Preparing Amorphous/Nanocrystalline TiNbZrTaFe Powder by Mechanical Alloying

(Ti69.7Nb23.7Zr4.9Ta1.7)100-xFex (x=0, 2, 6, and 10) nanocrystalline, nanocomposite 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 (△Tx =122 K). For x=2 and 6, residual nanocrystals of the β-Ti structure dispersed in the amorphous matrix. For x=0, the milled powder has full nanocrystalline structure. These as-milled powders offer the potential to fabricating the bulk glass material or nanocrystal/glass matrix composites by powder metallurgy for biomedical use.