期刊
NPJ MICROGRAVITY
卷 5, 期 -, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41526-019-0065-4
关键词
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资金
- German Space Agency DLR [50WM1759]
- European Space Agency ESA [AO-2009-1020]
Here we present measurements of surface tension and viscosity of the bulk glass-forming alloy Pd43Cu27Ni10P20 performed during containerless processing under reduced gravity. We applied the oscillating drop method in an electromagnetic levitation facility on board of parabolic flights. The measured viscosity exhibits a pronounced temperature dependence following an Arrhenius law over a temperature range from 1100 K to 1450 K. Together with literature values of viscosity at lower temperatures, the viscosity of Pd43Cu27Ni10P20 can be well described by a free volume model. X-ray diffraction analysis on the material retrieved after the parabolic flights confirm the glassy nature after vitrification of the bulk samples and thus the absence of crystallization during processing over a wide temperature range.
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