Fast-current-heating devices to study in situ phase formation in metallic glasses by using high-energy synchrotron radiation.
Fast-current-heating devices to study in situ phase formation in metallic glasses by using high-energy synchrotron radiation.
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DOI：
10.1063/5.0005732
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发表时间：
2020-07
期刊：
影响因子：
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通讯作者：
J. Orava;K. Kosiba;Xiaoliang Han;I. Soldatov;O. Gutowski;O. Ivashko;A. Dippel;M. Zimmermann
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文献类型：
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作者：
J. Orava;K. Kosiba;Xiaoliang Han;I. Soldatov;O. Gutowski;O. Ivashko;A. Dippel;M. Zimmermann
详细的快速电阻加热装置，控制加热范围从101 K s-1至103 K s-1，研究原位相变（加热和冷却）在金属玻璃的高能同步辐射X射线衍射进行了讨论。这两种装置都是在德累斯顿莱布尼茨固态和材料研究所（IFW Dresden）设计和定制的，并已在汉堡DESY的PETRA III储存环的P02.1粉末衍射和总散射光束线和P21.1瑞典材料科学光束线上实施。该装置在两个光束线处可互换。焦耳加热是自动触发的，并与入射光束和检测器同步。结晶过程可以通过反馈电路通过监测玻璃随时间变化的电阻率和温度的变化来控制。不同的环境气氛，如真空和惰性气体（He和Ar），可用于控制氧化和冷却。这些设备的主要重点是了解金属玻璃的结晶机制和动力学，这些玻璃是脆性的，快速加热可以提供具有增强塑性的玻璃-晶体复合材料。作为一个例子，在原型Cu-Zr基金属玻璃的相变序列（S）进行了描述加热，并确定了有利于塑性的结晶相。
Details of fast-resistive-heating setups, controlled heating ranging from ∼101 K s-1 to ∼103 K s-1, to study in situ phase transformations (on heating and on cooling) in metallic glasses by high-energy synchrotron x-ray diffraction are discussed. Both setups were designed and custom built at the Leibniz Institute for Solid State and Materials Research Dresden (IFW Dresden) and have been implemented at the P02.1 Powder Diffraction and Total Scattering Beamline and the P21.1 Swedish Materials Science Beamline at PETRA III storage ring, DESY, Hamburg. The devices are interchangeable at both beamlines. Joule heating is triggered automatically and is timed with the incident beam and detector. The crystallization process can be controlled via a feedback circuit by monitoring the change in the time-dependent resistivity and temperature of glasses. Different ambient atmospheres, such as vacuum and inert gases (He and Ar), can be used to control oxidation and cooling. The main focus of these devices is on understanding the crystallization mechanism and kinetics in metallic glasses, which are brittle and for which fast heating gives defined glass-crystal composites with enhanced plasticity. As an example, phase-transformation sequence(s) in a prototyped Cu-Zr-based metallic glass is described on heating, and a crystalline phase beneficial to the plasticity is identified.