Enhanced Plasticity of Cu-Zr-Ti Bulk Metallic Glass and Its Correlation with Fragility

Mandal, Soumen; Kailath, Ansu J.

doi:10.1007/s11661-018-4980-x

Cited by 19 publications

(8 citation statements)

References 49 publications

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“…In contrast, the 1 mm sample also exhibited lower value of elastic modulus (88.0 ± 0.5 GPa) than the 2 mm (93.2 ± 0.4 GPa ) and 3 mm (93.7 ± 0.5 GPa) samples. The modulus of the amorphous phase was lower compared with the crystalline one [2,3]. The results suggest that the 3 mm sample had the largest number of crystalline fraction, which is consistent with the DSC results obtained in this study.…”

Section: Resultssupporting

confidence: 90%

“…Due to their high strength, low elastic modulus, and good wear resistance, bulk metallic glasses (BMGs) have gained significant attention for practical applications. However, the inadequate plastic deformation of BMGs at room temperature limits their practical applications [1][2][3][4]. In recent years, various efforts have been made to overcome this limitation.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Sample-Size on the Compression Deformation Behavior of a CuZr-Based Bulk Metallic Glass Composite

Chen

Liang

Wang

et al. 2020

Metals

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The compressive deformation behaviors and microstructures of Cu45Zr48Al4Nb3 bulk metallic glass composites with diameters of 3, 2, and 1 mm were investigated systematically. It was found that the smallest sample showed the highest yield strength and compressive plasticity. The yield strength of the samples was found to depend on the fraction of their crystalline phases in the glassy matrix. The smaller samples showed larger free volumes, which is favorable for plastic deformation. The deformation behavior of the samples was found to depend on their size. The results obtained in this study will be helpful for investigating the mechanical behavior of metallic glass composites.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Effect of Sample-Size on the Compression Deformation Behavior of a CuZr-Based Bulk Metallic Glass Composite

Chen

Liang

Wang

et al. 2020

Metals

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“…The lack of long-range order in the atomic assembly makes the bulk metallic glasses (BMGs) unique with the combination of properties viz. high strength, low elastic modulus, large elasticity, high fracture toughness and exceptional corrosion resistance [1][2][3][4][5][6][7][8][9] . Therefore, BMGs are considered to be promising structural materials in different engineering fields 10 .…”

Section: Activation Energy (E a ) And Avrami Exponential Factor (N) Hmentioning

confidence: 99%

Isothermal crystallization kinetics of (Cu60Zr25Ti15)99.3Nb0.7 bulk metallic glass

Mandal

Lee

Park

2020

Sci Rep

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This paper reports the crystallization kinetics of (Cu60Zr25Ti15)99.3Nb0.7 bulk metallic glass under isothermal conditions. Differential scanning calorimetry (DSC) has been employed for isothermal annealing at ten different temperatures prior to the onset of crystallization (To) temperature. X-ray diffraction and transmission electron microscopy have been used to confirm the amorphous structure of the as cast sample. Crystallized volume fractions (x) are calculated from the exothermic peaks of DSC scans. Crystallized volume fractions (x) against time show sigmoidal type of curves as well as the curves become steeper at higher annealing temperatures. Continuous heating transformation diagram has been simulated to understand the stability of the bulk metallic glass. Crystallization kinetics parameters are calculated using Arrhenius and Johnson–Mehl–Avrami equations. Activation energy (Ea) and Avrami exponential factor (n) have exhibited strong correlation with crystallized volume fraction (x). The average activation energy for isothermal crystallization is found to be 330 ± 30 kJ/mol by Arrhenius equation. Nucleation activation energy (Enucleation) is found to be higher than that of growth activation energy (Egrowth). The Avrami exponential factor (n) indicates about the diffusion controlled mechanism of the nucleation and three-dimensional growth.

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“…4 b) which is attributed to the decrease in crystallinity and increase in amorphousity. SiO 2 is amorphous in nature thus, there are hump and broadening 53 in peaks observed from 2θ = 19° to 25° (Fig. 4 b–g) which confirms the presence of amorphous SiO 2 52 .…”

Section: Resultsmentioning

confidence: 55%

Microencapsulation of stearic acid with SiO2 shell as phase change material for potential energy storage

Ishak

Mandal

Lee

et al. 2020

Sci Rep

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Stearic acid (SA) is being used as phase change material (PCM) in energy storage applications. In the present study, the microencapsulation of SA with SiO2 shell was carried out by sol–gel method. Different amounts of SA (5, 10, 15, 20, 30 and 50 g) were taken against 10 ml of tetraethyl orthosilicate (TEOS) for encapsulation. The synthesized microencapsulated PCM (MEPCM) were characterized by Fourier transform infrared spectroscope (FT-IR), X-Ray diffraction (XRD), X-Ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The characterization results showed that SA was successfully encapsulated by SiO2. Thermogravimetric analysis (TGA) exhibited better thermal stability of the MEPCM than SA. The enthalpy values of MEPCM were found to be unchanged even after 30 heating–cooling cycles by differential scanning calorimetry (DSC). The latent heats of melting and solidification of 50 g SA containing MEPCM were found to be highest i.e. 182.53 J/g and 160.12 J/g, respectively among all microencapsulated samples. The encapsulation efficiency values were calculated using thermal data and the efficiency was found to be highest i.e. 86.68% in the same sample.

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Enhanced Plasticity of Cu-Zr-Ti Bulk Metallic Glass and Its Correlation with Fragility

Cited by 19 publications

References 49 publications

Effect of Sample-Size on the Compression Deformation Behavior of a CuZr-Based Bulk Metallic Glass Composite

Effect of Sample-Size on the Compression Deformation Behavior of a CuZr-Based Bulk Metallic Glass Composite

Isothermal crystallization kinetics of (Cu60Zr25Ti15)99.3Nb0.7 bulk metallic glass

Microencapsulation of stearic acid with SiO2 shell as phase change material for potential energy storage

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