Enhanced radiation tolerance of YSZ/Al2O3 multilayered nanofilms with pre-existing nanovoids

Wang, Hui; Ren, Feng; Tang, Jun; Qin, Wenjing; Hu, Lulu; Dong, Lan; Yang, Bin; Cai, Guangxu; Jiang, Changzhong

doi:10.1016/j.actamat.2017.11.018

Cited by 32 publications

(7 citation statements)

References 34 publications

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“…These defects impede the dislocation mobility and so harden the material. The softening caused by He irradiation is also reported, 50 but it only takes place for relatively large bubbles at the grain boundaries of the nanocrystalline or nano‐multilayer films. The bubbles promote boundary sliding and dislocation emission, which causes softening, and subsequently it is not considered for micron‐scale grain and film thickness.…”

Section: Resultsmentioning

confidence: 88%

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: 88%

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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“…In the past ten years, nano-films have played a significant role in the development of nano/microelectronic devices owing to their high strength, wear resistance, and good resistance to radiation [71,72,73]. The elastic modulus, hardness, and plastic deformation of nano-film materials are different from those of traditional thin-film materials.…”

Section: Deformation Of Materialsmentioning

confidence: 99%

Deformation of Single Crystals, Polycrystalline Materials, and Thin Films: A Review

Yang

Park

2019

Materials

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With the rapid development of nano-preparation processes, nanocrystalline materials have been widely developed in the fields of mechanics, electricity, optics, and thermal physics. Compared to the case of coarse-grained or amorphous materials, plastic deformation in nanomaterials is limited by the reduction in feature size, so that they generally have high strength, but the toughness is relatively high. The “reciprocal relationship” between the strength and toughness of nanomaterials limits the large-scale application and development of nanomaterials. Therefore, the maintenance of high toughness while improving the strength of nanomaterials is an urgent problem to be solved. So far, although the relevant mechanism affecting the deformation of nanocrystalline materials has made a big breakthrough, it is still not very clear. Therefore, this paper introduces the basic deformation type, mechanism, and model of single crystals, polycrystalline materials, and thin films, and aims to provide literature support for future research.

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“…Up to now, a majority of the work has focused on crystalline materials of metals, ionic solids, and covalent network solids. Although the details of microstructural damage vary drastically for various materials, the nature of the damage in crystalline materials is mostly associated with the generation, distribution, and interaction of point defects (interstitials and vacancies) and their clusters, which could result in material swelling, amorphization, embrittlement, and other failures. − To control the defect behavior, nanostructured features in various forms such as nanocrystals, , nanotwins, nanolaminates, , and nanopores have received considerable interest. The interfaces, grain boundaries, or surfaces within a material is suggested to aid in defect recovery by acting as long-range defect transport vehicles and provide sites for defect recombination, thus reducing damage accumulation and enhancing radiation resistance of materials. , …”

Section: Introductionmentioning

confidence: 99%

Radiation Effects in the Crystalline–Amorphous SiOC Polymer-Derived Ceramics: Insights from Experiments and Molecular Dynamics Simulation

Niu

Gao

Zhao

et al. 2021

ACS Appl. Mater. Interfaces

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Radiation-tolerant materials are in great demand for safe operation and advancement of nuclear and aerospace systems. Nanostructuring is a key strategy to improve the radiation tolerance of materials. SiOC polymer-derived ceramics (PDCs) are unique synthetic nanocomposites consisting of β-SiC nanocrystals and turbostratic graphite distributed in amorphous SiOC matrix, which are "all-rounder" materials for many advanced structural and functional applications. Radiation effects in the crystalline−amorphous system have been investigated in detail by experiments and molecular dynamics (MD) simulations. The results indicate that the amorphous SiOC structure retains amorphous accompanied by redistribution of the Si-containing tetrahedra. The graphite is shown to amorphize more easily than β-SiC nanocrystals under the same irradiation condition. The sample richer in oxygen, namely, containing more amorphous SiOC, shows less disordering of graphite, resulting from greater mitigation of radiation damage by the amorphous phase as efficient sinks. This study provides details of the microstructure evolution of SiOC PDCs under ion irradiation, as well as insights for the design and development of advanced ion damage-resistant materials.

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Enhanced radiation tolerance of YSZ/Al2O3 multilayered nanofilms with pre-existing nanovoids

Cited by 32 publications

References 34 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

Deformation of Single Crystals, Polycrystalline Materials, and Thin Films: A Review

Radiation Effects in the Crystalline–Amorphous SiOC Polymer-Derived Ceramics: Insights from Experiments and Molecular Dynamics Simulation

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Enhanced radiation tolerance of YSZ/Al2O3 multilayered nanofilms with pre-existing nanovoids

Cited by 32 publications

References 34 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

Deformation of Single Crystals, Polycrystalline Materials, and Thin Films: A Review

Radiation Effects in the Crystalline–Amorphous SiOC Polymer-Derived Ceramics: Insights from Experiments and Molecular Dynamics Simulation

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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