Newtonian and non-Newtonian viscosity of supercooled liquid in metallic glasses
書誌事項
- 公開日
- 2001-05
- 権利情報
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- https://www.elsevier.com/tdm/userlicense/1.0/
- DOI
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- 10.1016/s0921-5093(00)01562-8
- 公開者
- Elsevier BV
この論文をさがす
説明
Abstract We have investigated the viscosity of the supercooled liquids over a wide range of strain rate by constant-strain-rate tensile tests for La 55 Al 25 Ni 20 , Zr 65 Al 10 Ni 10 Cu 15 and Pd 40 Cu 40 P 20 (at.%) metallic glasses. The supercooled liquids exhibited Newtonian viscosity (equilibrium state) that transferred to a non-Newtonian viscosity (non-equilibrium state) with increasing temperature. The critical strain rate of the Newtonian viscosity increased with increasing temperature in accordance with the Arrhenius relation. The strain rate dependence of viscosity was described well with a master curve expressed by a stretched exponential function η/η 0 =1− exp (C/ e β ) . The Newtonian viscosity was successfully described with the free-volume model of Cohen and Grest. The fragility of the Newtonian viscosity revealed that the supercooled liquids of the metallic glasses were classified into the relatively strong liquids such as Ge 10 As 10 Se 80 , B 2 O 3 and Na 2 O–2SiO 2 glass formers.
収録刊行物
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- Materials Science and Engineering: A
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Materials Science and Engineering: A 304-306 674-678, 2001-05
Elsevier BV