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Figure 1
Arc-melt type melt extraction equipment [5]
Figure 2
Ni-free Zr-based metallic glass wire prepared by melt-extraction method [5]
Amorphous alloys are known to exhibit superior mechanical properties such as high tensile strength and large elastic elongation limit of approximately 2%. In order to effectively utilize their superior strength, it is preferable to prepare wire-shaped samples of metallic glasses with a circular cross section and a highly smooth surface without any roughness (such as that of a mirror). The melt-extraction method without any cooling medium [1,2] is expected to yield novel metallic glass wires that cannot be obtained by the in-rotating-liquid melt spinning method [3]. Newly developed Arc-melt type melt extraction method [4-6] is the promissing technique for realizing the preparation of metallic glass wire in high reactivity and/or high melting temperature alloys such as Zr-, Ti-, Ni-based alloys and so on.
REFERENCES
[1] P. Rudkowski, G. Rudkowska, J.O. Strom-Olsen, Mater. Sci. Eng. A 133 (1991) 158-161.
[2] J.O. Strom-Olsen, Fine Fibres by Melt Extraction, Mater. Sci. Eng. A 178 (1994) 239-243.
[3] I. Ohnaka, T. Fukusako, T. Ohmichi, J. Jpn. Inst. Met. 45 (1981) 751-758.
[4] H. Kimura, A. Inoue, K. Sasamori, H. Ohtsubo, Y. Waku, J. Jpn. Soc. of Powder and Powder Metallurgy 47 (1999) 427-432.
[5] T. Nagase, K. Kinoshita, Y. Umakoshi, Mater. Trans. 49 (2008) 1385-1394., http://www.jim.or.jp/journal/e/49/06/1385.html
[6] T. Nagase, M. Ueda and Y. Umakoshi: J. of alloys and compounds, 485, 304-312 (2009)., http://dx.doi.org/10.1016/j.jallcom.2009.05.122
