A homogeneous distribution of ultrafine YAl2 particles in YAl2/Mg mixture was obtained by mix-milling method.The effect of milling on the microstructure of YAl2 particles and the dispersion of YAl2 particles in the mixture were investigated by scanning electron microscopy(SEM),energy dispersive X-ray(EDAX) and transmission electron microscope(TEM) techniques.The results show that with increasing milling time,YAl2 particle size decreases,and the amount of particle sharp corners is significantly reduced.After...