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Size-dependent viscosity in the super-cooled liquid state of a bulk metallic glass

机译：大块金属玻璃在过冷液态下的尺寸依赖性粘度

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摘要

We experimentally investigate the role of sample size on the viscosity of a bulk metallic glass by examining pressure driven flows in nm-scale confinement. A Pt_(57.5)Cu_(14.7)Ni_(5.3)P_(22.5) metallic glass in the super-cooled liquid state is extruded into isolated cylindrical pores of varying nano-scale dimensions, down to 40 nm. The apparent viscosity of the liquid as a function of sample size is determined from the filling depth by appropriate corrections to the Hagen-Poiseuille equation. We observe a striking, sudden increase of the apparent viscosity for dimensions below approximately 100 nm. Results are discussed in the framework of confinement of collective shear events.
机译：我们通过检查纳米尺度范围内的压力驱动流，实验研究了样品量对大块金属玻璃粘度的作用。将处于过冷液态的Pt_（57.5）Cu_（14.7）Ni_（5.3）P_（22.5）金属玻璃挤出到纳米尺寸低至40 nm的孤立圆柱孔中。通过对Hagen-Poiseuille方程进行适当的校正，可根据填充深度确定液体的表观粘度与样品量的关系。对于低于约100 nm的尺寸，我们观察到表观粘度的惊人突然增加。在限制集体剪切事件的框架内讨论了结果。

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  • 来源
    《Applied Physics Letters》 |2013年第22期|221901.1-221901.4|共4页
  • 作者

    Zhen Shao; Manesh Gopinadhan; Golden Kumar; Sundeep Mukherjee; Yanhui Liu; Corey S. OHern; Jan Schroers; Chinedum O. Osuji;

  • 作者单位

    Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, USA,Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA;

    Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, USA,Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA;

    Department of Mechanical Engineering, Texas Tech University, Luhbock, Texas 79409, USA;

    Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76203, USA;

    Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA,Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06520, USA;

    Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA,Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06520, USA,Department of Physics, Yale University, New Haven, Connecticut 06520, USA,Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA;

    Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA,Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06520, USA;

    Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, USA,Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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