Abstract
Structural transformations that are taking place in metallic glasses have severe impact upon their performance in variety of practical applications. Their originally amorphous structure changes under elevated temperature. Eventually, partial crystallization occurs. In order to follow the development of crystallization, the investigation of heat treatment of Fe-based metallic glasses was performed. Modifications in structure were studied by employing in-situ techniques of synchrotron radiation. Namely, diffraction experiments and nuclear forward scattering of synchrotron radiation are reported. Both methods of study were performed on-fly providing information about the state of the samples in real time.
Highlights
The atomic arrangement in metallic glasses (MG) is not well understood at present unlike the well-defined long-range order in crystalline materials
Yavari et al [1] presented that the structural relaxation processes of MGs can be studied in-situ by X-ray diffraction using intensive synchrotron radiation
As we have demonstrated above, diffraction of synchrotron radiation (DSR) can be effectively used to describe the structural properties of MGs that are undergoing temperature induced transformations including first and second crystallization steps
Summary
The atomic arrangement in metallic glasses (MG) is not well understood at present unlike the well-defined long-range order in crystalline materials. Yavari et al [1] presented that the structural relaxation processes of MGs can be studied in-situ by X-ray diffraction using intensive synchrotron radiation. They showed that microscopic structural changes can be successfully correlated with macroscopic characteristics such as a thermal expansion coefficient. NRS uses atoms of 57Fe as probes of the local magnetic and electronic properties in the investigated samples and provide information on hyperfine interactions Application of this technique is helpful in revealing the mutual relation between the magnetic arrangement and the structure of the studied materials and it can be used in a dynamic in-situ regime. DSR whereas evolution of hyperfine interactions is discussed using the results of NFS
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