Thermophysical properties of non-Zr-based multicomponent bulk metallic glass alloys

非Zr基多元大块金属玻璃合金的热物理性能

基本信息

批准号：
214287390
负责人：
Professorin Dr. Isabella Gallino, Ph.D.
金额：
--
依托单位：
Institut für Werkstoffwissenschaften und -technologien
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/214287390?language=en
关键词：
Thermophysical properties non Zr based

项目摘要

The present project deals with the thermophysical properties of known non-Zr-based bulk metallic glass (BMG) formers. The selected BMG systems are based on noble metals, on Mg, and two newly developed systems: the Ni-Cr-Nb-P-B system, and the steel system: Fe-Mo-Ni-Cr-P-C-B. The latter two BMG systems are not only of scientific interest but are also expected of great practical importance. The project goal is to identify to what extent the glass forming ability and the fragility of the undercooled liquid is influenced by the thermodynamics, and in particular: how much does the fragility correlate with the activation energy for cooperative atomic rearrangements in the supercooled liquid? How does this compare with the activation energies for diffusion? Is there any indication of a strong-to-fragile transition in these alloys? To what extent do nucleation-controlled crystallization processes dominate at high temperatures, in comparison with growth-controlled processes? How does annealing, or aging, near the glass transition temperature affect viscous flow and crystallization?The investigations will employ an ensemble of experimental techniques including differential scanning calorimetry (DSC/MDSC), dynamic mechanical analysis (DMA), dilatometry (TMA), x-ray photon correlation spectroscopy (XPCS), and in-situ high-intensity synchrotron X-ray scattering. Combined with the previous results, this will enable a comprehensive description of the thermodynamic, kinetic, and structural aspects for this class of non-equilibrium condensed matter and aim to gain new insights into the glass forming nature of BMG forming systems in general.

本项目涉及已知的非ZR基体金属玻璃（BMG）的表格的热物理特性。选定的BMG系统基于MG上的高贵金属，以及两个新开发的系统：NI-CR-NB-P-B系统和钢系统：Fe-Mo-Ni-Cr-p-p-c-b。后两个BMG系统不仅具有科学兴趣，而且期望具有很大的重要性。项目目标是确定玻璃形成能力的程度和过冷液体的脆弱性受热力学的影响，尤其是：脆弱性与超冷液体中合作原子重排的激活能量有多少相关？这与扩散的激活能相比如何？是否有任何迹象表明这些合金中有强到碎片过渡？与生长控制的过程相比，成核控制的结晶过程在高温下占主导地位？玻璃过渡温度附近的退火或衰老如何影响粘性流量和结晶？研究将采用包括差异扫描量热法（DSC/MDSC），动态机械分析（DMA），扩张（TMA），扩张（TMA），X射线光子相关光谱（X-Ray PhotoNation corelation Stterpopopy（xpcs）和xpcs和S-S-SITU的共同构图，调查将采用包括差异扫描量热法（DSC/MDSC）的实验技术合成。结合先前的结果，这将使对这类非平衡凝结物质的热力学，动力学和结构方面进行全面描述，并旨在获得对总体上BMG形成系统的玻璃形成性质的新见解。