Current development of body-centered cubic high-entropy alloys for nuclear applications

Shi, Tan; Lei, Penghui; Xu, Yan; Li, Jing; Zhou, Yun-Di; Wang, Yunpeng; Su, Zhengxiong; Dou, Yajie; He, Xinfu; Yun, Di; Yang, Wen; Lu, Chenyang

doi:10.1007/s42864-021-00086-6

Cited by 45 publications

(6 citation statements)

References 197 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Robust superconductivity with respect to disorder has been proposed on the basis of experimental observations of the insensitivity of the T c of HEA superconductors to the disorder introduced by different levels of constituent atoms 16 , 34 . In addition, the stable superconductivity of HEAs containing the radioactive element U makes HEA superconductors promising for application in heavy-irradiation environments, such as in aerospace applications and nuclear fusion 6 , 7 . However, to the best of our knowledge, no studies have investigated the effect of ion irradiation on HEA superconductors.…”

Section: Resultsmentioning

confidence: 99%

“…The superconductivity of HEAs was discovered in 2014 in Ta–Nb–Hf–Zr–Ti multi-principal element alloy, attracting considerable interest in their pairing mechanism; generally, a high level of disorder in crystalline superconductors limits the formation of Cooper pairs partially owing to the decrease in the density of states or the increase in effective Coulomb repulsion between paired electrons 9 , 10 . In addition, the unique properties of HEAs, such as their high hardness, high strength, and excellent irradiation tolerance, are advantageous for use under extreme conditions such as those in aerospace applications, irradiation environments, and superconducting (SC) rotating machines 2 – 4 , 6 , 11 . Recently, the robust superconductivity of Ta–Nb–Hf–Zr–Ti HEAs under extremely high pressures of approximately 190 GPa has been reported 5 , where the unit cell volume of Ta–Nb–Hf–Zr–Ti HEAs was expected to be considerably compressed by ~53%.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

et al. 2022

View full text Add to dashboard Cite

High-entropy alloy (HEA) superconductors—a new class of functional materials—can be utilized stably under extreme conditions, such as in space environments, owing to their high mechanical hardness and excellent irradiation tolerance. However, the feasibility of practical applications of HEA superconductors has not yet been demonstrated because the critical current density (Jc) for HEA superconductors has not yet been adequately characterized. Here, we report the fabrication of high-quality superconducting (SC) thin films of Ta–Nb–Hf–Zr–Ti HEAs via a pulsed laser deposition. The thin films exhibit a large Jc of >1 MA cm−2 at 4.2 K and are therefore favorable for SC devices as well as large-scale applications. In addition, they show extremely robust superconductivity to irradiation-induced disorder controlled by the dose of Kr-ion irradiation. The superconductivity of the HEA films is more than 1000 times more resistant to displacement damage than that of other promising superconductors with technological applications, such as MgB2, Nb3Sn, Fe-based superconductors, and high-Tc cuprate superconductors. These results demonstrate that HEA superconductors have considerable potential for use under extreme conditions, such as in aerospace applications, nuclear fusion reactors, and high-field SC magnets.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The strain corresponding to a compression fracture of MoNbTaW HEA at room temperature was 2.6%. While the compression fracture strain of MoNbTaTi x W, MoNbTaTiVW, NbTaTiVW, and Ti 8 Nb 23 Mo 23 Ta 23 W 23 HEAs at room temperatures can reach 11.5%-14.1%, 10.6%, 20%, and 21.3%, respectively [6][7][8][9][10][11]. HfNbTaTiZr HEA and its derived alloys containing Ti and Zr exhibited excellent strengths and ductility [6,[12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…While the compression fracture strain of MoNbTaTi x W, MoNbTaTiVW, NbTaTiVW, and Ti 8 Nb 23 Mo 23 Ta 23 W 23 HEAs at room temperatures can reach 11.5%-14.1%, 10.6%, 20%, and 21.3%, respectively [6][7][8][9][10][11]. HfNbTaTiZr HEA and its derived alloys containing Ti and Zr exhibited excellent strengths and ductility [6,[12][13][14][15][16][17][18][19]. Due to the huge difference in the atomic radius, HfNbTaTiZr HEA shows heterogeneously large lattice distortion.…”

