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Microstructure and mechanical properties of ZrC[sbnd]W matrix composite prepared by reactive infiltration at 1300 °C

Authors
Journal
International Journal of Refractory Metals and Hard Materials
0263-4368
Publisher
Elsevier
Volume
37
Identifiers
DOI: 10.1016/j.ijrmhm.2012.10.014
Keywords
  • Liquid Infiltration
  • Composites
  • Microstructure
  • Mechanical Properties

Abstract

Abstract Fully dense ZrCW matrix composite was fabricated by reactive infiltration technique, where molten Zr2Cu alloy infiltrated into a porous WC preform at 1300°C in vacuum. The ZrCW composite exhibits a core-shell structure feature: gray WC cores were enveloped by bright tungsten shells, which are homogeneously distributed in the ZrC matrix. X-ray diffraction and transmission electron microscopy investigation show that nano-sized ZrxCuyCz particles were formed in the ZrC matrix. The Vicker's hardness, flexural strength and fracture toughness of the ZrCW composite are measured as 14.5GPa, 615MPa and 11.7MPam1/2, respectively.

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