Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0022-3093(99)00140-4
Title: Glass formation in La-based La55Al25(NiCu)20 alloys by Bridgman solidification
Authors: Lu, Z.P. 
Li, Y. 
Ng, S.C. 
Feng, Y.P. 
Issue Date: 1-Aug-1999
Source: Lu, Z.P., Li, Y., Ng, S.C., Feng, Y.P. (1999-08-01). Glass formation in La-based La55Al25(NiCu)20 alloys by Bridgman solidification. Journal of Non-Crystalline Solids 250-252 : 601-604. ScholarBank@NUS Repository. https://doi.org/10.1016/S0022-3093(99)00140-4
Abstract: Five La-based La55Al25NixCu20-x (x = 0, 5, 10, 15, 20) alloys were subjected to Bridgman unidirectional solidification at growth velocities between 0.1 and 4.82 mm/s through a temperature gradient of 15 K/mm. The formation of the amorphous state of the resulting samples was confirmed by X-ray diffraction and differential scanning calorimetry. The critical cooling rates for glass formation in La55Al25Ni20, La55Al25Ni15Cu5, La55Al25Ni10Cu10, La55Al25Ni5Cu15 and La55Al25Cu20 were directly determined to be 67.5±6.8 K/s, 34.5±3.5 K/s, 22.5±2.2 K/s, 35.9±4.0 K/s and more than 72.3±8.0 K/s, respectively. With increasing Cu content the critical growth velocity shows a minimum phenomenon around 10 at.% Cu, indicating that the glass forming ability is the largest for the 10 at.% Cu containing alloy. The glass transition temperature (Tg) and the crystallization temperature (Tx) are independent of growth velocity for fully amorphous samples. The heat of crystallization (ΔHx) increased with increasing growth velocity.
Source Title: Journal of Non-Crystalline Solids
URI: http://scholarbank.nus.edu.sg/handle/10635/91490
ISSN: 00223093
DOI: 10.1016/S0022-3093(99)00140-4
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

3
checked on Mar 7, 2018

WEB OF SCIENCETM
Citations

1
checked on Mar 7, 2018

Page view(s)

40
checked on Apr 20, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.