J. Phys. Colloques
Volume 51, Numéro C4, Juillet 1990Multilayer Amorphisation by Solid-State-Reaction and Mechanical Alloying
|Page(s)||C4-157 - C4-162|
J. Phys. Colloques 51 (1990) C4-157-C4-162
SOLID-STATE REACTION OF Zr-Fe MULTILAYERED FILMS INVESTIGATED BY MÖSSBAUER SPECTROSCOPYC. MICHAELSEN1, M. PIEPENBRING2 et H.U. KREBS2
1 GKSS - Forschungszentrum Geesthacht GmbH, Max - Planck - StraBe, D - 2054 Geesthacht
2 Institut für Metallphysik, Hospitalstrasse 3-5, D-3400 Göttingen, F.R.G.
Multilayered Zr - Fe films of average composition Zr50Fe50 were prepared by sputtering. The samples were solid - state reacted and subsequently investigated by Conversion Electron Mössbauer Spectroscopy (CEMS). Already in the as - deposited multilayer an amorphous interlayer is detected. In the early stage of the interdiffusion reaction a Mössbauer spectrum is observed which is typical for an amorphous Zr - rich phase of concentration near Zr2Fe. After further annealing a completely amorphous film can be reached. Differences between solid - state reacted, mechanically alloyed, melt - quenched and especially co - sputtered Zr - Fe samples can be observed in the middle of the concentration range. However, these differences can be reduced by a heat treatment, which changes the atomic arrangement around the Fe atoms and leads to the appearance of direct Fe - Fe contacts.