Effect of time on the isothermal viscosity of metallic glass supercooled liquids
Effect of time on the isothermal viscosity of metallic glass supercooled liquids
复制标题
时间对金属玻璃过冷液体等温粘度的影响
DOI：
10.1016/j.jallcom.2020.158067
复制
发表时间：
2021
影响因子：
6.2
通讯作者：
Kumar, Golden
中科院分区：
文献类型：
--
作者：
Jabed, Akib;Meduri, Chandra Sekhar;Kumar, Golden
金属玻璃的粘度被认为在热塑性成形操作期间保持恒定。在这里，我们量化的时间依赖于等温粘度的变化的Pt57.5Cu14.7Ni5.3P22.5和Zr35Ti30Cu8.25Be26.75玻璃形成在过冷液体状态。在热塑性模塑之前将样品等温保持以探测不同时间的粘度。粘度值是从模腔的填充长度中提取的。粘度随着退火时间的增加而增加，并且发现增加的速率在很大程度上与温度和玻璃形成剂的类型无关。然而，在模塑过程中经历较高剪切速率的样品的外部中的粘度增加较高。晶体成核和生长的贡献被认为是解释所观察到的剩余的非晶相的有效粘度的变化。我们的研究结果表明，热塑性成形是一种有效的工具，在分析金属玻璃过冷液体的结构和粘度的细微变化。
The viscosity of metallic glasses is considered to remain constant during thermoplastic forming operations. Here, we quantify the time dependent change in isothermal viscosity of Pt57.5Cu14.7Ni5.3P22.5and Zr35Ti30Cu8.25Be26.75glass formers in the supercooled liquid state. The samples were isothermally held prior to thermoplastic molding to probe the viscosity at different times. The viscosity values were extracted from the filling length of mold cavities. The viscosity increased with annealing time and the rate of increase was found to be largely independent of temperature and type of glass former. However, the viscosity increase was higher in the outer parts of samples which experienced higher shear rate during molding. Crystal nucleation and growth contributions are considered to explain the observed changes in effective viscosity of remaining amorphous phase. Our results suggest that thermoplastic forming is an effective tool in analyzing subtle changes in structure and viscosity of metallic glass supercooled liquids.
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影响因子：
6.2
作者：
Y. Saotome;Y. Fukuda;I. Yamaguchi;A. Inoue
通讯作者：
Y. Saotome;Y. Fukuda;I. Yamaguchi;A. Inoue
影响因子：
3.5
作者：
Hu, Zhonglue;Meduri, Chandra Sekhar;Kumar, Golden
通讯作者：
Kumar, Golden
DOI：
--
发表时间：
1968
期刊：
影响因子：
--
作者：
C. Jansen;B. Giessen;N. Grant
通讯作者：
N. Grant
影响因子：
9.4
作者：
Gross, Oliver;Riegler, Sascha S.;Gallino, Isabella
通讯作者：
Gallino, Isabella