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Start Over Author "Ichitsubo, Tetsu" Publisher japan institute of metals
16 results on '"Ichitsubo, Tetsu"'

3. Crystallization Behavior and Structural Stability of Zr50Cu40Al10 Bulk Metallic Glass

Author

Zhang, Shuo, Ichitsubo, Tetsu, Yokoyama, Yoshihiko, Yamamoto, Tokujiro, Matsubara, Eiichiro, and Inoue, Akihisa

Subjects
rapid heating, zirconium-based BMGs, crystallization, long-range-diffusion, differential scanning calorimetry (DSC), structure, bulk metallic glasses, strain energy, field-emission scanning electron microscopy (FE-SEM), X-ray diffraction method
Abstract

We have investigated the origin of significantly high thermal stability of Zr50Cu40Al10 metallic glass and its crystallization behavior as compared to Zr70Cu20Al10 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) Zr50Cu40Al10 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.

Published
2009

4. Crystallization Behavior and Structural Stability of Zr50Cu40Al10 Bulk Metallic Glass

Author

40324826, 90173864, Zhang, Shuo, Ichitsubo, Tetsu, Yokoyama, Yoshihiko, Yamamoto, Tokujiro, Matsubara, Eiichiro, Inoue, Akihisa, 40324826, 90173864, Zhang, Shuo, Ichitsubo, Tetsu, Yokoyama, Yoshihiko, Yamamoto, Tokujiro, Matsubara, Eiichiro, and Inoue, Akihisa

Abstract

We have investigated the origin of significantly high thermal stability of Zr50Cu40Al10 metallic glass and its crystallization behavior as compared to Zr70Cu20Al10 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) Zr50Cu40Al10 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.

Published
2009

8. Materia Japan

Author

Tane, Masakazu, primary, Ichitsubo, Tetsu, additional, Hirao, Masahiko, additional, and Nakajima, Hideo, additional

Published
2007
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10. Atomizing Effect on Sn-Zn Based Solder Alloy

Author

Yamaguchi, Masahiko, primary, Ichitsubo, Tetsu, additional, Matsubara, Eiichiro, additional, Kimura, Hisamichi, additional, Sasamori, Kenichiro, additional, Irie, Hisao, additional, Kumamoto, Seishi, additional, and Anada, Takaaki, additional

Published
2006
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