Original scientific paper

Microstructure evolution and thermal stability of rapidly solidified Al-Ni-Co-RE alloy

B. Karpe ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
A. Nagode ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
B. Kosec ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
A. Stoić ; University of Applied Sciences, Slavonski Brod, Croatia
M. Dolenec ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia
M. Bizjak ; Faculty of Natural Sciences and Engineering, University of Ljubljana, Ljubljana, Slovenia

Abstract

In the frame of this work, Al-5Ni-1Co-3RE (RE-Rare Earth (Mischmetal)) rapidly solidified ribbons were manufactured and analyzed. The morphology of the as-cast structure, as well as the microstructural features were analyzed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Thermal stability has been investigated by combination of four point scanning electrical resistivity measurement (ER), differential scanning calorimetry (DSC) and microhardness measurement. From the results we can conclude, that Al-5Ni-1Co-3RE rapidly solidified alloys have good thermal stability due to very slow coarsening kinetics of precipitated particles.

Keywords

rapid solidification; metallic materials; heat transfer; precipitation; electrical resistivity measurement

Hrčak ID:

95676

URI

https://hrcak.srce.hr/95676

Publication date:

1.7.2013.

Visits: 1.428 *