Simultaneous strengthening and toughening effects in WC–(nanoWC–Co)

Simultaneous hardening and toughening effects were found for WC–(nanoWC–Co) with microWC strengthening particles in nanoWC–Co cermet matrix. The high microhardness of 1683±176Hv comparable to that of nanoWC–12Co was attributed to the hardening effect from both microWC particles and nanoWC dispersion...

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Bibliographic Details
Published inScripta materialia Vol. 66; no. 10; pp. 777 - 780
Main Authors Yang, Guan-Jun, Gao, Pei-Hu, Li, Cheng-Xin, Li, Chang-Jiu
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.05.2012
Subjects
Cermets
Hardness
Nanostructured WC–Co matrix
Toughness
Toughness
Cermets
Nanostructured WC–Co matrix
Hardness
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Summary:Simultaneous hardening and toughening effects were found for WC–(nanoWC–Co) with microWC strengthening particles in nanoWC–Co cermet matrix. The high microhardness of 1683±176Hv comparable to that of nanoWC–12Co was attributed to the hardening effect from both microWC particles and nanoWC dispersion in the Co binder phase. The high fracture toughness of 18.9±4.0MPam1/2, comparable to that of microstructured WC–12Co, resulted from the larger area of the bimodal-sized fracture surface morphology and the crack bridging due to the microsized strengthening WC particles.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2012.02.005