Investigation on the reaction characteristics of a Zr-based metallic glass

Chuan Ting Wang

Abstract

Investigation on the reaction characteristics of a Zr-based metallic glass

The dynamic fragmentation and reaction behavior of
ZrCuNiAl bulk metallic glass (BMG) was investigated
by using of a quasi-sealed chamber. A series of impact
tests were conducted via launching ZrCuNiAl BMG
specimens into the test chamber filled with air or argon
(Ar). The results demonstrated that in air atmosphere the
ZrCuNiAl metallic glass experienced chemical reaction
after impacting the target, the energy released by such
reaction caused significant over-pressure inside the chamber.
The reaction was related to the fragmentation and
the critical fragment size for reaction was determined by
scanning electron microscope (SEM) images; In Ar atmosphere,
the fragment distribution of ZrCuNiAl BMG was
following a power-like function. A model was established
by combining the dynamic fracture distribution with
chemical reaction of ZrCuNiAl BMG can predict the
quasi-pressure inside the chamber under a certain range
of velocities with acceptable accuracy.