ИСТИНА

The possibilities of hardening of metal alloys with crystal structure are close to exhaustion. Using materials containing glassy phase (or both glassy and crystalline) is one of way to solve this problem. Such alloys demonstrate high level of mechanical properties, significantly exceeding the level of properties achieved for their crystalline analogues. The chemical composition and atomic structure of metallic glasses determine their properties, in particular, their mechanical properties. The role of liquid phase in the glass formation is critical, while information about liquid's structure can be obtained only using diffraction studies. In this regard a study of the glassy and liquid structure of glass-forming alloys is one of the most important problems of materials science at present. Al90Y10 model glass-forming alloy and, for comparison, Al70Cu30 alloy were chosen for this research work. The purpose of our study was to conduct in-situ studies of the atomic structure changes in a liquid state of Al90Y10 and Al70Cu30 alloys over a long-term isothermal exposure.