AVS 58th Annual International Symposium and Exhibition
    Nanometer-scale Science and Technology Division Tuesday Sessions
       Session NS-TuM

Paper NS-TuM1
Formation of Metallic Glass Nanofiber

Tuesday, November 1, 2011, 8:00 am, Room 203

Session: Nanowires and Nanoparticles II: Characterization and Synthesis
Presenter: Koji Nakayama, Tohoku University, Japan
Authors: K.S. Nakayama, Tohoku University, Japan
Y. Yokoyama, Tohoku University, Japan
T. Wada, Tohoku University, Japan
N. Chen, Tohoku University, Japan
Correspondent: Click to Email
Metallic glasses have been receiving significant attention because their superior mechanical properties are attractive to structural materials. However, far less attention paid to metallic glass nanostructures though they have exciting potential for catalysis applications due to the expanding of metallic surface area. Progress has been hindered by the lack of bottom-up methodologies to produce self-assembly nanostructures. Recently, we show that the instantaneous fracture process of a bulk metallic glass produces amorphous nanostructures [Nakayama et al., Nano Lett. 8, 516 (2008)] and the simple tensile draw under viscous deformation leads to the formation of individual amorphous nanowires [Nakayama et al., Adv. Mater. 22, 872 (2010)]. However, these approaches are unsuitable for massive production because the amount of nanowires is limited. In this talk, we first report an approach to the synthesis of metallic glass nanofibers that exploits a conventional gas atomization which is a central technique in powder metallurgy. We found that the nanofiber forming ability is closely related to the super liquid cooling region of the alloys and the atomizing gas pressure.