Journal
SCRIPTA MATERIALIA
Volume 59, Issue 11, Pages 1214-1217Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.08.014
Keywords
ZrB2/ZrO2; Functionally graded ceramics; SPS; Mechanical properties
Categories
Funding
- National Natural Science Foundation of China [90505015, 50602010, 50702016]
- Research Fund for the Doctoral Program of Higher Education [20060213031]
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ZrB2/ZrO2 functionally graded ceramics (FGCs), newly developed for ultrahigh-temperature application, were prepared by spark plasma sintering. Denser graded microstructure as well as a strong interface were achieved for ZrB2/ZrO2 FGC sintered at 1800 degrees C. Due to the phase transformation of ZrO2, the toughness of ZrB2/ZrO2 FGCs was increased from similar to 5 MPa m(1/2) for the ZrB2-rich layer to similar to 10 MPa m(1/2) for the ZrO2-rich layer. The effect of sintering temperature on the toughness of ZrB2/ZrO2 FGCs was further investigated. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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