Viscosity-related properties of Mg65Cu25Y10 bulk metallic glass determined by uniaxial tension in the supercooled liquid region

Gun, B.; Laws, Kevin J.; Ferry, Michael

doi:10.1016/j.jallcom.2010.02.116

Cited by 9 publications

(4 citation statements)

References 43 publications

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“…The values of fragility parameters obtained from 'best-fits' of literature do not match so well, e.g. Vit 1 and Mg 65 Cu 25 Y 10 have been found to have comparable fragilities (23•8 and 21•8, respectively) according to literature (Mukherjee et al 2004;Gun et al 2010). However, in reality, the former is considered to be far better glass former (much higher cast section thickness) and it is significantly revealed in the present approach (table 1(a)) since it has much higher D value compared to the later alloy.…”

Section: Resultsmentioning

confidence: 91%

Relook on fitting of viscosity with undercooling of glassy liquids

2014

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The present approach is on the modification of viscosity fitting of undercooled liquid as a function of undercooling. The method consists of finding analytical solution of three arbitrary constants of the Vogel-Fulcher-Tamman (VFT) equation by choosing three viscosity data at three critical temperatures for an undercooled liquid. Three critical temperatures are liquidus temperature (T l), crystallization onset temperature (T x) and glass transition temperature (T g). The experimental viscosity data at or very near to these three critical temperatures (depending on the availability in literature) have been utilized to achieve the analytical solution. The analytical solution of VFT equation is further examined by selecting the experimental data points away from the critical temperatures in order to check their (T l , T x and T g) significance towards the solution. Total absolute error (TAE) and total squared error (TSE) values obtained from the present method with respect to the experimental viscosity data in the temperature range between T l and T g are very much comparable and in most of the cases lower than that of existing 'best-fit' cited in the literature for a number of glassy alloys. Moreover, this method interestingly enables us to find the fragility parameters for a number of glassy alloys and convincingly explain their true glass forming abilities (GFA).

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Section: Resultsmentioning

confidence: 91%

Relook on fitting of viscosity with undercooling of glassy liquids

2014

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“…These investigations were conducted on amorphous Mg 65 Cu 25 Y 10 obtained by different casting processes, namely, pressure die-casting [1,2,4], injection into a copper mold [6][7][8][9][10][11][12][13], injection into a water-cooled Cu mold [14], melt spinning [15][16][17][18][19][20], rapid quenching without listing the exact process [21,22] and permanent mold without stating anything about the mold [23]. The characterization techniques used in order to determine the amorphous structure of the Mg 65 Cu 25 Y 10 alloy included X-ray diffraction (XRD) [1,4,[6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], differential scanning calorimetry (DSC) [1, 2, 4, 6-8, 10-18, 22, 23] and transmission electron microscopy (TEM) [1,6,8,9,…”

Section: Introductionmentioning

confidence: 99%

Quantitative microstructure study of melt-spun Mg65Cu25Y10

2020

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Mg 65 Cu 25 Y 10 ribbons were produced by melt spinning. XRD, DSC, HRSEM and HRTEM were used to investigate their microstructure in its as-cast condition as well as after 3-and 6-minute exposures to 100 °C, 120 °C, 150 °C, 200 °C and 300 °C. XRD and DSC studies showed that the as-cast material had an amorphous character; the HRTEM investigation revealed that although the as-cast Mg 65 Cu 25 Y 10 is known to be one of the best glass formers, it is nano-crystalline rather than amorphous. The fraction of the crystalline phase after each treatment was calculated by means of quantitative analysis that took into account the degree of crystallinity of the as-cast material as revealed by HRTEM. The current study showed that quantitative analysis may lead to serious errors when relying on the absence of crystalline peaks in the XRD spectrum as if the material is completely amorphous. Moreover, it seems that HRTEM examination is essential for carrying out quantitative XRD and DSC analyses.

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“…The characterization techniques used in order to determine the amorphous structure of the Mg 65 Cu 25 Y 10 alloy included X-Ray Diffraction (XRD) [1,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], Differential Scanning Calorimetry (DSC) [1, 2, 4-6, 8-16, 18, 19], and Transmission Electron Microscopy (TEM) [1,4,6,7,11,14,16,17].…”

Section: Introductionmentioning

confidence: 99%

Microstructure characterization of melt spun Mg65Cu225Y10

Regev¹,

ESSEL²,

Katz‐Demyanetz³

2017

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Mg65Cu25Y10 ribbons were produced by melt spinning. Their microstructure was investigated in its as-cast condition, after pressing under 0.5 GPa for 5 min under different temperatures -RT, 50, 100, 150, and 200• C -and after five-minute exposure to the above temperatures without pressing. The microstructure was characterized by means of XRD, DSC, HRSEM, and HRTEM. XRD and DSC studies showed that the as-cast material had an amorphous character and that the material crystallized during exposure to temperature with or without applying stress. HRTEM revealed that the as-cast Mg65Cu25Y10, although known to be one of the best glass formers, is nano-crystalline rather than amorphous.K e y w o r d s : microstructure, melt spinning, metallic glass, Mg65Cu25Y10

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Viscosity-related properties of Mg65Cu25Y10 bulk metallic glass determined by uniaxial tension in the supercooled liquid region

Cited by 9 publications

References 43 publications

Relook on fitting of viscosity with undercooling of glassy liquids

Relook on fitting of viscosity with undercooling of glassy liquids

Quantitative microstructure study of melt-spun Mg65Cu25Y10

Microstructure characterization of melt spun Mg65Cu225Y10

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