Characterization of hydrogen-induced structural changes in Zr-based bulk metallic glasses using positron annihilation spectroscopy

2012 ◽  
Vol 27 (20) ◽  
pp. 2587-2592 ◽  
Author(s):  
Fuyu Dong ◽  
Yanqing Su ◽  
Liangshun Luo ◽  
Jingjie Guo ◽  
Hengzhi Fu ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Metallic Glasses ◽  
Structural Changes ◽  
Bulk Metallic Glasses ◽  
Positron Annihilation Spectroscopy ◽  
Image Position

Abstract

scholarly journals Short Range Chemical Ordering in Bulk Metallic Glasses

2000 ◽  
Vol 644 ◽  
Author(s):  
P. A. Sterne ◽  
P. Asoka-Kumar ◽  
J. H. Hartley ◽  
R. H. Howell ◽  
T.G. Nieh ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Critical Density ◽  
Positron Annihilation Spectroscopy ◽  
Atomic Scale ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Chemical Ordering ◽  
Open Volume

AbstractWe provide direct experimental evidence for a non-random distribution of atomic constituents in Zr-based multi-component bulk metallic glasses using positron annihilation spectroscopy. The Ti content around the open-volume regions is significantly enhanced at the expense of Cu and Ni, indicating that Cu and Ni occupy most of the volume bounded by their neighboring atoms while Ti and Zr are less closely packed and more likely to be associated with open-volume regions. Temperature-dependent measurements indicate the presence of at least two different characteristic sizes for the open volume regions. Measurements on hydrogen- charged samples show that the larger open-volume regions can be filled by hydrogen up to a critical density. Beyond this critical density, local atomic-scale open-volume damage is created in the sample to accommodate additional hydrogen. The onset of this local damage in positron annihilation data coincides with the onset of volume expansion in X-ray diffraction data.

Characterization of ethylcellulose free films by positron annihilation spectroscopy and mechanical testing

2014 ◽  
Vol 115 ◽  
pp. 47-50 ◽  
Author(s):  
Diána Hegyesi ◽  
Károly Süvegh ◽  
András Kelemen ◽  
Klára Pintye-Hódi ◽  
Géza Regdon
Keyword(s):  
Positron Annihilation ◽  
Mechanical Testing ◽  
Positron Annihilation Spectroscopy ◽  
Free Films

scholarly journals Free-volume Characterization of Polysilanes Using Positron Annihilation Spectroscopy.

1999 ◽  
Vol 12 (5) ◽  
pp. 739-742
Author(s):  
Mutsumi Tashiro ◽  
Shu Seki ◽  
Pradeep K. Pujari ◽  
Yoshihide Honda ◽  
Seiichi Tagawa
Keyword(s):  
Positron Annihilation ◽  
Free Volume ◽  
Positron Annihilation Spectroscopy

scholarly journals Preparation and characterization of Fe-based bulk metallic glasses in plate form

2012 ◽  
Vol 407 (16) ◽  
pp. 3192-3195 ◽  
Author(s):  
G.C. Lavorato ◽  
G. Fiore ◽  
A. Castellero ◽  
M. Baricco ◽  
J.A. Moya
Keyword(s):  
Metallic Glasses ◽  
Bulk Metallic Glasses

Stability of shear banding process in bulk metallic glasses and composites

2017 ◽  
Vol 32 (13) ◽  
pp. 2560-2569 ◽  
Author(s):  
Yusheng Qin ◽  
Xiaoliang Han ◽  
Kaikai Song ◽  
Li Wang ◽  
Yun Cheng ◽  
...  
Keyword(s):  
Metallic Glasses ◽  
Shear Banding ◽  
Bulk Metallic Glasses ◽  
Image Position

Abstract

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