Microstructure of Fragile Metallic Glasses Inferred from Ultrasound-Accelerated Crystallization in Pd-Based Metallic Glasses

T. Ichitsubo; E. Matsubara; T. Yamamoto; H. S. Chen; N. Nishiyama; J. Saida; K. Anazawa

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Microstructure of Fragile Metallic Glasses Inferred from Ultrasound-Accelerated Crystallization in Pd-Based Metallic Glasses

机译：钯基金属玻璃中超声加速结晶过程推断出的易碎金属玻璃的微观结构

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By utilizing ultrasonic annealing at a temperature below (or near) the glass transition temperature T_g, we revealed a microstructural pattern of a partially crystallized Pd-based metallic glass with a high-resolution electron microscopy. On the basis of the observed microstructure, we inferred a plausible microstructural model of fragile metallic glasses composed of strongly bonded regions surrounded by weakly bonded regions (WBRs). The crystallization in WBRs at such a low temperature under the ultrasonic vibrations is caused by accumulation of atomic jumps associated with the β relaxation being resonant with the ultrasonic strains. This microstructural model successfully illustrates a marked increase of elasticity after crystallization with a small density change and a correlation between the fragility of the liquid and the Poisson ratio of the solid.

机译：通过在低于（或接近）玻璃化转变温度T_g的温度下进行超声退火，我们用高分辨率电子显微镜揭示了部分结晶的Pd基金属玻璃的微观结构图。基于观察到的微观结构，我们推断出一个脆弱的金属玻璃的微观结构模型，该模型由被弱结合区域（WBR）包围的强结合区域组成。在这样的低温下，在超声波振动下，WBR中的结晶是由于与β弛豫相关的原子跃迁的累积而引起的，该原子跃迁与超声应变共振。该微结构模型成功地说明了结晶后弹性的显着增加，密度变化很小，并且液体的脆性与固体的泊松比之间具有相关性。

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来源
《Physical review letters》 |2005年第24期|p.245501.1-245501.4|共4页
作者
T. Ichitsubo; E. Matsubara; T. Yamamoto; H. S. Chen; N. Nishiyama; J. Saida; K. Anazawa;
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Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan;

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正文语种 eng
中图分类物理学;
关键词
structural modeling: serial-addition models; computer simulation; glasses; elasticity; elastic constants; anelasticity; internal friction; stress relaxation; and mechanical resonances;

机译：结构建模：串行添加模型;计算机模拟;玻璃;弹性;弹性常数;无弹性;内部摩擦压力松弛和机械共振;

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1. Kinetics of crystallization process for Pd-based bulk metallic glasses [J] . Li Liu, Xiangjin Zhao, Chaoli Ma Intermetallics . 2009,第4期

机译：钯基块状金属玻璃的结晶过程动力学
2. Crystallization accelerated by ultrasound in Pd-based metallic glasses [J] . Tetsu Ichitsubo, Eiichiro Matsubara, Kazuhiro Anazawa Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics . 2007,第0期

机译：超声加速钯基金属玻璃中的结晶
3. Non-isothermal crystallization kinetics and fragility of Zr56Co28Al16 and Zr56Co22Cu6Al16 bulk metallic glasses [J] . Rahvard Masoud Mohammadi, Tamizifar Morteza, Boutorabi Seyed Mohammad Ali Journal of thermal analysis and calorimetry . 2018,第2期

机译：非等温结晶动力学和Zr56Co28Al16和Zr56CO222Cu6A16散装金属玻璃的脆性
4. Crystallization accelerated by ultrasound in Pd-based metallic glasses [C] . Tetsu Ichitsubo, Eiichiro Matsubara, Kazuhiro Anazawa, International Symposium on Metastable and Nano-Materials(ISMANAM-2005); 20050703-07; Paris(FR) . 2005

机译：超声加速钯基金属玻璃中的结晶
5. Using Artificial Microstructures Approach to Decode Microstructure- Property-Processing Relationships in Metallic Glasses and Metallic Glass Architectures. [D] . Chen, Wen. 2016

机译：使用人工微结构方法来解码金属玻璃和金属玻璃建筑中的微结构-性能处理关系。
6. Thermal expansion of Pd-based metallic glasses by ab initio methods and high energy X-ray diffraction [O] . Simon Evertz, Denis Music, Volker Schnabel, -1

机译：从头开始方法和高能X射线衍射法对Pd基金属玻璃的热膨胀
7. Microstructure of fragile metallic glasses inferred from ultrasound-accelerated crystallization in Pd-based metallic glasses [O] . Ichitsubo T, Matsubara E, Yamamoto T, 2005

机译：超声加速Pd基金属玻璃结晶过程推断出的易碎金属玻璃的微观结构
8. Kinetics of Structural Relaxtion in Pd-Based Metallic Glasses as Observed by Changes in Electrical Resistivity [R] . Kelton, K. F., Spaepen, F. 1981

机译：电阻率变化观察pd基金属玻璃结构弛豫动力学

Microstructure of Fragile Metallic Glasses Inferred from Ultrasound-Accelerated Crystallization in Pd-Based Metallic Glasses

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