Section: Introductionmentioning

confidence: 99%

Defect properties of a body-centered cubic equiatomic TiVZrTa high-entropy alloy from atomistic simulations

Li¹,

Qiang²

2023

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

TiVZrTa high-entropy alloys (HEAs) have been experimentally proven to exhibit excellent irradiation tolerance. In this work, defect energies and evolution were studied to reveal the underlying mechanisms of the excellent irradiation tolerance in TiVZrTa HEA via molecular statics calculations and molecular dynamics simulations. The atomic size mismatch of TiVZrTa is ∼6%, suggesting a larger lattice distortion compared to most face-centered cubic and body-centered cubic M/HEAs. Compared to pure Ta and V, smaller vacancy formation and migration energies with large energy spreads lead to higher equilibrium vacancy concentration and faster vacancy diffusion via low-energy migration paths. Vacancies in TiVZrTa have weaker abilities to form large vacancy clusters and prefer to form small clusters, indicating excellent resistance to radiation swelling. The formation energies of different types of dumbbells in TiVZrTa show significant differences and have large energy spreads. The binding abilities of interstitials in TiVZrTa are weaker compared to that in pure Ta and V. In TiVZrTa, fast vacancy diffusion and slow interstitial diffusion result in closer mobilities of vacancies and interstitials, significantly promoting point defect recombination. We further studied the effects of short-range ordered structures (SROs) on defect diffusion and evolution. SROs in TiVZrTa can effectively lead to higher fractions of defect recombination and fewer surviving defects. Our findings provide a comprehensive understanding of the underlying mechanisms of the high irradiation tolerance in body-centered cubic HEAs with large lattice distortion and suggest SROs are beneficial microstructures for enhancing irradiation tolerance.

show abstract

“…High-entropy alloys (HEAs) have attracted broad attention from the research community due to their variety of extraordinary properties, including improved radiation resistance, [1][2][3][4][5] better strength-to-weight ratio, tensile strength, 6,7 and corrosion and oxidation resistance. 8,9 HEAs typically consist of four or more principal elements in equimolar ratios.…”

Section: Introductionmentioning

confidence: 99%

Influence of magnetic properties on elemental vacancy migration energy in Fe49.5Mn29.4Co10.1Cr10.1C0.9 high-entropy alloy

Ibrahim,

Shi,

et al. 2024

AIP Advances

Self Cite

View full text Add to dashboard Cite

Randomly mixing ferromagnetic (FM) and antiferromagnetic (AFM) elements in high-entropy alloys (HEAs) can create fluctuating local magnetic moments that influence the energetics of point defects. In this study, we employed first-principles calculations to investigate the influence of magnetic properties on vacancy migration energy in Fe49.5Mn29.4Co10.1Cr10.1C0.9, alongside equiatomic NiCoFeCrMn alloy. By examining structures with paramagnetism, ferromagnetism, and no spin polarization, our study reveals significant impacts of magnetic interactions on vacancy migration barriers, potentially altering the sequence of elemental migration energies if overlooked. In Fe49.5Mn29.4Co10.1Cr10.1C0.9, the order of vacancy migration barriers is Co > Fe > Mn > Cr across all magnetic states, suggesting the dominant roles of atomic properties and inherent chemical bonding. Conversely, the NiCoFeCrMn HEA exhibits a pronounced magnetic state-dependent elemental migration energy order, indicating that magnetic interactions significantly influence vacancy migration behavior in this alloy. In addition, while FM elements generally exhibit higher migration barriers, AFM elements display lower barriers in the investigated Cantor alloys, with notable variations between the studied compositions. These findings underscore the critical role of magnetism in accurate migration energy calculations, which is important for studying chemically biased diffusion and radiation-induced segregation in HEAs.

show abstract

Current development of body-centered cubic high-entropy alloys for nuclear applications

Cited by 45 publications

References 197 publications

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

Defect properties of a body-centered cubic equiatomic TiVZrTa high-entropy alloy from atomistic simulations

Influence of magnetic properties on elemental vacancy migration energy in Fe49.5Mn29.4Co10.1Cr10.1C0.9 high-entropy alloy

Contact Info

Product

Resources

About