Isothermal Evolution of Long Range Order in Bulk Metallic Glass Ni_<15>Pt_<60>P_<25> near Glass Transition : In-Situ SANS Measurement

概要

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In-situ measurements of small angle neutron scattering from a bulk metallic glass Ni_<15>Pt_<60>P_<25> were carried out in the momentum transfer range of 0.008 < Q < 0.08A^^1^<-1> as a function of the holding time during isothermal annealing at the temperature T_g=483 K just below the glass transition temperature Tg=488K. The small angle neutron scattering intensities initially increase with holding time and reach saturation values. The small angle neutron scattering intensity of the glass cooled down to room temperature after the annealing increases at the every momentum transfer value observed. The small angle neutron scattering intensities follow a Q^<-4> dependence and have no peak structure in the momentum transfer range observed. There is no evidence for any phase separations in nanometer length scale to occur in this glass.
理論物理学刊行会の論文
1997-06-27