论文信息 - Influence of long milling time on the structure of FINEMET type powders

Influence of long milling time on the structure of FINEMET type powders

The aim of this work was to investigate the crystallographic structure, size distribution and chemical composition of FINEMET type powders after long milling (20 h up to 1800 h). Three different powder samples have been prepared and investigated: the first one by milling of amorphous ribbon with a chemical composition of Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 , the second by milling of the same ribbon but in a partially nanocrystalline state, and the third was prepared from powders of the pure elements of which FINEMET consists. Experimental results confirm that particle size distribution, crystallographic structure and chemical composition of the powders depend on all the investigated parameters: milling time and the character of the initial material before milling.

P. Kollár | P. Sovák | V. Kavecansky | P. Horňak | E. Fechová

[1] P. Petrovic,et al. Magnetic Properties of the FINEMET Type Powder Prepared by Long Time Milling , 2002 .

[2] P. Kollár,et al. The Magnetic Properties of Compacted Fe73.5Cu1Nb3Si13.5B9 Alloy in Amorphous and Nanocrystalline State , 2001 .

[3] P. Kollár,et al. The Structure and Magnetic Properties of Powder Finemet Materials , 2001 .

[4] J. Kováč,et al. The structure and magnetic properties of a powder FeCuNbSiB material , 2000 .

[5] A. Makino,et al. Improvement of soft magnetic properties of nanocrystalline FeMB (MZr and Nb) alloys and their applications , 1997 .

[6] A. Makino,et al. Nanocrystalline Soft Magnetic Fe–M–B (M=Zr, Hf, Nb) Alloys Produced by Crystallization of Amorphous Phase (Overview) , 1995 .

[7] G. Herzer,et al. Grain size dependence of coercivity and permeability in nanocrystalline ferromagnets , 1990, International Conference on Magnetics.