TY - JOUR

T1 - From high-entropy alloys to high-entropy ceramics

T2 - The radiation-resistant highly concentrated refractory carbide (CrNbTaTiW)C

AU - Tunes, Matheus

AU - Fritze, S.

AU - Osinger, Barbara

AU - Willenshofer, Patrick

AU - Alvarado, Andrew M.

AU - Martinez, Enrique

AU - Menon, Ashok S.

AU - Ström, Petter

AU - Greaves, Graeme

AU - Lewin, E.

AU - Jansson, Ulf

AU - Pogatscher, Stefan

AU - Saleh, Tarik A.

AU - Vishnyakov, Vladimir M.

AU - El-Atwani, Osman

N1 - Publisher Copyright: © 2023

PY - 2023/3/21

Y1 - 2023/3/21

N2 - High-entropy materials represent the state-of-the-art on the alloy design strategy for future applications in extreme environments. Recent data indicates that high-entropy alloys (HEAs) exhibit outstanding radiation resistance in face of existing diluted alloy counterparts due to suppressed damage formation and evolution. An extension of the HEA concept is presented in this paper towards the synthesis and characterization of novel high-entropy ceramics as emergent materials for application in environments where energetic particle irradiation is a major concern. A novel carbide within the quinary refractory system CrNbTaTiW has been synthesized using magnetron-sputtering. The material exhibited nanocrystalline grains, single-phase crystal structure and C content around 50 at.%. Heavy-ion irradiation with in-situ Transmission Electron Microscopy was used to assess the irradiation response of the new high-entropy carbide (HEC) at 573 K and a comparison with the HEA within the system is made. No displacement damage effects appear within the microstructures of both HEA and HEC up to a dose of 10 displacements-per-atom. Surprisingly, the HEC has not amorphized under the investigated conditions. Xe was implanted in both materials and bubbles nucleated, but smaller sizes compared with conventional nuclear materials shedding light they are potential candidates for use in nuclear energy.

AB - High-entropy materials represent the state-of-the-art on the alloy design strategy for future applications in extreme environments. Recent data indicates that high-entropy alloys (HEAs) exhibit outstanding radiation resistance in face of existing diluted alloy counterparts due to suppressed damage formation and evolution. An extension of the HEA concept is presented in this paper towards the synthesis and characterization of novel high-entropy ceramics as emergent materials for application in environments where energetic particle irradiation is a major concern. A novel carbide within the quinary refractory system CrNbTaTiW has been synthesized using magnetron-sputtering. The material exhibited nanocrystalline grains, single-phase crystal structure and C content around 50 at.%. Heavy-ion irradiation with in-situ Transmission Electron Microscopy was used to assess the irradiation response of the new high-entropy carbide (HEC) at 573 K and a comparison with the HEA within the system is made. No displacement damage effects appear within the microstructures of both HEA and HEC up to a dose of 10 displacements-per-atom. Surprisingly, the HEC has not amorphized under the investigated conditions. Xe was implanted in both materials and bubbles nucleated, but smaller sizes compared with conventional nuclear materials shedding light they are potential candidates for use in nuclear energy.

UR - http://www.scopus.com/inward/record.url?scp=85150388515&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2023.118856

DO - 10.1016/j.actamat.2023.118856

M3 - Article

VL - 250.2023

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

IS - 15 May

M1 - 118856

ER -