Sm Microalloyed Cu Zr Al Bulk Metallic Glasses

2016-09-26
Sıkan, Fatih
Kalay, İlkay
Kalay, Yunus Eren
The glass forming ability (GFA) and crystallization kinetics of rare earth (Sm) micro-alloyed Cu-Zr-Al based bulk metallic glasses were investigated using differential scanning calorimetry (DSC) under continuous heating conditions, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Under continuous heating conditions, the glass transition and crystallization temperatures were found to increase with increasing the isochronal heating rate. The activation energies for crystallization were calculated as 351.25 and 345.77 kJ/mol by means of Kissinger and Ozawa methods, respectively.
IMMC 2016

Suggestions

Efficient Ceria-Supported Rhodium Nanoparticles as an Electrocatalyst for Hydrogen Evolution
Akbayrak, Merve; Önal, Ahmet Muhtar (The Electrochemical Society, 2019-12-13)
Rh-0/CeO2 catalystwas prepared by the reduction of Rh+3 ions on CeO2 surface and characterized by transmission electron microscopy, inductively coupled plasma optical emission spectrometry, X-ray photoelectron spectroscopy and powder X-ray diffractometry techniques. To investigate its electrocatalytic activity for H-2 evolution reaction, a glassy carbon electrode (GCE) was modified with Rh-0/CeO2. The modified electrode was found to exhibit a high electrocatalytic activity (turnover frequency (TOF): 1.56 s(...
Nanocrystallization in Cu-Zr-Al-Sm Metallic Glasses
Sıkan, Fatih; Kalay, İlkay; Kalay, Yunus Eren (null; 2017-02-26)
Abstract The effect of rare-earth element (Sm) microalloying on the thermal stability and crystallization kinetics of melt-spun ribbons and suction-cast rods of Zr48Cu38.4Al9.6Sm4 alloy were investigated using differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT). The XRD results of constant heating rate annealing indicated that amorphous Zr48Cu38.4Al9.6Sm4 melt-spun ribbons devitrifies into Cu2Sm at 673 K (400 °C). The sequ...
Nanocrystallization in Cu-Zr-Al-Sm Bulk Metallic Glasses
Sıkan, Fatih; Yaşar, Bengisu; KALAY, İLKAY (Springer Science and Business Media LLC, 2018-04-01)
The effect of rare-earth element (Sm) microalloying on the thermal stability and crystallization kinetics of melt-spun ribbons and suction-cast rods of Zr48Cu38.4Al9.6Sm4 alloy were investigated using differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT). The XRD results of constant heating rate annealing indicated that amorphous Zr48Cu38.4Al9.6Sm4 melt-spun ribbons devitrifies into Cu2Sm at 673 K (400 A degrees C). The sequ...
Kinetics and Mechanisms of Isothermal Devitrification in Amorphous Cu50Zr50
Cullinan, Tim; Kalay, Ilkay; Kalay, Yunus Eren; Kramer, Matt; Napolitano, Ralph (2015-02-01)
The crystallization kinetics and microstructural dynamics associated with devitrifying a melt-spun Cu50Zr50 metallic glass were investigated using isothermal treatments, in situ high-energy synchrotron X-ray diffraction, conventional and high-resolution transmission electron microscopy, and differential scanning calorimetry. The analysis of isothermal transformations allows us to more clearly unravel the complex interplay between nucleation and growth of competing stable and metastable phases. The isotherma...
Kinetics of fcc-Al nanocrystallization in Al90Tb10 metallic glass
DEMIRTAS, T.; Kalay, Yunus Eren (Elsevier BV, 2013-10-15)
The crystallization kinetics of Al90Tb10 amorphous alloy were investigated by a combined study of differential scanning calorimetry (DSC), transmission electron microscopy (TEM), Cu-K alpha X-ray diffraction (XRD) analyses and microhardness measurements. Amorphous to fcc-Al transformation kinetics were descried through Johnson-Mehl-Avrami OMA) approach based on the isothermal DSC hold at 220 degrees C. XRD and TEM revealed the formation of highly populated (similar to 10(21) m(-3)) fcc-Al nanocrystals after...
Citation Formats
F. Sıkan, İ. Kalay, and Y. E. Kalay, “Sm Microalloyed Cu Zr Al Bulk Metallic Glasses,” presented at the IMMC 2016, İstanbul, Türkiye, 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/73601.