| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Chen, Zhuo
Erich Schmid Institute of Materials Science
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2024Structural Characterization of La0.6Sr0.4CoO3-δ Thin Films Grown on (100)-, (110)-, and (111)-Oriented La0.95Sr0.05Ga0.95Mg0.05O3-δ
- 2024Experimental study and numerical simulation of adhesively bonded timber-concrete composite panels: bending behavior, adhesive shear and peel stress distributionscitations
- 2023Bending behavior and bond analysis on adhesively bonded glulam-concrete panels fabricated with wet bonding techniquecitations
- 2023Large mechanical properties enhancement in ceramics through vacancy-mediated unit cell disturbancecitations
- 2023Enhancing Organic Semiconductor Molecular Packing Using Perovskite Interfaces to Improve Singlet Fissioncitations
- 2023Short-range order patterns in Mg66Zn29Ca5 metallic glasscitations
- 2022Atomistic mechanisms underlying plasticity and crack growth in ceramics : a case study of AlN/TiN superlatticescitations
- 2022Surmounting the thermal processing limitscitations
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article
Short-range order patterns in Mg66Zn29Ca5 metallic glass
Abstract
<p>Thanks to outstanding mechanical and chemical properties, metallic glasses have been recently alluring for biomedical applications. However, inadequate knowledge of atomic rearrangements as well as kinetics and mechanisms of crystallization prevents further microstructure improvement controlling the properties. In this work, we reveal that hierarchical transformations happen during the crystallization of Mg<sub>66</sub>Zn<sub>29</sub>Ca<sub>5</sub> metallic glass ribbons which were investigated using differential scanning calorimetry (DSC), electron microscopy (SEM and TEM), and X-ray diffraction (XRD). The activation energies corresponding to the crystallization of the glassy ribbons were evaluated by different thermodynamic models, i.e., Kissinger, and Augis and Bennett analysis. Our findings prove the formation of short-range order patterns in Mg<sub>66</sub>Zn<sub>29</sub>Ca<sub>5</sub> metallic glass with a unit size of ∼ 0.247 nm. Furthermore, the applied heating rate affects the glass transformation only slightly but accelerates the growth process quickly. The phase transformations occurring in annealed samples were studied by XRD, proving that crystallization starts with the formation of α-Mg + metastable Mg<sub>51</sub>Zn<sub>20</sub>. The metastable Mg<sub>51</sub>Zn<sub>20</sub> gradually transfers to Mg<sub>7</sub>Zn<sub>3</sub> with increasing temperature, and also Ca<sub>2</sub>Mg<sub>5</sub>Zn<sub>13</sub> precipitates. Close to the end of crystallization, Ca<sub>2</sub>Mg<sub>6</sub>Zn<sub>3</sub> precipitates by consuming Ca<sub>2</sub>Mg<sub>5</sub>Zn<sub>13</sub>. The Johnson–Mehl–Avrami–Kolmogorov (JMAK) model was employed to obtain the Avrami exponent of the crystallization reaction. The average slope of the Avrami plots is close to 2, indicating that crystallization progresses with diffusional growth and decreasing nucleation rate.</p>