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Microstructure and Mechanical Properties of Mo2FeB2 Based Cermets Containing SiC Whisker

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Abstract:

Four series of cermets with the SiC whisker content between 0 and 1.0 wt.% were prepared by vacuum sintering. The transverse rupture strength (TRS), hardness (HRA) and fracture toughness (KIC) were also measured. The SiC whisker addition was located at the grain boundaries, which prevented grain boundary migration and restrained the grain growth. However, an increasing SiC whisker content decreased the wettability of the binder on the Mo2FeB2 hard phase. The highest TRS and fracture toughness was found for the cermets with 0.5 wt.% SiC whisker addition, whereas the cermets without SiC whisker addition exhibited the maximum hardness.

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Periodical:

Advanced Materials Research (Volume 625)

Pages:

304-307

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.625.304

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Online since:

December 2012

Authors:

Hai Zhou Yu, Wen Jun Liu, Lian Ying, Min You

Keywords:

Mechanical Property, Microstructure, Mo2FeB2 Based Cermets, SiC Whisker Addition

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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