Structure, phase formation and properties of metallic glasses manipulated by electric current

开发结合玻璃和晶态物质的最佳性能的先进复合材料是人们高度感兴趣的科学和技术兴趣。金属玻璃的电流快速热处理是获得先进玻璃基复合材料的一种很有前途的技术。本项目旨在研究CuZrAl金属玻璃的晶化和晶化对力学性能的影响，特别是晶相的选择、晶相和非晶基质的纳米和微观结构、玻璃-晶体界面、变形机制和拉伸应变硬化。这些研究将利用所有可用的技术进行，包括原位高能同步X射线加热和机械载荷衍射、高分辨率电子显微镜和原子探针断层扫描。对于快速加热的原位X射线衍射仪，将建立一套实验装置。焦耳加热用于获得延性金属玻璃复合材料在其他系统中的适用性将被研究。

Development of advanced composite materials combining the best properties of glassy and crystalline matter is of high interest scientific and technological interest. Rapid heat treatment of metallic glasses by electric current is one promising technique for obtaining advanced glass-matrix composites. The present project aims to investigate devitrification of CuZrAl metallic glasses and the effects of crystallization on mechanical properties, in particular, such factors as the selection of crystalline phases, nano- and microstructure of crystalline phases and amorphous matrix, glass-crystal interface, mechanisms of deformation and strain hardening upon tension. The studies will be carried out with using all available techniques including in-situ high-energy synchrotron X-ray diffraction upon heating and mechanical load, high-resolution transmission electron microscopy and atom probe tomography. For the in-situ XRD upon rapid heating an experimental setup will be developed. Applicability of the Joule heating for obtaining ductile metallic glass composites in other systems will be investigated.