Influence of Nb on the Interface Structure of Tungsten Fiber Reinforced Zr-Based Bulk Metallic Glass Composites

Abstract:

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Zr-based metallic-glass matrix composites, which are reinforced by continuous tungsten fibers, were prepared by melt infiltration casting. The interface structure was analyzed by using X-Ray diffraction, SEM and EPMA. The results illustrate that for the Zr55Al10Ni5Cu30 matrix composite, in addition to the interface diffusion, an interface eutectoid reaction between W fiber and Zr in the liquid state takes place and forms W5Zr3 phase at the interface during casting, the interface is included in Class Ⅲ system; but for (Zr55Al10Ni5Cu30)0.98Nb2 and Zr57Al10Ni12.6Cu15.4Nb5 matrix composite, the addition of Nb restrains the interface eutectoid reaction effectively, which may be attributed to reducing diffusion coefficient of Zr through the interface, and there is only a thinner diffusion layer at the interfaces, the type of interface is changed to the Class Ⅱ system

Info:

Periodical:

Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie

Pages:

3389-3392

DOI:

10.4028/www.scientific.net/MSF.475-479.3389

Citation:

M. L. Wang et al., "Influence of Nb on the Interface Structure of Tungsten Fiber Reinforced Zr-Based Bulk Metallic Glass Composites", Materials Science Forum, Vols. 475-479, pp. 3389-3392, 2005

Online since:

January 2005

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$35.00

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