About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
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Presentation Title |
Multi-component High Entropy Ultra-high Temperature Carbides: Solid-solution to High-entropy Phase Formation |
Author(s) |
Ambreen Nisar, Tyler Dolmetsch, Tanaji Paul, Cheng Zhang, Benjamin Boesl, Arvind Agarwal |
On-Site Speaker (Planned) |
Ambreen Nisar |
Abstract Scope |
The development of a new class of high entropy-ultra high temperature ceramics (HE-UHTCs) has gained increased interest due to the possibility that they can possess enhanced thermo-mechanical properties unattainable by conventional UHTCs. Though a large number of HE-UHTCs have emerged, the understanding on the factors such as solid-solutioning, entropy, and multi-component, contributing to the remarkable enhancement in the properties is still in a nascent stage. In this regard, systematically the constituents in a UHTCs were raised from monoliths to binary to ternary and then quaternary in (Ta,Nb,Hf,Ti)C UHTC system. The four-component system is expected to form HE-UHTCs whilst others showed mere solid-solutioning. Dense samples were produced using spark plasma sintering (SPS) at 1850 °C. This work will delineate the contributions of solid-solutioning vs high entropy towards enhancing thermo-mechanical properties in a multi-component UHTC carbide system. |