Regensburg 2007 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 9: Liquid and amorphous materials III
MM 9.4: Talk
Monday, March 26, 2007, 15:30–15:45, H4
Microstructure and properties of glassy NdCoAl alloys with Ga and Nb additions — •Mihai Stoica1, Mihaela Buschbeck2, Annett Gebert2, Ludwig Schultz2, Albrecht Wiedenmann3, Olivier Perroud3, Shankar Wenkataraman1, Simon Pauly1, and Jürgen Eckert1 — 1IFW Dresden, Institute for Complex Materials, P.O. Box 270016, D-01171 Dresden, Germany — 2IFW Dresden, Institute for Metallic Materials, P.O. Box 270016, D-01171 Dresden, Germany — 3Hahn-Meitner Institute Berlin, Glienickerstr. 100, D-14109 Berlin, Germany
The glass forming ability and structure upon fast cooling were investigated for Nd60Co30Al10 with Ga and Nb additions. The investigated alloys contained 1, 3 and 5 at. % of Ga or Nb. From every composition different samples were produced. The melt spinning apparatus was used to make glassy ribbons 4 mm wide and 0.03 mm thick and by copper mould casting rods with diameters of 1 and 2 mm were cast. The structure of the samples was investigated by means of X-ray diffraction and electronic microscopy and the thermal stability by differential scanning calorimetry (DSC). In order to rule out the effect of composition and cooling conditions, the microstructure and thermal behaviour of master alloys with and without Ga and Nb additions were also checked. The paper will discuss the microstructure formation for different samples, as a function of two parameters: the composition and the cooling rate. The work was supported by the German Science Foundation (DFG) via the DFG priority program *Phasenumwandlungen in mehrkomponentigen Schmelzen*.