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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 18    No. 1    January 2008

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Interfacial characteristics and dynamic mechanical properties of Wf/Zr-based metallic glass matrix composites
MA Wei-feng(马卫锋), KOU Hong-chao(寇宏超), CHEN Chun-sheng(陈春生), LI Jin-shan(李金山),HU Rui(胡 锐), XING Li-qian(刑力谦), ZHOU Lian(周 廉), FU Heng-zhi(傅恒志)

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

ISSN 1672-7029
CN 43-1423/U

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