Abstract
Due to their excellent magnetic properties, amorphous metallic alloys (AMAs) are considered for the construction of magnetic cores of radio-frequency cavities in accelerators. Here, they might be exposed to ion bombardment. The influence of irradiation by both light and heavy ions featuring low and high energies, respectively, is followed by the techniques of 57Fe Mössbauer spectrometry. Modifications of surface layers in selected Fe-containing AMAs after ion irradiation are unveiled by detection of conversion electrons and photons of characteristic radiation whereas those in their bulk are derived from standard transmission spectra. Rearrangement of microstructure which favors the formation of magnetically active regions, is observed in surface regions bombarded by light ions. Heavy ions caused pronounced effects in the orientation of net magnetization of the irradiated samples. No measurable impact upon short-range order arrangement was observed. Part I of this paper is devoted to radiation effects in Fe-based AMAs induced by neutron irradiation.
Highlights
Metals 2021, 11, 1309. https://The ability to design, construct, and predict the properties of new materials, which are expected to be used in extreme environments of increased radiation exposure, currently challenges research groups worldwide
The incoming ions can travel within the given material, amorphous metallic alloys (AMAs) in our case, only a well-defined distance which depends upon their type and energy
In Part I of this paper [40], we have discussed radiation effects in amorphous metallic alloys caused by neutron irradiation as revealed by Mössbauer spectrometry
Summary
The ability to design, construct, and predict the properties of new materials, which are expected to be used in extreme environments of increased radiation exposure, currently challenges research groups worldwide. Amorphous metallic alloys (AMAs) occupy a unique position because of their advantageous soft magnetic behavior. Continuous specific research is needed to describe their characteristic physical properties in order to better understand the basic mechanisms involved in radiation processes. AMAs are considered for use in nuclear facilities. All construction materials are exposed to irradiation by lost beam particles. The primary beam particles may interact with the material of the beam-pipe walls and produce secondary particles like light fragments and neutrons. Even low-level beam losses may cause significant radiation load
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