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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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Munoz Chaves, Javier Andres
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Topics
Publications (6/6 displayed)
- 2024Characterization of Iron Oxide Nanotubes Obtained by Anodic Oxidation for Biomedical Applications—In Vitro Studiescitations
- 2017Effect of Rapid Solidification on Microstructure and Elastic Modulus of β Ti-x Nb-3Fe Alloys for Implant Applicationscitations
- 2016Surface Modification of the Alloy Ti-7.5Mo by Anodization for Biomedical Applicationscitations
- 2015Study on Cu<sub>48</sub>Zr<sub>43</sub>Al<sub>9</sub> and Cu<sub>54</sub>Zr<sub>40</sub>Al<sub>6</sub> Amorphous Matrix Alloys by Mechanical Spectroscopy
- 2011Mechanical Spectroscopy Study on Cu<sub>53.5</sub>Zr<sub>42</sub>Al<sub>4.5</sub> Alloy
- 2009Elastic Behavior of the Ti-13Nb-13Zr Alloy Obtained by Anelastic Spectroscopycitations
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article
Study on Cu<sub>48</sub>Zr<sub>43</sub>Al<sub>9</sub> and Cu<sub>54</sub>Zr<sub>40</sub>Al<sub>6</sub> Amorphous Matrix Alloys by Mechanical Spectroscopy
Abstract
<jats:p>Anelastic properties of Bulk Metallic Glasses (BMG) were studied by mechanical spectroscopy using a flexural vibration apparatus. BMG’s samples, with nominal composition Cu<jats:sub>48</jats:sub>Zr<jats:sub>43</jats:sub>Al<jats:sub>9</jats:sub>and Cu<jats:sub>54</jats:sub>Zr<jats:sub>40</jats:sub>Al<jats:sub>6</jats:sub>, were produced by skull push-pull casting technique in rectangular cavity cooper mold. In both samples, the differential scanning calorimeter patterns have evidenced the presence of amorphous structure, although the X-ray diffraction for Cu<jats:sub>48</jats:sub>Zr<jats:sub>43</jats:sub>Al<jats:sub>9</jats:sub>composition has shown a heterogeneous microstructure embedded in the amorphous matrix. Anelastic relaxation spectra were obtained using an acoustic elastometer system with vibration frequency in the kilohertz bandwidth, a heating rate of 1 K/min, vacuum greater than 10<jats:sup>-5</jats:sup>mBar in the temperature range of 300 K to 620 K. In the flexural apparatus, an acoustic elastometer system, the internal friction (energy loss) and the elastic modulus were obtained by free decay of vibrations and by the squared of the oscilation frequency, respectively. Internal friction spectra were not reproducible among the measurements, which may imply atomic rearrangement in the samples due to consecutive heating. Normalized elastic modulus data showed distinct behavior from the first to the other measurements evidencing irreversible microstructural alterations in the samples possibly associated with mechanical relaxation due to the motion of atoms or clusters in the glassy state.</jats:p>