About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond III
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Presentation Title |
E-11: Development of Oxide Melt Solution Calorimetry for High Entropy Ceramics |
Author(s) |
Stuart Ness, Scott J McCormack |
On-Site Speaker (Planned) |
Stuart Ness |
Abstract Scope |
High entropy ceramics are a field of growing interest. Since the description of 5-component oxides in 2016, a variety of high entropy ceramics have been described. These include other species of high entropy oxides, as well as 5-component carbides, nitrides, and diborides. However, there is a general lack of experimental formation enthalpies and mixing enthalpies available for these materials. One reason for this paucity of data is the difficulty in applying traditional calorimetric techniques (such as direct reaction or bomb calorimetry) to materials with many components. A promising solution to determine enthalpies of mixing and of formation in high entropy systems is oxide melt solution calorimetry (OMSC). In this work we demonstrate how OMSC can be adapted to measure formation enthalpies in high entropy oxides, carbides, nitrides, and diborides. This work also reports current calorimetric progress for high entropy ceramics, highlighting strengths and strategies for OMSC of high entropy ceramics. |