Zinc alloy and preparation method therefor

    公开(公告)号:US10280484B2

    公开(公告)日:2019-05-07

    申请号:US14443975

    申请日:2013-11-19

    Inventor: Shae K. Kim

    Abstract: The present invention provides a zinc alloy with improved alloy characteristics such as fluidity, castability, mechanical properties, corrosion resistance and elongation, and a preparation method therefor. The method for preparing the zinc alloy, according to one aspect of the present invention, comprising the steps of: providing zinc and a magnesium master alloy including a calcium-based compound; and forming a molten metal in which the magnesium master alloy and the zinc are melted; and casting the molten metal. The zinc alloy, according to another aspect of the present invention, includes a zinc base and the calcium-based compound present in the zinc base, wherein magnesium is applied to the zinc base.

    Apparatus for driving three-dimensional microgravity cable

    公开(公告)号:US10214304B2

    公开(公告)日:2019-02-26

    申请号:US15575402

    申请日:2015-12-09

    Abstract: The technical objective of the present disclosure is to provide an apparatus for driving a three-dimensional microgravity cable that can reproduce microgravity environments such as those experienced on the moon or Mars. To this end, the apparatus for driving a three-dimensional microgravity cable of the present disclosure comprises: a frame unit for forming a virtual space; a wire unit comprising three or more wires, provided at the frame unit; a winch unit for winding or unwinding each of the three or more wires; tension measuring units, respectively provided at the three or more wires, for measuring the tensions of the respective wires; a position sensing unit, provided at the frame unit, for sensing the position of a participant; and a support unit, positioned in the virtual space, for supporting the participant by the three or more wires.

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