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Oxidation of a Zr 46 Cu 4 6 Al 7 Gd 1 bulk metallic glass detected via optical characterizations
Science China Materials ( IF 6.8 ) Pub Date : 2020-11-04 , DOI: 10.1007/s40843-020-1497-0
Weijie Xie , Mingxing Li , Jiashu Cao , Liwei Hu , Chao Wang , Weihua Wang , Yanhui Liu

Oxidation of metallic glasses has been shown to be different from crystalline alloys due to the disordered atomic structures and far-from-equilibrium state, and quick characterization is required to reveal their early stage oxidation. In this study, we investigated the oxidation behavior of a Zr46Cu46Al7Gd1 bulk metallic glass by measuring the changes of optical constants via spectroscopic ellipsometry. Characterizations with X-ray diffraction, scanning electron microscopy, and thermogravimetric analyzer confirmed that the changes of pseudo-optical constants reflected not only the onset temperature at which the alloys underwent obvious oxidation, but also the subtle oxidation which was tedious to characterize. Our study suggests a more efficient and accurate approach to understand the oxidation of metallic glasses with temperature, time and compositions.



中文翻译:

通过光学表征检测到Zr 46 Cu 4 6 Al 7 Gd 1大块金属玻璃的氧化

由于无序原子结构和远离平衡状态,金属玻璃的氧化已被证明与结晶合金不同,因此需要快速表征才能揭示其早期氧化。在这项研究中,我们调查了Zr的氧化行为46的Cu 4 67的Gd 1个通过测量光学常数的变化块状金属玻璃通过光谱椭圆偏振法。通过X射线衍射,扫描电子显微镜和热重分析仪进行表征,证实了准光学常数的变化不仅反映了合金明显氧化的起始温度,而且反映了难以表征的微妙氧化。我们的研究提出了一种更有效和准确的方法来理解金属玻璃随温度,时间和成分的氧化。

更新日期:2020-11-09
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