Helium release and lattice swelling in nickel foil irradiated by multiply-energy helium ions

Huang, Huijie; Liu, Jizhao; Lei, Qiantao; Wang, Chunjie; Han, Zhibin; Guo, Yang; Li, Yan

doi:10.1016/j.nimb.2018.06.017

Cited by 15 publications

(10 citation statements)

References 31 publications

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“…The ion irradiation leads to a contraction of the lattice in a direction by 1.54% and an expansion of the lattice in c direction by 3.16%. Generally, in hexagonal close packed materials such as Cr 2 AlC, irradiation causes only a small change in the lattice constant a but a noticeable increase in the lattice constant c , resulting from the fact that interstitial defects typically aggregate on the basal plane 18,31,32 …”

Section: Resultsmentioning

confidence: 99%

“…Generally, in hexagonal close packed materials such as Cr 2 AlC, irradiation causes only a small change in the lattice constant a but a noticeable increase in the lattice constant c, resulting from the fact that interstitial defects typically aggregate on the basal plane. 18,31,32 After annealing at 430℃, the GIXRD spectrum exhibits only slight changes in the location and width of peaks, implying that the damage recovery resulting from the defect motion at this temperature is very low. The Rietveld refinement shows that the dominant fraction in the film is (Cr, Al) 2 C x , with only 8.3% of Cr 2 AlC (Table 1).…”

Section: Evolution Of Structure On Heirradiated Cr 2 Alc Due To Thementioning

confidence: 99%

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Annealing effects on the structure and hardness of helium‐irradiated Cr₂AlC thin films

Wang

et al. 2020

J. Am. Ceram. Soc.

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Cr 2 AlC MAX phase thin films prepared by radio-frequency magnetron sputtering were irradiated at room temperature by 100 keV helium ions to a fluence of 1 × 10 17 ions cm −2. The effects of thermal annealing on the structural and mechanical properties of the helium-irradiated Cr 2 AlC films as well as the helium release were investigated by grazing-incidence X-ray diffraction (GIXRD), Raman spectroscopy, and scanning electron microscope (SEM) in combination with nano-indentation and elastic recoil detection (ERD) analysis. The irradiation-induced structural damage in the Cr 2 AlC is significantly recovered by thermal annealing at temperatures around 600℃, attributed to high defect diffusivity. After annealing to 750℃, the hardness of irradiated films recovered almost completely, which is ascribes to both defect recombination and reformation of damaged chemical bonds. Substantial helium release occurring at this annealing temperature is closely related to the damage recovery due to helium irradiation.

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Section: Resultsmentioning

confidence: 99%

Section: Evolution Of Structure On Heirradiated Cr 2 Alc Due To Thementioning

confidence: 99%

Annealing effects on the structure and hardness of helium‐irradiated Cr₂AlC thin films

Wang

et al. 2020

J. Am. Ceram. Soc.

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“…This value as computed through ex situ microscopy analysis clearly fails to capture the the entire spectrum of defect morphologies which may be considered "swelling." Indeed, the literature commonly differentiates "lattice swelling" at the nanoscale [5], normally captured using X-ray diffraction [47], and "void swelling" at the mesoscale, the type of volume porosity captured here through electron microscopy, as separate effects. However, as evidenced through local elasticity, these different scales of vacancytype lattice defects impose the same fundamental changes on resulting properties.…”

Section: Resultsmentioning

confidence: 99%

The dynamic evolution of swelling in nickel concentrated solid solution alloys through in situ property monitoring

Dennett,

Dacus,

Barr

et al. 2021

Preprint

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While the high-temperature void swelling behavior in Ni-based concentrated solid solution alloys (CSAs) has received much attention, work to date has relied on traditional, post-irradiation microscopy to quantify swelling. Here, the dynamic evolution of swelling in five alloys of increasing complexity is observed using continuous, in situ measurements of thermoelastic properties in bulk specimens under ion beam irradiation. The evolution in elastic properties during swelling is found to be a function of the entire size spectrum of defects, not solely the mesoscale voids observed using microscopy, while changes in thermal transport properties depend sensitively on the partitioning of electronic and lattice thermal conductivity. This emerging class of in situ experiments provides unique insight into material dynamics otherwise unavailable using traditional methods.

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“…Numerous studies focusing on microstructural evolution of pure metals and alloys after irradiation have been performed using transmission electron microscope (TEM), X-ray diffraction (XRD), scanning electron microscope (SEM), etc. [ 11 , 12 , 13 ]. In recent years, with the application of nanoindentation technology, the hardening phenomenon of irradiated materials has been well characterized by testing the nanohardness value of the samples before and after irradiation [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Nanoindentation Study on the Creep Characteristics and Hardness of Ion-Irradiated Alloys

et al. 2020

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The Hastelloy N alloy, Alloy 800H and 316H stainless steel were irradiated by Xe20+ ion irradiation with energy of 4 MeV at room temperature (peak damage ranging from 0.5 to 10 dpa). The micromechanical properties, hardness and creep plasticity, of these three investigated alloys were characterized before and after irradiation using nanoindentation. The results show that the hardness increases, and creep plasticity degrades with increasing ion dose in all the samples. In comparison, Hastelloy N has good irradiation damage resistance, while that of the 800H and 316H alloys is slightly worse. Additionally, the approximate positive relationship between irradiation hardening and creep plasticity degradation means that the property of creep plasticity of irradiated materials can be reflected from the nanohardness measurement for the heavy ion irradiation cases.

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Helium release and lattice swelling in nickel foil irradiated by multiply-energy helium ions

Cited by 15 publications

References 31 publications

Annealing effects on the structure and hardness of helium‐irradiated Cr₂AlC thin films

Annealing effects on the structure and hardness of helium‐irradiated Cr₂AlC thin films

The dynamic evolution of swelling in nickel concentrated solid solution alloys through in situ property monitoring

Nanoindentation Study on the Creep Characteristics and Hardness of Ion-Irradiated Alloys

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Helium release and lattice swelling in nickel foil irradiated by multiply-energy helium ions

Cited by 15 publications

References 31 publications

Annealing effects on the structure and hardness of helium‐irradiated Cr2AlC thin films

Annealing effects on the structure and hardness of helium‐irradiated Cr2AlC thin films

The dynamic evolution of swelling in nickel concentrated solid solution alloys through in situ property monitoring

Nanoindentation Study on the Creep Characteristics and Hardness of Ion-Irradiated Alloys

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Annealing effects on the structure and hardness of helium‐irradiated Cr₂AlC thin films

Annealing effects on the structure and hardness of helium‐irradiated Cr₂AlC thin films