Thermal Stability of Fe85.5B14.5 Metallic Glass

Authors : Ashfaq AHMAD, Asghari MAQSOOD

Pages : 661-665

View : 10 | Download : 3

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The thermal stability and crystallization behaviour of metallic glass Fe\insert ignore into journalissuearticles values( 85.5 \);B\insert ignore into journalissuearticles values( 14.5 \); were investigated by Dynamic Temperature Resistivity Measurement insert ignore into journalissuearticles values(DTRM); technique from room temperature to 1050K in forward and reverse mode at a heating rate of 40 K/hr. The slope of Resistivity-Temperature-Curve insert ignore into journalissuearticles values(RTC); changes sign and magnitude at the temperature where the transition takes place. Differential Thermal Analysis insert ignore into journalissuearticles values(DTA); was carried out at the heating rates of 10, 20, 30 \& 40 K/min. A comparison of the results of DTRM and DTA measurements shows that crystallization in this alloy is two-stage process. Activation energy for two crystallization steps was calculated from DTA data, using various peak shift equations. The activation energy for first step was found to be lower than the second.
Keywords : Turk J Phys, 24, 2000, , 661 665 Turk J Phys, vol 24, iss 5