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Volume 5 Issue 1
Jan.  2023
Article Contents

Monteverde F, Gaboardi M, Saraga F, Feng L, Fahrenholtz W, Hilmas G. 2023. Anisotropic thermal expansion in high-entropy multicomponent AlB2-type diboride solid solutions. Int. J. Extrem. Manuf. 5 015505.
Citation: Monteverde F, Gaboardi M, Saraga F, Feng L, Fahrenholtz W, Hilmas G. 2023. Anisotropic thermal expansion in high-entropy multicomponent AlB2-type diboride solid solutions. Int. J. Extrem. Manuf. 015505.

Anisotropic thermal expansion in high-entropy multicomponent AlB2-type diboride solid solutions


doi: 10.1088/2631-7990/acabee
More Information
  • Received Date: 2022-05-26
  • Accepted Date: 2022-12-15
  • Rev Recd Date: 2022-09-07
  • Publish Date: 2023-01-30
  • Fund Project:

    We are grateful to Elettra-Sincrotrone Trieste for providing beamtime and financial support for the XRPD experiments (proposals nr. 20200101 and 20210215).

  • High-entropy (HE) ultra-high temperature ceramics have the chance to pave the way for future applications propelling technology advantages in the fields of energy conversion and extreme environmental shielding. Among others, HE diborides stand out owing to their intrinsic anisotropic layered structure and ability to withstand ultra-high temperatures. Herein, we employed in-situ high-resolution synchrotron diffraction over a plethora of multicomponent compositions, with four to seven transition metals, with the intent of understanding the thermal lattice expansion following different composition or synthesis process. As a result, we were able to control the average thermal expansion (TE) from 1.3×10-6 to 6.9×10-6 K-1 depending on the combination of metals, with a variation of in-plane to out-of-plane TE ratio ranging from 1.5 to 2.8.

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Anisotropic thermal expansion in high-entropy multicomponent AlB2-type diboride solid solutions

doi: 10.1088/2631-7990/acabee
  • 1 National Research Council of Italy, Institute of Science Technology and Sustainability for Ceramics, Faenza 48018, RA, Italy;
  • 2 Elettra-Sincrotrone Trieste S. C. P. A, Strada Statale 14-Km 163, 5 in AREA Science Park, Basovizza 34149, Trieste, Italy;
  • 3 Missouri University of Science and Technology, Rolla, MO 65409, United States of America
Fund Project:

We are grateful to Elettra-Sincrotrone Trieste for providing beamtime and financial support for the XRPD experiments (proposals nr. 20200101 and 20210215).

Abstract: 

High-entropy (HE) ultra-high temperature ceramics have the chance to pave the way for future applications propelling technology advantages in the fields of energy conversion and extreme environmental shielding. Among others, HE diborides stand out owing to their intrinsic anisotropic layered structure and ability to withstand ultra-high temperatures. Herein, we employed in-situ high-resolution synchrotron diffraction over a plethora of multicomponent compositions, with four to seven transition metals, with the intent of understanding the thermal lattice expansion following different composition or synthesis process. As a result, we were able to control the average thermal expansion (TE) from 1.3×10-6 to 6.9×10-6 K-1 depending on the combination of metals, with a variation of in-plane to out-of-plane TE ratio ranging from 1.5 to 2.8.

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