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Title: Spark plasma sintering of superhard B4C–ZrB2 ceramics by carbide boronizing
Authors: Zou, Ji ×
Huang, Shuigen
Vanmeensel, Kim
Guo Jun, Zhang
Vleugels, Jef
Van der Biest, Omer #
Issue Date: Apr-2013
Publisher: American Ceramic Society
Series Title: Journal of the American Ceramic Society vol:96 issue:4 pages:1055-1059
Abstract: A carbide boronizing method was first developed to produce dense boron carbide- zirconium diboride (“B4C”–ZrB2) composites from zirconium carbide (ZrC) and amorphous boron powders (B) by Spark Plasma Sintering at 1800°C–2000°C. The stoichiometry of “B4C” could be tailored by changing initial boron content, which also has an influence on the processing. The self-propagating high-temperature synthesis could be ignited by 1 mol ZrC and 6 mol B at around 1240°C, whereas it was suppressed at a level of 10 mol B. B8C–ZrB2 ceramics sintered at 1800°C with 1 mole ZrC and 10 mole B exhibited super high hardness (40.36 GPa at 2.94 N and 33.4 GPa at 9.8 N). The primary reason for the unusual high hardness of B8C–ZrB2 ceramics was considered to be the formation of nano-sized ZrB2 grains.
ISSN: 0002-7820
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Surface and Interface Engineered Materials
× corresponding author
# (joint) last author

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