high temperatures.

PAC experiments with implanted 111In have been performed to establish the PAC signal typical for substitutional probes on the In-site in the two MAX compounds Ti2InC and Zr2InC. This determination will be the key to investigate by PAC the microstructure of the full class of MAX phases (about 50 compounds) which do not necessarily contain In ions in the structure. Annealing, thermal stability and first experiments under compresive stress are reported.

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