Antonio Vinci, Matteo Mor, Luca Zoli, Diletta Sciti
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Effect of WC addition on the mechanical properties and oxidation resistance of ZrB2/SiC-based UHTCMCs
The sintering behavior, mechanical properties, and oxidation resistance of carbon fiber reinforced ZrB2/SiC/WC composites were investigated. Sintering was carried out between 1800 and 2000°C via hot pressing at 40 MPa. WC was completely consumed in the process, and the resulting microstructure was characterized by the formation of Zr1−xWxC solid solutions and WB at the ZrB2 border grains. The sample sintered at 1800°C was characterized by high porosity, whereas the sample sintered at 2000°C was fully dense, but fibers were severely degraded. A temperature of 1900°C allowed to obtain 92% relative density while preserving the fibers integrity, which was reflected in the higher mechanical properties. Comparing these results with a reference ZrB2/SiC composite, the addition of WC did not seem to significantly affect the mechanical properties, but it promoted the formation of a more compact oxide scale during oxidation, resulting in the higher protection of the material at 1650°C in air.
期刊介绍：
The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas:
Nanotechnology applications;
Ceramic Armor;
Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors);
Ceramic Matrix Composites;
Functional Materials;
Thermal and Environmental Barrier Coatings;
Bioceramic Applications;
Green Manufacturing;
Ceramic Processing;
Glass Technology;
Fiber optics;
Ceramics in Environmental Applications;
Ceramics in Electronic, Photonic and Magnetic Applications;
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