Radiation-induced segregation in a ceramic

Wang, Xing; Zhang, Hongliang; Baba, T.; Jiang, Hao; Liu, Cheng; Guan, Yingxin; Elleuch, Omar; Kuech, T. F.; Morgan, Dane; Idrobo, Juan Carlos; Voyles, Paul M.; Szlufarska, Izabela

doi:10.1038/s41563-020-0683-y

Cited by 65 publications

(29 citation statements)

References 43 publications

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“…The materials used in this work were polycrystalline bulk Fe2AlB2, MoAlB, Ti3SiC2 and Ti2AlC, prepared by reactive hot press sintering. The polycrystalline 3C-SiC for this research was purchased from Rohm and Haas Company and it had an average grain size of 5 μm [21].…”

Section: Methodsmentioning

confidence: 99%

Defect behavior and radiation tolerance of MAB phases (MoAlB and Fe2AlB2) with comparison to MAX phases

Zhang

Kim

et al. 2020

Acta Materialia

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MAB phases are a new class of layered ternary materials that have already shown a number of outstanding properties. Here, we investigate defect evolution and radiation tolerance of two MAB phases, MoAlB and Fe2AlB2, using a combination of experimental characterization and firstprinciples calculations. We find that Fe2AlB2 is more tolerant to radiation-induced amorphization than MoAlB, both at 150 °C and at 300 °C. The results can be explained by the fact that the Mo Frenkel pair is unstable in MoAlB and as a result, irradiated MoAlB is expected to have a significant concentration of MoAl antisites, which are difficult to anneal even at 300 °C. We find that the tolerance to radiation-induced amorphization of MAB phases is lower than in MAX phases, but it is comparable to that of SiC. However, MAB phases do not show radiation-induced cracking which is observed in MAX phases under the same irradiation conditions. This study suggests that MAB phases might be a promising class of materials for applications that involve radiation.

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Section: Methodsmentioning

confidence: 99%

Defect behavior and radiation tolerance of MAB phases (MoAlB and Fe2AlB2) with comparison to MAX phases

Zhang

Kim

et al. 2020

Acta Materialia

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“…These point defects can evolve into extended defects such as dislocation loops, cavities, or stacking fault tetrahedra [11][12][13][14][15]. In some cases, element segregation, phase transition and chemical interactions can be induced by irradiation [16][17][18][19][20]. The effects of irradiation in materials are strongly related to their crystal structure and chemical composition [21,22].…”

Section: Introductionmentioning

confidence: 99%

Phase and defect evolution in uranium-nitrogen-oxygen system under irradiation

Khafizov

Jiang

et al. 2021

Acta Materialia

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“…In particular, low energy protons are of particular interest as they stop within the cell causing more damage than higher energy ones that pass through. There exist opportunities to study the impact of proton radiation, for example, hydrogen implantation on perovskites' i) chemical bonds by vibration spectroscopy, ii) grain boundary properties by scanning probe microscopy, nano-infrared spectroscopy, iii) defect related traps, iv) slow carrier dynamics (and their origins), and v) radiation-induced segregation which is well known in metals and most recently in ceramics [163] but unknown in metal halide perovskites. Finally, metal grids will inevitably be used in space cells for area scale up.…”

Section: Electron and Proton Radiationmentioning

confidence: 99%

Deployment Opportunities for Space Photovoltaics and the Prospects for Perovskite Solar Cells

Ho‐Baillie

Sullivan

Bannerman

et al. 2021

Adv Materials Technologies

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systems currently being developed. A satellite internet constellation is a network of satellites orbiting in low-Earth orbit (LEO) to provide a global, continuous, low-latency, high bandwidth (broadband) internet service. The largest constellation planned so far is the SpaceX Starlink network with 42 000 LEO satellites. [1] In addition there is Amazon's Project Kuiper with 3236 LEO satellites, and the UK government's OneWeb containing 48 000 satellites. [2,3] Satellites are designed to operate for 3 to 4 years with ≈90-min day/night cycle. These systems require solar arrays to power each of the satellites that makeup the system. For the 42 000 Starlink satellites, estimates for solar power generation using 18% efficient devices [4] will be 316 MW (very conservative) or 526 MW using 30% efficient devices (Table S1, Supporting Information). This is for the currently planned SpaceX Starlink market alone, it is anticipated that solar power market for global internet constellations will be twice this amount approaching gigawatt (GW) level. As the focus for many of these satellites will be optimization on cost, there is an appetite for low cost cells with high specific power. As of July 2021 there is currently 5 MW of solar power being generated via currently deployed Starlink satellites. Space Settlement and ColonizationSpace settlement and colonization is the continuing presence of humans in space, beyond human spaceflight or operating space outposts. Although hypothetical at present, the construction of a space colony should be considered, keeping in mind a wide range of technological and economic challenges and possible solutions and research opportunities. The US National Aeronautics and Space Administration (NASA) Artemis program plans to permanently return humans to the Moon in 2024 and test the foundational technology for eventual human exploration of Mars [5] in the 2030's. In addition to government space programs the last 10 years has seen a major push from private individuals to accelerate the development of space technologies to allow for permanent colonization of space, the Moon, Mars, and beyond [6][7][8][9][10] . As the cost of launch has fallen by ≈23 times in the last decade [11] for sustainable commercialThe rapid progress in space exploration, mining, and tourism has been fuelled by both public and private sector investments. The latter has led to the need to reduce manufacturing and launch cost of space hardware to create a competitive and sustainable space economy. A major step in making space accessible is to develop affordable power systems for "commercial space" use. Photovoltaics has in the past and will in the future be a key component. Metal halide perovskite solar cells show the greatest potential of all emerging technologies for low-cost space photovoltaics. They have demonstrated the highest rate of power conversion efficiency improvement. Compared to the triple junction III-V compound semiconductor cells commonly used for space applications, perovskite cells have a higher power to weight ...

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Radiation-induced segregation in a ceramic

Cited by 65 publications

References 43 publications

Defect behavior and radiation tolerance of MAB phases (MoAlB and Fe2AlB2) with comparison to MAX phases

Defect behavior and radiation tolerance of MAB phases (MoAlB and Fe2AlB2) with comparison to MAX phases

Phase and defect evolution in uranium-nitrogen-oxygen system under irradiation

Deployment Opportunities for Space Photovoltaics and the Prospects for Perovskite Solar Cells

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