Abstract
Reports on unique properties achieved with high-entropy alloys have motivated the application of the multicomponent approach to oxide materials. We have applied this methodology to an alumina-based spinel oxide, resulting in the synthesis of polycrystalline (Mg1/5Ni1/5Co1/5Cu1/5Zn1/5)Al2O4. Samples were made by the polymeric steric entrapment technique and uniaxially hot-pressed to obtain dense pellets. Resonant ultrasound spectroscopy was used to evaluate the elastic behavior, allowing for a direct comparison of the mechanical properties of the multicomponent spinel to those of traditional MgAl2O4. High-temperature X-ray diffraction was used to investigate the high-temperature phase stability and thermal expansion behavior of (Mg1/5Ni1/5Co1/5Cu1/5Zn1/5)Al2O4.
Graphical abstract
Data availability
The data that support the findings of this study are available from the corresponding author, B.L.M, upon reasonable request.
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Acknowledgments
B.L.M. acknowledges the support of the Center for Materials Processing, a Tennessee Higher Education Commission (THEC) supported Accomplished Center of Excellence. D.G.M acknowledges support from the Gordon and Betty Moore Foundation’s EPiQS Initiative, Grant GBMF9069. Powder XRD and microscopy was performed at the Joint Institute for Advanced Materials (JIAM) Diffraction Facility and Microscopy Facility, respectively, located at the University of Tennessee, Knoxville. This material is based upon work partially supported by the Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium under Award Number DE-NA0003180. This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or limited, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
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Musicó, B.L., Smith, J.P., Wright, Q. et al. Synthesis, elastic properties, and high-temperature stability of multicomponent spinel oxide. MRS Communications 12, 723–728 (2022). https://doi.org/10.1557/s43579-022-00210-8
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DOI: https://doi.org/10.1557/s43579-022-00210-8