Internal friction of hydrogen-doped Zr-based metallic glasses

In an attempt to develop high-strength, high-damping materials, internal friction measurements have been performed by the reed method at the frequency of 100-300 Hz from 80 K to 400 K for hydrogen doped metallic glasses of multicomponent Zr-based alloys from which one can produce bulk metallic glasses: a ternary Zr-Al-Cu, a quaternary Zr-Al-Ni-Cu, and quintuple Zr-Ti-Al-Ni-Cu and Zr-Ti-Cu-Ni-Be alloys. A very broad peak height increases and then decreases with increasing hydrogen concentration. The peak temperature decreases with increasing concentration of hydrogen. The peak temperature is lower for alloys of larger number of constituent elements. These results are discussed in terms of the distribution of hydrogen site in the amorphous structure. The largest internal friction at 300 K in Q(-1)=6x10(-3) which is not as large as those of commercial high damping materials.