Articles
  • An upgrade recycling from Mg alloy chips toward superconducting MgB2 via powder processing
  • Makoto Nankoa,*, Daisuke Maruokaa, Hitoshi Ozawaa, Shigeharu Kamadoa, Hiroya Abeb, Akira Kondob and Makio Naitob
  • a Nagaoka University of Technology, Nagaoka, Niigata 940-2188, JAPAN b Joining & Welding Research Institute, Osaka University, Ibaraki, Osaka 567-0047, JAPAN
Abstract
A recycling process of Mg alloy chips to obtain superconducting MgB2 is proposed. In the present process, mechanical milling was used to mix and grind AZ31 chips and boron powder. Fine AZ31/boron powder mixture can be fabricated via a mechanical milling process. Mechanical milling can reduce the process time to synthesize MgB2 powder. An AZ31/boron mixture via mechanical milling can be reacted completely to MgB2 by heating at 700 oC for 3 h. Sintered MgB2 bodies produced by a pulsed electric current sintering technique showed approximately 30 K as the superconducting critical temperature.

Keywords: Magnesium alloys, AZ31, MgB2, Recycle, Powder Processing.

This Article

  • 2009; 10(6): 840-843

    Published on Dec 31, 2009