112 Prokt. Met. Sonderband 47 (2015) 
Der ı 
ganel 
1. Ein 
eit 02 
Arbet 
GFal¢ 
Fig. 3: The morphology of the centrifugally atomized NdFeB flake at wheel speed of 280 rpm; SEM micrograph, oo 
polished cross section 
1. nb 
+ ee : Der A 
7 Abd 
Sampi. 3 Yann 
3 AU: 
mple 2 BD AN 
Sample 1 ) 
600 1400 1200 -1000 es -600 -400 -200 
Fig. 4: B-H curves for samples 1 to 3 
4. CONCLUSIONS 
Centrifugal atomization technique enables at optimal processing parameters (wheel speed, melting 
time) production of NdFeB flakes with optimal microstructure consisting of fine and columnar 
grains of main Nd,Fe 4B phase separated by the Nd-rich phase dispersed uniformly along the main 
phase which is strongly desirable for preparation of high performance magnets with high 
coercivelv 
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