Interfacial characteristics and dynamic mechanical properties of Wf/Zr-based metallic glass matrix composites
(State Key Laboratory of Solidification Processing, Northwestern Polytechnical University,Xi’an 710072, China)
Abstract: Tungsten fiber reinforced Zr41.25Ti13.75Cu12.5Ni10Be22.5 metallic glass matrix composites were fabricated by means of melt infiltration casting. Their dynamic compressive tests were performed using a Hopkinson bar. The relationship between the interfacial characteristics and the dynamic compressive behavior was investigated. The results indicate that the interface characteristics of composites include interfacial diffusion and interfacial reaction, and the interfacial shear strength increases when the interfacial reaction is serious. The dynamic plastic performance are improved obviously if the suitable interface reaction occurs. The failure occurs by shear and the fibers split longitudinally if there is no interface reaction or a little reaction; in contrast, holistic failure occurs if there is too much interface reaction.
Key words: metallic glasses; push-out method; dynamic mechanical properties; interface reaction