Jonas R. Kessing, Alexander T. Nadermann, C. Brandon Shaver, Allyssa Bateman, Brian J. Jaques, David J. Sprouster, Justin L. Milner, Steven J. Zinkle
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Sintering behavior of ZrC, NbC, TaC, and (Zr0.33, Nb0.33, Ta0.33)C and the effects of powder impurities
When mixed with uranium carbide, solid solutions of niobium carbide (NbC), tantalum carbide (TaC), and zirconium carbide (ZrC) are potential fuel candidates for nuclear thermal propulsion applications due to their high melting temperatures, stability in hot hydrogen, and low cross section of absorption for thermal neutrons. In this study, the spark plasma sintering (SPS) conditions to reach >95% relative density were determined for NbC, TaC, and ZrC mono-carbides and (Zr0.33, Nb0.33, Ta0.33)C. Oxide impurities found in one feedstock of ZrC were determined to significantly impact the SPS sintering conditions of the mono-carbide and tri-carbide samples containing the impure ZrC powder. The sintering temperature required to reach >95% relative density for the tri-carbide mixtures was found to be influenced most by the constituent with the lowest melting temperature, ZrC. The calculated densification activation energies for (Zr0.33, Nb0.33, Ta0.33)C were comparable to those of the ZrC powders, with impurity content varying based on the material supplier.
期刊介绍：
The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials.
Papers on fundamental ceramic and glass science are welcome including those in the following areas:
Enabling materials for grand challenges[...]
Materials design, selection, synthesis and processing methods[...]
Characterization of compositions, structures, defects, and properties along with new methods [...]
Mechanisms, Theory, Modeling, and Simulation[...]
JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.
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