The effect of Sn addition on the crystallization and thermal stability of Cu–Zr–Ti metallic glasses

Journal of Alloys and Compounds This paper describes the effect of Sn addition on the thermal and structural behaviour of (Cu60Zr25Ti15)100−xSnx (x=0, 1, 2, 3 and 4) alloys.


Expansion of the amorphous phase causing larger inter-atomic distances is observed with increasing Sn content. The glass transition temperature (Tg) and the onset of the first crystallization temperature (Tx) shifts to higher temperatures for alloys with increased Sn content. These, together with the increase in the activation energy of the 1st crystallization peak obtained from Kissinger analysis indicate the enhanced thermal stability of the alloys with increasing Sn content. Sn addition also widened super cooled liquid region of the alloys. TEM and XRD studies show nucleation of nano crystals associated with the first exothermic events. The size of the nano crystals increased from 6 to 20 nm when the Sn content varied from 0 to 4 at.%. A plausible explanation is invoked for the increase in the size of nano crystals with increase in Sn content. Irrespective of the Sn content all the alloys transform to Cu51Zr14 crystalline phase after the second exothermic peak.

Glass transition temperature of the alloys varies with heating rate following Lasocka’s relationship; using the relationship, the theoretical limits of the low temperature range of the glass transformation region, i.e. for the heating rate β = 1, of these alloys are also estimated.


Journal of Alloys and Compounds
Volume 537, 5 October 2012, Pages 275–279
The effect of Sn addition on the crystallization and thermal stability of Cu–Zr–Ti metallic glasses
Ansu J. Kailath, , Soumen Mandal
CSIR-National Metallurgical Laboratory, Jamshedpur 831007, India
Received 1 November 2011. Revised 11 April 2012. Accepted 12 April 2012. Available online 7 May 2012.

Hydrogen generation through rolling using Al-Sn alloy

Scopus: Mechanically treated aluminum-tin (Al-Sn) alloy, a novel hydrogen-generating material, was fabricated and found to react directly and immediately with water at room temperature.

The maximum yield of hydrogen per unit volume of alloy was 2259 mL/cm 3 (0.202 g/cm 3). The mass ratio of the generated hydrogen and the Al-Sn alloy material was 4.86%. This percentage is much higher than that of traditional hydrogen storage alloys and can compete with metal hydrides. The combination of Al-Sn alloy powder and carbon nanotubes (CNTs) produced a new kind of Al-Sn/CNT composite that also reacts with water at room temperature. Al-Sn/CNT composites were synthesized using a high temperature and high-pressure method. When CNT content was held constant, composites with single-walled CNTs had higher reaction rates than those with multi-walled CNTs. The effects of mechanical treatment and CNT addition on enhancing the reaction between Al-Sn alloys or Al-Sn/CNTs and water were also analysed


International Journal of Hydrogen Energy
Volume 37, Issue 15, August 2012, Pages 11012-11020
Hydrogen generation through rolling using Al-Sn alloy
Hu, X.a, Zhu, G.a, Zhang, Y.abc , Wang, Y.a, Gu, M.a, Yang, S.a, Song, P.a, Li, X.a, Fang, H.b, Jiang, G.c, Wang, Z.c  
a  Department of Physics, Laboratory of Materials Physics, Zhengzhou University, No. 75, Daxue Road, Zhengzhou 450052, China
b  Henan SF Diamond Co, Ltd., Zhengzhou 450016, China
c  School of Materials Science and Engineering, Central-south University, Changsha 410083, China