Microstructure and Mechanical Properties of SiC Whisker-Reinforced ZrB2 Ultra-High Temperature Ceramic

Ping Hu; Xing Hong Zhang; Jie Cai Han; Song He Meng; Bao Lin Wang

doi:10.4028/www.scientific.net/KEM.368-372.1730

Paper Titles

Study of Different TiO₂ Electrode Structures on Dye-Sensitized Solar Cell
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Analysis of Profitability in Chinese Listed Ceramic Companies
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Characteristics and Mechanisms of Dynamic Oxidation for ZrB₂-SiC Based UHTC
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Effect of Glass Phase on the Thermal Shock Resistance of ZrB₂-SiC Ultra High Temperature Ceramic
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Microstructure and Mechanical Properties of SiC Whisker-Reinforced ZrB₂ Ultra-High Temperature Ceramic
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Efficient Synthesis/Sintering Routes to Obtain Fully Dense ZrB₂-SiC UHTC Materials
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Microstructure and Mechanical Properties of ZrB₂-Based UHTC via Reactive Hot Pressing
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Effect of the Rare Earth Oxides on Sintering Behavior and Microstructure of ZrB₂-SiC Ceramics
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Microstructure of ZrB₂–SiC Composite Fabricated by Spark Plasma Sintering
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Microstructure and Mechanical Properties of SiC Whisker-Reinforced ZrB₂ Ultra-High Temperature Ceramic

Abstract:

SiC whisker-reinforced ZrB2 matrix ultra-high temperature ceramic were prepared at 2000°C for 1 h under 30MPa by hot pressing and the effects of whisker on flexural strength and fracture toughness of the composites was examined. The flexural strength and fracture toughness are 510±25MPa and 4.05±0.20MPa⋅m1/2 at room temperature, respectively. Comparing with the SiC particles-reinforced ZrB2 ceramic, no significant increase in both strength and toughness was observed. The microstructure of the composite showed that the SiC whisker was destroyed because the SiC whisker degraded due to rapid atom diffusivity at high temperature. The results suggested that some related parameters such as the lower hot-pressing temperature, a short sintering time should be controlled in order to obtain SiC whiskerreinforced ZrB2 composite with high properties.