About this Abstract |
Meeting |
2026 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Ceramic Materials and Processing
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Presentation Title |
Preparation of Magnesium Tantalate Ceramics Guided by High-Temperature Phase Relationships in Ta2O5-MgO System |
Author(s) |
Yinghan Liu, Ruifang Wang, Yichen Xing, Yufei Shi, Yusi Che, Jilin He |
On-Site Speaker (Planned) |
Yinghan Liu |
Abstract Scope |
Magnesium tantalate has demonstrated promise for use in thermal barrier ceramics due to its excellent thermal properties and low cost. This study investigated the formation conditions and phase relationships of magnesium tantalates with different stoichiometric ratios, resulting in the synthesis of single-phase MgTa2O6 and Mg4Ta2O9. The thermodynamic data for the reactions between MgO and Ta₂O₅ to form magnesium tantalate were obtained via thermodynamic calculations using the measured heat capacities of MgTa2O6 and Mg4Ta2O9. MgTa2O6 and Mg4Ta2O9 were fabricated separately based on the effects of temperature, preforming pressure, and morphology of raw material tantalum pentoxide on the phase composition and microstructure of magnesium tantalate. The comprehensive performance and manufacturing cost of MgTa2O6 and Mg4Ta2O9 ceramics were evaluated. Mg4Ta2O9 ceramic has the advantage of comprehensive performance and manufacturing cost relative to conventional rare earth tantalate and yttria stabilized zirconia (YSZ), which is a promising alternative for next-generation thermal barrier coatings (TBCs) applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, High-Temperature Materials, Phase Transformations |