TY - JOUR
T1 - Crystallization behavior and structural stability of Zr50Cu 40Al10 bulk metallic glass
AU - Zhang, Shuo
AU - Ichitsubo, Tetsu
AU - Yokoyama, Yoshihiko
AU - Yamamoto, Tokujiro
AU - Matsubara, Eiichiro
AU - Inoue, Akihisa
PY - 2009/6
Y1 - 2009/6
N2 - We have investigated the origin of significantly high thermal stability of Zr50Cu40Al10 metallic glass and its crystallization behavior as compared to Zr70Cu20Al 10 and Zr70Cu30 glassy alloys, by differential scanning calorimetry (DSC), x-ray diffraction (XRD) and resonant ultrasound spectroscopy (RUS) techniques. It was found from XRD and DSC analyses that (i) constituent atoms in Zr50Cu40Al10 are highly close-packed in a glassy state and (ii) Zr50Cu40Al 10 glass shows a complicated crystallization process when it is heated at conventional heating rates, but when it is rapidly heated, the ordered B2-type ZrCu is dominantly formed. The high thermal stability and its crystallization behavior are discussed in terms of the long-range-diffusion of atoms and elastic strain energy.
AB - We have investigated the origin of significantly high thermal stability of Zr50Cu40Al10 metallic glass and its crystallization behavior as compared to Zr70Cu20Al 10 and Zr70Cu30 glassy alloys, by differential scanning calorimetry (DSC), x-ray diffraction (XRD) and resonant ultrasound spectroscopy (RUS) techniques. It was found from XRD and DSC analyses that (i) constituent atoms in Zr50Cu40Al10 are highly close-packed in a glassy state and (ii) Zr50Cu40Al 10 glass shows a complicated crystallization process when it is heated at conventional heating rates, but when it is rapidly heated, the ordered B2-type ZrCu is dominantly formed. The high thermal stability and its crystallization behavior are discussed in terms of the long-range-diffusion of atoms and elastic strain energy.
KW - Bulk metallic glasses
KW - Crystallization
KW - Differential scanning calorimetry (DSC)
KW - Field-emission scanning electron microscopy (FE-SEM)
KW - Long-range-diffusion
KW - Rapid heating
KW - Strain energy
KW - Structure
KW - X-ray diffraction method
KW - Zirconium-based BMGs
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U2 - 10.2320/matertrans.MBW200833
DO - 10.2320/matertrans.MBW200833
M3 - Article
AN - SCOPUS:68149128473
VL - 50
SP - 1340
EP - 1345
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 6
ER -