Regensburg 2002 – wissenschaftliches Programm

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M: Metallphysik

M 26: Postersitzung

M 26.16: Poster

Donnerstag, 14. März 2002, 14:30–16:30, Saal C

From multi-component amorphous alloys to complex phase structure in Ti-based systems — •Adrian Jianu, Radu Nicula, and Eberhard Burkel — Rostock University, August-Bebel-Str. 55, D-18051, Rostock

A wide range of applications of titanium-based alloys and composites (e.g. biomaterials, hydrogen storage, thermal barriers, electrodes in electrochemical processes, etc) has been developed. In this paper we report on the phase transformation kinetics of Ti-based metallic glasses and on the evolution from amorphous structure to a mixture of complex structural phases. In situ high-temperature non-isothermal and isothermal x-ray powder diffraction experiments using synchrotron radiation, complementary differential scanning calorimetry and transmission electron microscopy were used to characterize the materials. The addition of a small amount of Ag strongly increases the stability of the amorphous phase and reduces the size of the icosahedral crystals, while for higher Ag concentrations, the formation of spherical silver nanoparticles within the amorphous matrix was noticed.