Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 113, Issue 1, Pages 338-341Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2008.07.095
Keywords
Ceramics; Microstructure; Mechanical properties; Thermal properties
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Funding
- National Natural Science Foundation of China [50702016, 50602010, 90505015]
- China postdoctoral Science Foundation and the Development program for Outstanding Young Teachers in HIT
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A water-quenching technique was adopted to evaluate the thermal shock behavior of hot-pressed ZrB2-SiC and ZrB2-SiC-graphite composites in an air atmosphere. The strength retention of the two kinds of composites was measured after varying temperature (Delta T-c) up to 1000 degrees C. Monolithic ZrB2-SiC showed rapidly drop in flexural strength above Delta T of 400 degrees C, however the critical thermal shock temperature difference (Delta T-c) is enhanced by adding graphite, and the ZrB2-SiC-graphite composite showed a higher retained strengths up to 1000 degrees C. The main reasons for a great improvement of thermal shock resistance (TSR) were also discussed and analyzed. (C) 2008 Elsevier B.V. All rights reserved.
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