About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond III
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Presentation Title |
High-Entropy Carbide Ceramics: Transformative Materials for Extreme Environments |
Author(s) |
Bai Cui, Fei Wang, Xueliang Yan, Yongfeng Lu |
On-Site Speaker (Planned) |
Bai Cui |
Abstract Scope |
The concept of entropy stabilization has created promising opportunities for the design of new ceramic materials for extreme environments encountered in advanced nuclear reactors and gas turbines. High-entropy carbide ceramics (HECCs) are characterized by multiple metal elements in an equal or near-equal atomic ratio in the cation position but forms a stable single-phase lattice structure. The compositional complexity in HECCs can induce the atomic-level disorder, significant lattice distortion, and unique physical properties such as higher hardness, lower thermal conductivity, and improved oxidation resistance than the binary transition metal carbides. Since 2018, our team has developed a spark plasma sintering process for the synthesis of single-phase HECCs, reported their thermal and mechanical properties, and investigated their irradiation damage resistance for the first time. This talk will focus on our experimental research activities to reveal fundamental mechanisms governing the processing-microstructure-property relationship in these novel materials. |