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 Barsoum⁴ — ¹II. 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.