An unusual phase transformation during mechanical alloying of an Fe-based bulk metallic glass composition

Regular Cu-based amorphous alloy powder

“…However, the crystalline diffraction peaks again expose at the longer milling time above 245 h. These observations suggest that the powders go through crystalline-amorphous-crystalline transitions [24][25][26]. In addition, the position of the crystallization peaks varies with increasing of milling time, indicating the difference of the type and magnitude of the phases [27,28], and/or the relative thermodynamic stabilities of the different phase and phase combinations due to the introduction of mechanical energy into the system. Fig.…”

A Novel Approach to Develop Chalcogenide Glasses and Glass-Ceramics by Pulsed Current Electrical Sintering (PCES)

“…3). The ability to synthesize a dense material from amorphous powders obtained by mechanical-alloying has recently been demonstrated for many systems regarding metallic glasses (Yan et al, 2008, Patil et al, 2005& Kim et al, 2005. Also, amorphous powders in the systems Li 2 S-P 2 S 5 or AgI-As 2 Se 3 have been synthesized using the same method for solid electrolyte applications (Hayashi et al, 2001, Sekine et al, 2007& Trevey et al, 2009.…”

Influence of milling time on microstructure and magnetic properties of Fe80P11C9 alloy produced by mechanical alloying

“…It is obvious that the ball milling of the powders beyond 90 h gives rise to formation of small amount of Fe 2 P nanocrystals, as a result of mechanically-induced crystallization. The mechanically-induced crystallization and the formation of different phases including solid solutions and intermetallic compounds has been observed for other mechanically alloyed Fe-based amorphous powders [24,37]. It has been demonstrated that the temperature rise upon milling, powder contamination, introduction of mechanical energy and the corresponding variations in the thermodynamic stabilities of the different competing phases are the main causes of mechanical crystallization [13,24].…”