In Situ Investigation of Structural Evolution in Zr46Cu46Al8 and Zr56Cu36Al8 Bulk Metallic Glasses During Isothermal Annealing

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2024-08-07 DOI:10.1007/s11837-024-06808-8

Xuelian Wu, Xiyang Li, Zhenduo Wu, Xun-Li Wang, Xiaoya Wei, Jie Zhou, Zhaoping Lu, Elliot Paul Gilbert, Zhengming Sun, Jianxiang Ding, Dongming Liu, Chenchen Yuan, Si Lan

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引用次数: 0

Abstract

The crystallization kinetics of Zr₄₆Cu₄₆Al₈ and Zr₅₆Cu₃₆Al₈ bulk metallic glasses (BMGs) during isothermal annealing in the supercooled liquid region has been studied using in situ simultaneous differential scanning calorimetry (DSC) and small-angle neutron scattering (SANS) technique. Zr₄₆Cu₄₆Al₈, known for its good glass forming ability (GFA), exhibits a complex crystallization pathway. Initially, a transition region emerges, eventually evolving into the thermodynamically stable crystalline phase of Cu₁₀Zr₇, facilitated by continuous chemical redistribution at the late stage of annealing. In contrast, Zr₅₆Cu₃₆Al₈, a poor glass former, crystallizes directly into the thermodynamically stable crystalline phase of CuZr₂ in a single step, with no observed chemical redistribution. Overall, the results suggest that continuous chemical redistribution following structural ordering may contribute to stabilizing the amorphous state and improving the thermal stability of BMGs. This study highlights the critical role of chemical redistribution in the crystallization of BMGs and introduces a new perspective for assessing their GFAs.

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等温退火过程中 Zr46Cu46Al8 和 Zr56Cu36Al8 块状金属玻璃结构演变的现场研究

利用原位同步差示扫描量热仪（DSC）和小角中子散射（SANS）技术，研究了 Zr46Cu46Al8 和 Zr56Cu36Al8 块状金属玻璃（BMGs）在过冷液体区等温退火过程中的结晶动力学。Zr46Cu46Al8 以其良好的玻璃化能力（GFA）而闻名，它的结晶过程十分复杂。起初，会出现一个过渡区，最终演变成热力学稳定的 Cu10Zr7 结晶相，退火后期的持续化学再分布促进了这一过程。与此相反，Zr56Cu36Al8 是一种较差的玻璃成形剂，它只需一步就能直接结晶成热力学稳定的 CuZr2 结晶相，而且没有观察到化学再分布。总之，研究结果表明，结构有序化后的连续化学再分布可能有助于稳定非晶态并提高 BMG 的热稳定性。这项研究强调了化学再分布在 BMGs 结晶过程中的关键作用，并为评估其 GFAs 引入了一个新的视角。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.