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Synthesis and Properties of Bulk Metallic Glass Matrix Composites

Published online by Cambridge University Press:  10 February 2011

Haein Choi-Yim ,
Ralf Busch  and
William L. Johnson
Haein Choi-Yim
Affiliation:
W.M. Keck Laboratory of Engineering Materials, Mail Code 138–78, California Institute of Technology, Pasadena, California 91125
Ralf Busch
Affiliation:
W.M. Keck Laboratory of Engineering Materials, Mail Code 138–78, California Institute of Technology, Pasadena, California 91125
William L. Johnson
Affiliation:
W.M. Keck Laboratory of Engineering Materials, Mail Code 138–78, California Institute of Technology, Pasadena, California 91125
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Abstract

Bulk metallic glass matrix composites are processed and investigated by X-ray diffraction, DSC, optical microscopy, SEM, microprobe, TEM, and mechanical testing. Ceramics such as SiC, WC, or TiC, and the metals W or Ta are introduced as reinforcements into the metallic melt. The metallic glass matrix remains amorphous after adding up to 30 vol% of particles. The thermal stability of the matrix does not deteriorate after adding the particles. ZrC layers form at the interfaces between the bulk metallic glasses and the WC or SiC particles. Si and W are released into the matrix in which Si enhanced the glass forming ability. The composites are tested in compression and tension experiments. Compressive strain to failure increases by over 300% compared to the unreinforced Zr57Nb5Al10Cu15.4Ni12.6 and the energy to break of the tensile samples increases by over 50% adding 15 vol. % W.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 554: Symposium MM – Bulk Metallic Glasses , 1998 , 393
Copyright
Copyright © Materials Research Society 1999

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