Influence of temperature on viscous flow deformation of Zr55Cu30Al10Ni5 bulk glassy alloy in supercooled liquid region

Zhu, Shengli; Wang, X.M.; Qin, Fengxiang; Inoue, Akihisa

doi:10.1016/j.intermet.2006.10.047

Cited by 11 publications

(9 citation statements)

References 38 publications

(17 reference statements)

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“…4 as a function of the temperature. The viscosity values are between 10 10 to 10 13 Pa s within the temperature window 683-738 K. The viscosities of Zr 55 Cu 30 Al 10 Ni 5 BMG measured in this work are similar to results of Zhu et al [7].…”

Section: Resultssupporting

confidence: 90%

“…In the glass transition region, the viscosity of metallic glasses decreases markedly, and the temperature dependence is usually described by the Vogel-Fulcher-Tammann (VFT) formula. Since the formation of Zr 55 Cu 30 Al 10 Ni 5 BMG was firstly reported by Inoue and Zhang [4], its viscosity has been measured by many researchers [3,[5][6][7][8]. The aim of this paper is to introduce a new method to measure the viscosity of Zr 55 Cu 30 Al 10 Ni 5 BMG.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Viscosity of Zr55Cu30Al10Ni5 bulk metallic glass measured by laser viscometer

Liu

Fang

et al. 2010

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 98%

Viscosity of Zr55Cu30Al10Ni5 bulk metallic glass measured by laser viscometer

Liu

Fang

et al. 2010

Journal of Alloys and Compounds

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“…This is due to the viscous flow which can occur at the high temperature above 0:7T g . 22) In the present work, the sintering temperature is 643 K, which is higher than 0:7T g (0:7 Â 665 K ¼ 465:5 K). The viscous flow of the glassy alloy powder causes the reduction of the pores in the sintered samples.…”

Section: )mentioning

confidence: 59%

Synthesis of Ti-Based Glassy Alloy/Hydroxyapatite Composite by Spark Plasma Sintering

et al. 2008

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The spark plasma sintering process has been used to fabricate Ti 40 Zr 10 Cu 36 Pd 14 glassy alloy/hydroxyapatite composites. XRD, DSC, SEM and compression testes were used to examine the microstructure and properties of the composites. No crystallization was observed in the glassy alloy matrix. The glass transition temperature (T g ) is independent of the HA addition and the onset temperature of crystallization (T x ) slightly decreases with increasing HA content. The sintered composite exhibited reduced value of Young's moduli as compared with the as-cast Ti 40 Zr 10 Cu 36 Pd 14 bulk glassy alloy.

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“…Bigger relative displacements can be obtained when the temperature is in the range from 713 to 733 K. 17) The effect of the viscous flow deformation under various temperatures on the T g , ÁT x , ÁH=ÁH as-cast and hardness had been discussed in our previous work. 18) With increasing deformation temperature, T g increases and the endothermic glass transition event becomes weak. When the deformation temperature is higher than 733 K, T g can't be detected by DSC with a heating rate of 0.67 K/s.…”

Section: Effect Of Temperature On Viscous Flow Behaviormentioning

confidence: 99%

“…The nano-scale precipitates distributed in the glassy alloy were identified as CuZr 2 by EDS and SAED. 18) With increasing time, the structure relaxation would be more sufficient and free volume decrease. When the temperature is relatively high, such as 723 K, the nanocrystalization occurs.…”

Section: Effect Of Time On Viscous Flow Behaviormentioning

confidence: 99%

The Influence of Viscous Flow Deformation on the Thermal Stability and Hardness of ZrCuAlNi Bulk Glassy Alloy

et al. 2007

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We investigated the thermal stability and hardness of a Zr 55 Cu 30 Al 10 Ni 5 bulk glassy alloy after isothermal viscous flow deformation in the supercooled liquid region. The influence of deformation temperature, holding time and initial strain rate on the thermal stability and hardness of a Zr 55 Cu 30 Al 10 Ni 5 bulk glassy alloy subjected to the high temperature compression test was examined by differential scanning calorimetry (DSC) and with a Vickers micro-hardness tester. The results showed that the incubation time for isothermal annealing crystallization reduced during the viscous flow deformation. Thermal stability of supercooled liquid decreased after viscous flow deformation. As the deformation temperature increased, the SCL region decreases. At lower temperatures below 713 K the structural relaxation occurred, resulting in a slight increase in hardness. The crystallization at higher temperatures of over 723 K caused a rapid increase in hardness. The supercooled liquid region decreased and the hardness increased with increasing deformation time. Higher strain rate resulted in larger deformation in the same deformation time, and had slight influence on the thermal stability and hardness of the Zr 55 Cu 30 Al 10 Ni 5 glassy alloy. When the Zr 55 Cu 30 Al 10 Ni 5 bulk glassy alloy was compressed for 300 s with an initial strain rate of 3:3 Â 10 À3 s À1 at the temperatures of 723 K, nanocrystallization occurred, and the grain size was evaluated to be smaller than 5 nm.

show abstract

Influence of temperature on viscous flow deformation of Zr55Cu30Al10Ni5 bulk glassy alloy in supercooled liquid region

Cited by 11 publications

References 38 publications

Viscosity of Zr55Cu30Al10Ni5 bulk metallic glass measured by laser viscometer

Viscosity of Zr55Cu30Al10Ni5 bulk metallic glass measured by laser viscometer

Synthesis of Ti-Based Glassy Alloy/Hydroxyapatite Composite by Spark Plasma Sintering

The Influence of Viscous Flow Deformation on the Thermal Stability and Hardness of ZrCuAlNi Bulk Glassy Alloy

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