Vol. 39, Issue 4, pp. 761-764

  1. Archive
  2. Optica Applicata Vol. 39, Issue 4, pp. 761-764 (2009)
Vol. 39 Issue 4 pp. 761-764

The evolution of microstructure in annealed LaFeSi-type alloys

Piotr Gebara, Piotr Pawlik, Edyta Kulej, Jerzy J. Wyslocki, Katarzyna Pawlik, Anna Przybyl

Keywords

microstructure, magnetocaloric materials, X-ray diffraction

Abstract

The evolution of microstructure and the phase constitution of the LaFe11.0Co0.8(Si0.4Al0.6)1.2 alloy in as-cast state and after subsequent annealing at 1323 K for 10, 20, 49 days was studied. In the LaFe11.0Co0.8(Si0.4 Al0.6)1.2 alloy after arc-melting, the dominant dendritic α-Fe phase crystallizes, which is confirmed by X-ray diffraction. Annealing of the samples resulted in evolution of microstructure and the phase constitution. Prolonged annealing of the samples causes almost full homogenization of the alloy with the single-phase structure identified as La(Fe0.85Co0.06Si0.04Al0.05)13 phase of the NaZn13-type structure.

Vol. 39
Issue 4
pp. 761-764

1.17 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology