Toughening of ZrB2–SiC ceramics with the microstructure ZrB2/Zr–Al–C fibrous monolith

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 2012 English Publisher:Elsevier BVJournal:Scripta Materialia, volume 66, pages 296-299 (issn: 1359-6462,

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Authors: Qilong Guo; Junguo Li; Qiang Shen; Lianmeng Zhang;

doi: 10.1016/j.scriptamat.2011.11.013

Toughening of ZrB2–SiC ceramics with the microstructure ZrB2/Zr–Al–C fibrous monolith

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Abstract

A ZrB 2 –20 vol.% SiC–30 vol.% Zr–Al–C ceramic was fabricated by hot pressing at 1900 °C and 30 MPa for 1 h in vacuum. The ZrB 2 –SiC/Zr–Al–C ceramic showed an excellent fracture toughness of 5.4 ± 0.4 MPa m 1/2 due to its ZrB 2 /Zr–Al–C fibrous monolith microstructure and the in situ formed layered Zr–Al–C grains, which could enhance crack deflection, crack bridging and crack branching. In addition, the weaker interface bonding and weaker internal layers existed within the Zr–Al–C crystal.

Related Organizations

Wuhan Polytechnic University
China (People's Republic of)
State Key Laboratory of Advanced Technology For Materials Synthesis and Processing
China (People's Republic of)
Wuhan University of Technology
China (People's Republic of)

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