Effect Of Mechanical Milling Research Articles

Magnetic hardening of mechanically milled Sm 2Fe 14Ga 3C 2

The effect of mechanical milling and annealing on the structure and magnetic properties of Sm 2Fe 14Ga 3C 2 has been studied. Milling was found to lead to the formation of an amorphous phase. Annealing at temperatures above 700 °C resulted in formation of nanocrystalline Sm 2Fe 14Ga 3C 2 phase having the Th 2Zn 17 structure and isotropic magnetic behaviour with coercivities of up to 13 kOe. It has been also shown that anisotropic powders with coercivities of 4–5 kOe can be prepared using low energy milling and subsequent heat treatment.

De-mixing of Nd2Fe14B during mechanical milling

The effect of mechanical milling on the structure of the Nd2Fe14B intermetallic has been investigated using x-ray diffraction and electron microscopy. The milling resulted in the decomposition of Nd2Fe14B into α-Fe and an amorphous phase. Attempts to mechanically alloy Fe and Nd powders resulted in a nanocrystalline mixture of the same two phases.