Preparing Amorphousanocrystalline TiNbZrTaFe Powder by Mechanical Alloying

摘要

(Ti_(69.7)Nb_(23.7)Zr_(4.9)Ta_(1.7))_(100-x)Fe_x (x=0, 2, 6, and 10) nano-crystalline, nano-composite and amorphous powders were synthesized by mechanical alloying from blended element powder. The structural transition for the milled powders was confirmed by X-ray diffraction (XRD). Results shows with the increasing Fe content in alloy system, the glass forming ability become larger. Only for x=10, it can obtain nearly completely amorphous structure with wide super cooled liquid region (△T_x =122 K). For x=2 and 6, residual nano-crystals of the p-Ti structure dispersed in the amorphous matrix. For x=0, the milled powder has full nano-crystalline structure. These as-milled powders offer the potential to fabricating the bulk glass material or nano-crystal/glass matrix composites by powder metallurgy for biomedical use.