Characteristics and Mechanisms of Dynamic Oxidation for ZrB2-SiC Based UHTC

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

doi:10.4028/www.scientific.net/KEM.368-372.1722

Paper Titles

Preparation and Heat Treatment of High Purity Al(OH)₃ and Sr(OH)₂ Composite Powder
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Preparation and Characterization of Silica-Alumina-Pillared Montmorillonites with High Surface Area
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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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Characteristics and Mechanisms of Dynamic Oxidation for ZrB₂-SiC Based UHTC

Abstract:

The present study focuses on the dynamic oxidation resistance of five representative ZrB2-SiC based ultra-high temperature ceramics (UHTCs): ZrB2-SiC, ZrB2-SiC-Si3N4, ZrB2-SiC-TiB2, ZrB2-SiCHfB2 and ZrB2-SiC-ZrC using oxyacetylene torch and arc jet testing. The effects of second phase incorporation (Si3N4, TiB2, HfB2, ZrC) on oxidation resistance were compared and analyzed. The mechanism of oxidation based on experimental results and thermodynamic calculations were explored. Some approaches to improvement of oxidation resistance and future directions of UHTC are also presented.