scholarly journals Changes in the crystallization sequence upon sulfur addition in the Zr52.5Cu17.9Ni14.6Al10Ti5 bulk metallic glass-forming liquid revealed by in situ high-energy x-ray diffraction

2021 ◽  
Vol 5 (10) ◽  
Author(s):  
Benedikt Bochtler ◽  
Jessica Marcela Mariño-Salguero ◽  
Alexander Kuball ◽  
Oliver Gross ◽  
Fan Yang ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
High Energy ◽  
X Ray Diffraction ◽  
Crystallization Sequence ◽  
X Ray ◽  
Glass Forming ◽  
Sulfur Addition

In situ high-energy x-ray diffraction observation of structural evolution in a Ti-based bulk metallic glass upon heating

2010 ◽  
Vol 25 (12) ◽  
pp. 2271-2277 ◽  
Author(s):  
N. Zheng ◽  
G. Wang ◽  
L.C. Zhang ◽  
M. Calin ◽  
M. Stoica ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Free Volume ◽  
Structural Relaxation ◽  
Structural Evolution ◽  
High Energy ◽  
Rapid Quenching ◽  
X Ray Diffraction ◽  
X Ray

The structural evolution of the Ti40Zr10Cu34Pd14Sn2 bulk metallic glass (BMG) upon was investigated by means of in situ high-energy x-ray diffraction. The position, width, and intensity of the first peak in diffraction patterns are fitted through Voigt function below 800 K. All the peak position, width, and intensity values show a nearly linear increase with the increasing temperature to the onset temperature of structural relaxation, Tr = 510 K. However, these values start to deviate from the linear behavior between Tr and Tg (the glass transition temperature). The changes in free volume and the coefficient of volume thermal expansion prove that the aforementioned phenomenon is closely related to the structural relaxation releasing excess free volume arrested during rapid quenching of the BMG. Above 800 K, three crystallization events are detected and the first exothermic event is due to the formation of metastable nanocrystals.

scholarly journals High-Energy X-ray Diffraction Study of Liquid Structure of Metallic Glass-Forming Zr70Cu30 Alloy

2005 ◽  
Vol 46 (12) ◽  
pp. 2799-2802 ◽  
Author(s):  
Akitoshi Mizuno ◽  
Seiichi Matsumura ◽  
Masahito Watanabe ◽  
Shinji Kohara ◽  
Masaki Takata
Keyword(s):  
Metallic Glass ◽  
Diffraction Study ◽  
Liquid Structure ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Forming

Nucleation and growth in bulk metallic glass under high pressure investigated using in situ x-ray diffraction

2003 ◽  
Vol 83 (25) ◽  
pp. 5202-5204 ◽  
Author(s):  
W. H. Wang ◽  
P. Wen ◽  
D. Q. Zhao ◽  
M. X. Pan ◽  
T. Okada ◽  
...  
Keyword(s):  
High Pressure ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Nucleation And Growth ◽  
X Ray Diffraction ◽  
X Ray

Solidification of Bulk Metallic Glass-forming Alloys Observed by Time-resolved X-ray Diffraction Combined with Levitation Technique

2008 ◽  
Author(s):  
Toshihiko Akimoto ◽  
Akitoshi Mizuno ◽  
Masahito Watanabe ◽  
Yoshihiko Yokoyama ◽  
Shinji Kohara ◽  
...  
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Glass Forming

In Situ Observation of Solidification of Bulk Metallic Glass Forming Alloys from Supercooled Liquid by Using High Energy X-Ray Diffraction Combined with Levitation Techniques

2010 ◽  
Vol 638-642 ◽  
pp. 1677-1682 ◽  
Author(s):  
Masahito Watanabe ◽  
Akitoshi Mizuno ◽  
Toshihiko Akimoto ◽  
Shinji Kohara
Keyword(s):  
Liquid State ◽  
Supercooled Liquid ◽  
High Energy ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
Phase Selection ◽  
X Ray ◽  
Glass Forming ◽  
Supercooled Liquid State

It is well known that multi-component alloys form bulk metallic glasses (BMGs) from the supercooled liquid state without rapid quenching. However, the mechanism of phase selection between crystal and glass states has not been fully clarified. To obtain an insight into the glass-forming processes, we carried out in-situ observation on the solidification of Zr-based BMG-forming alloys from its supercooled liquids by time-resolved X-ray diffraction combined with the conical nozzle levitation (CNL) technique to achieve a containerless melting. For Zr-based alloys, we succeeded in detecting the X-ray diffraction patterns during glass formation from the supercooled liquid state as well as the crystallization from the liquid state. Furthermore we performed the precise structure analysis of supercooled state of Zr-based binary liquids. Based on the liquid structure and in-situ observation results, we discussed about the phase selection mechanism between crystal and glass states.

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