Multiple maxima of GFA in three adjacent eutectics in Zr–Cu–Al alloy system – A metallographic way to pinpoint the best glass forming alloys

Wang, D.; Tan, H.; Li, Y.

doi:10.1016/j.actamat.2005.03.012

Cited by 228 publications

(132 citation statements)

References 35 publications

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“…Addition of 5-6 at% Al to Cu 50 Zr 50 shifts the composition from the line compound (CuZr) and the Cu-Zr-Al alloys solidify to a primary CuZr (B2) phase ( Fig. 1(d)) 20,21) and a eutectic matrix. A typical microstructure of Cu 47 Zr 47 Al 6 AMI is presented in Fig.…”

Section: Methodsmentioning

confidence: 99%

Ductile Metallic Glasses in Supercooled Martensitic Alloys

Das¹,

Kim

Xu³

et al. 2006

Mater. Trans.

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We report ductile bulk metallic glasses based on martensitic alloys. The slowly cooled specimens contain a mixture of parent 'austenite' and martensite phase. The slightly faster cooled bulk metallic glasses with 2-5 nm sized 'austenite'-like crystalline cluster reveal high strength and large ductility (16%). Shear bands propagate in a slither mode in this spatially inhomogeneous glassy structure and undergo considerable 'thickening' from 5-25 nm. A 'stress induced displacive transformation' is proposed to be responsible for both plasticity and work-hardeninglike behavior of these 'M-Glasses'.

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Section: Methodsmentioning

confidence: 99%

Ductile Metallic Glasses in Supercooled Martensitic Alloys

Das¹,

Kim

Xu³

et al. 2006

Mater. Trans.

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“…Further samples from the same batch have been oxidized in air at T = 504 K for 30 min and 60 min. The temperature was selected well below the glass transition on-set temperature T g, on-set = 673 K in order to avoid structural relaxation of the metallic glass [18,19]. The surface composition and oxide layer thickness on as-spun and oxidized samples have been determined by X-ray photoemission spectroscopy (XPS) using a K-Alpha + XPS System, manufactured by ThermoFisher Scientific.…”

Section: Experimental Methods and Materials Preparationmentioning

confidence: 99%

Importance of surface oxide for the tribology of a Zr-based metallic glass

et al. 2017

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Thermally grown surface oxide layers dominate the single-asperity tribological behavior of a Zr 60 Cu 30 Al 10 glass. Increase in oxidation time leads to an increased contribution of shearing and a corresponding decreased contribution of ploughing to friction. This change in the dominating friction and wear mechanism results in an overall minor decrease of the friction coefficient of oxidized surfaces compared to the metallic glass sample with native surface oxide. Our results demonstrate the importance of creating a stable oxide layer for practical applications of metallic glasses in micro-devices involving sliding contact.

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“…8,9) It has been found that binary Cu-Zr alloys can form BMGs including nanocrystalline particles in a wide range of compositions, [10][11][12] among which Cu 50 Zr 50 has a small critical casting thickness below 2 mm. Considering that very high GFA is obtained in Zr-Cu-Al system, 13) it is possible to increase GFA of the Cu 50 Zr 50 alloy by addition of Al. Moreover, we also found that addition of Ag can improve the GFA of the Cu 50 Zr 50 alloy.…”

Section: Introductionmentioning

confidence: 99%