Chemical Short-Range Structure of Ti-Ni-X (X=V, Cu) Amorphous Alloys

概要

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The chemical short range order in an amorphous alloy system can be skillfully extracted from the neutron diffraction data, provided that an average neutron scattering amplitude <b> can be reduced to zero. In the present experiment, a series of Ti-Ni-X (X=V, Cu) systems are designed by taking an advantage of the fact that the values of <b> for Ti_<0.76>Ni_<0.24>, Ti_<0.7>Cu_<0.3> alloys and V are almost zero. Amorphous samples were synthesized by mechanical alloying. The Warren chemical short-range order parameter can be deduced from the radial concentration function. An increase in V concentration in the Ti-Ni-V amorphous alloys promotes the chemical short range order. In contrast, a decrease of the chemical short range order was found in the Ti-Ni-Cu amorphous alloys with increasing Cu concentration.Chemical short range orderstructutrezero scattering alloyneutron scattering
東北大学の論文
1996-03-28