MARCIN NABIALEK THE INFLUENCE OF HEAT TREATMENT ON THE SHAPE OF 57FE HYPERFINE FIELD INDUCTION DISTRIBUTION IN MASSIVE AMORPHOUS FE61CO10Y8X1B20 (WHERE X = MO, W) The paper presents the results of Mossbauer research for massive amorphous alloys Fe61Co10Y8Mo1B20 and Fe61Co10Y8W1B20 manufactured using the method of suction of a liquid alloy into a copper water-cooled mold and subjected to thermal treatment at a temperature of 700K / 60 min and 770K / 210 min. The treatment was carried out below the crystallization temperature and it did not lead to the creation in the volume of alloys of crystalline systems showing long-range order of atoms. Mössbauer research was performed for low energy milled plates in transmission geometry. Then, numerical analysis of these spectra was performed and the corresponding hyperfine field distributions were obtained 57Fe. It has been shown that isothermal annealing has a big influence on the shape of the hyperfine field distribution. As a result of thermal processing, diffusion of the components took place, which caused the occurrence of diverse environments of iron atoms around the central atom. In the volume of all specimens, there was a lack of topological order in the arrangement of atoms.
Keywords: bulkamorphous materials, Mössbauer effect, hyperfine field induction 57Fe