Glass-formation and crystallization processes in Ag–Y–Cu alloys

Investigation of glass-formation and crystallization processes of several alloys of Ag–Y–Cu system was conducted. The samples were produced by melt spinning and Cu-mold casting. The structure of ribbon samples was examined by X-ray diffractometry and transmission electron microscopy. Phase transform...

Full description

Saved in:
Bibliographic Details
Published in:Journal of non-crystalline solids 2012-08, Vol.358 (15), p.1759-1763
Main Authors: Ketov, S.V., Louzguina-Luzgina, L.V., Churyumov, A.Yu, Solonin, A.N., Miracle, D.B., Louzguine-Luzgin, D.V., Inoue, A.
Format: Article
Language:English
Subjects:
Ag–Y–Cu alloys
Alloys
Amorphous structure
CALORIMETRY
COPPER ALLOYS (40 TO 99.3 CU)
Crystallization
DIFFERENTIAL THERMAL ANALYSIS
Glass crystallization
Glass-formation
GLASSES
Melt spinning
Ribbons
SILVER ALLOYS (50 TO 99 AG)
Silver base alloys
SPINNING
THERMAL ANALYSIS
X RAYS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Investigation of glass-formation and crystallization processes of several alloys of Ag–Y–Cu system was conducted. The samples were produced by melt spinning and Cu-mold casting. The structure of ribbon samples was examined by X-ray diffractometry and transmission electron microscopy. Phase transformations were studied by differential scanning and isothermal calorimetry and differential thermal analysis. Despite the large difference in atomic radii between the components in the investigated system, even being produced by melt spinning technique at high cooling rate, only Ag61Y29Cu10 alloy with large supercooled liquid region was found to be X-ray amorphous. A principle for obtaining an alloy with high glass forming ability involving difference in atomic radii between the alloy components is considered. Efficient cluster packing model was also tested. ► Glass forming ability (GFA) of the alloys from Ag–Y–Cu system were investigated. ► Only Ag61Y29Cu10 alloy can be made fully amorphous even by melt spinning. ► Alloy with high GFA must have optimal difference between the components atomic radii.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2012.05.012