Enhanced resistance to helium irradiations through unusual interaction between high-entropy-alloy and helium

Cheng, Tao; Guo, Wei; Jiang, Shengming; Zhang, Jian; Wang, Yongqiang; Liu, Peng; Hong, Mengqing; Guo, Enkai; Zhong, Fen; Cai, Guangxu; Jiang, Cong; Ren, Feng

doi:10.1016/j.actamat.2023.118765

Cited by 25 publications

(16 citation statements)

References 66 publications

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“…With the increase of He fluence, the thickness of fuzz continues to increase, and the radius of fuzz keeps decreasing in HEA/W-20, HEA/W-40, and HEA/W-60. In comparison to our previous results on bulk W and bulk HEA irradiated under the same conditions [15], the fuzz thickness of all the multilayers is less than that of the bulk W, while greater than that of the bulk HEA at the same He fluence. However, it is important to note that while the fuzz thickness of HEA/W multilayer films is greater than that of the HEA film at the same He plasma irradiation fluence, the fuzz transformation thickness of HEA/W multilayer films is significantly smaller than that of the HEA film (figure S8).…”

Section: The Irradiation Of Low-energy He Plasmacontrasting

confidence: 69%

“…HEA/W interfaces act as effective traps, capturing He/He clusters present in W layers. According to our previous research, we observed that increasing the radiation fluence of He + from 1 × 10 17 to 3 × 10 17 ions cm −2 led to a decrease in the density of He bubbles in both the HEA and W materials [15,31]. This means the density of He bubbles will decrease when He concentration is higher than a certain value.…”

Section: Interfacial Effects Under High Energy He + Irradiationmentioning

confidence: 79%

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Interfaces enhanced plasma irradiation resistance in CrMoTaWV/W multilayer films through blocking He diffusion

Qu,

Hong,

Wei

et al. 2024

Nucl. Fusion

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The performance of Plasma-facing materials (PFMs) is one of the key factors that significantly impact the stability of operation in fusion reactors. Herein, a new CrMoTaWV/W (HEA/W) multilayer structure is designed as PFM to investigate its resistance to He plasma irradiation. It was observed that the introduction of the interfaces effectively absorbed plenty of He atoms, preventing them from diffusing into the material and delaying the formation of fuzz incubation zone, therefore, enhancing the resistance to plasma irradiation. The thickness transformed to fuzz in the HEA/W multilayer films was observed to be about two-thirds of those in the CrMoTaWV (HEA) film. Additionally, the fuzz growth rates in HEA/W multilayer films are lower than the average growth rate of bulk W and HEA films. These findings highlight a promising new avenue for the exploration of high-performance PFMs.

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Section: The Irradiation Of Low-energy He Plasmacontrasting

confidence: 69%

Section: Interfacial Effects Under High Energy He + Irradiationmentioning

confidence: 79%

Interfaces enhanced plasma irradiation resistance in CrMoTaWV/W multilayer films through blocking He diffusion

Qu,

Hong,

Wei

et al. 2024

Nucl. Fusion

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“…98 This model has been used by many authors in the recent years to simulate high-entropy alloys. 99–104…”

Section: Methodsmentioning

confidence: 99%

“…98 This model has been used by many authors in the recent years to simulate highentropy alloys. [99][100][101][102][103][104] 3 Shape and size effects…”

Section: Methodsmentioning

confidence: 99%

The interplay between size, shape, and surface segregation in high-entropy nanoalloys

Calvo¹

2023

Phys. Chem. Chem. Phys.

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“…Helium could agglomerate into detrimental helium bubbles due to its extremely low solubility in alloys, leading to severe volume swelling and irradiation embrittlement. [8,9] This is one of the most critical problems that needs solving for future development of advanced structural materials.…”

Section: Introductionmentioning

confidence: 99%

Evolution of helium bubbles in FeCoNiCr-based high-entropy alloys containing γ′ nanoprecipitates

Feng 冯,

Jiang 蒋,

Hu 胡

et al. 2024

Chinese Phys. B

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A series of high-entropy alloys (HEAs) containing nanoprecipitates of varying sizes were successfully prepared by a non-consuming vacuum arc melting method. In order to study the irradiation evolution of helium bubbles in the FeCoNiCr-based HEAs with γ' precipitates, samples were irradiated with 100 keV helium ions to a fluence of 5 × 1020 ions/m2 at 293 K and 673 K. And the room temperature irradiated samples were annealed at different temperatures to examine the diffusion behavior of helium bubbles. Transmission electron microscope (TEM) was employed to characterize the structural morphology of precipitated nanoparticles and the evolution of helium bubbles. Experimental results reveal that nanosized, spherical, dispersed, coherent and ordered L12-type Ni3Ti γ' precipitations were introduced in FeCoNiCr(Ni3Ti)0.1 HEAs by means of ageing treatments at temperatures between 1073-1123 K. Under the ageing treatment conditions applied in this work, γ' nanoparticles were precipitated in FeCoNiCr(Ni3Ti)0.1 HEAs with average diameters of 15.80 nm, 37.00 nm and 62.50 nm, respectively. The average sizes of helium bubbles observed in samples after 673 K irradiation were 1.46 nm, 1.65 nm and 1.58 nm, respectively. The improvement in the irradiation resistance of FeCoNiCr(Ni3Ti)0.1 HEAs was evidenced by the diminution in bubbles size. Furthermore, FeCoNiCr(Ni3Ti)0.1 HEAs containing γ' precipitates of 15.8 nm exhibited the minimum size and density of He bubbles, which can be ascribed to the considerable helium trapping effects of heterogeneous coherent phase boundaries. Subsequently, annealing experiments conducted after 293 K irradiation indicate that HEAs containing precipitated phases exhibit smaller apparent activation energies (Ea) for helium bubbles, resulting in larger helium bubble sizes. This study provides guidance on improving the irradiation resistance of L12-strengthened high-entropy alloys.

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Enhanced resistance to helium irradiations through unusual interaction between high-entropy-alloy and helium

Cited by 25 publications

References 66 publications

Interfaces enhanced plasma irradiation resistance in CrMoTaWV/W multilayer films through blocking He diffusion

Interfaces enhanced plasma irradiation resistance in CrMoTaWV/W multilayer films through blocking He diffusion

The interplay between size, shape, and surface segregation in high-entropy nanoalloys

Evolution of helium bubbles in FeCoNiCr-based high-entropy alloys containing γ′ nanoprecipitates

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