Review
Materials Science, Multidisciplinary
Zhouran Zhang, David E. J. Armstrong, Patrick S. Grant
Summary: High-entropy alloys (HEAs) have potential for intriguing combinations of mechanical and other properties, with focus on irradiation response such as high phase stability and resistance to radiation-induced segregation. The Cantor alloy and its derivatives exhibit encouraging irradiation resistance superior to traditional dilute alloys, showing smaller size but higher number density of dislocation loops, significantly lower extent of swelling and improved resistance to He bubble growth. Future research directions for irradiation resistant HEAs are suggested.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Physics, Applied
A. Y. Polyakov, I. V. Shchemerov, A. A. Vasilev, A. I. Kochkova, N. B. Smirnov, A. V. Chernykh, E. B. Yakimov, P. B. Lagov, Yu. S. Pavlov, E. M. Ivanov, O. G. Gorbatkova, A. S. Drenin, M. E. Letovaltseva, Minghan Xian, Fan Ren, Jihyun Kim, S. J. Pearton
Summary: The study found that 1GeV proton irradiation induced the introduction of deep donors E2*(E-c-0.75eV) and E3 (E-c-1eV) as well as deep acceptors with optical ionization threshold near 2.3eV and related ODLTS feature near 450K. However, the total concentration of all deep traps was much lower than necessary to explain the observed decrease in net donor density upon irradiation, and the proton irradiated films showed a nonuniform distribution of donor densities with concentrations greatly decreased toward the surface.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Miao He, Yang Yang, Fei Gao, Yue Fan
Summary: This study investigates the production of extended and mechanically highly consequential defects under concurrent driving forces of irradiation and stress. By using a two-temperature model and controlling mechanical loading, stress sensitivity maps for various types of irradiated dislocations are built. The mechanisms responsible for different responses/sensitivities are elucidated through tracking microstructural evolutions and scrutinizing the temporal-spatial variation of local von Mises stresses.
Article
Nuclear Science & Technology
M. Hatakeyama, T. Yamamoto, K. Yasuda, S. Matsumura, K. Yasunaga, K. Sato
Summary: The sink strengths of precipitate/matrix interfaces in Cu alloys, especially Cr-rich precipitates, were investigated using high-voltage electron microscopy. The results showed that these interfaces serve as strong sinks for point defects.
NUCLEAR MATERIALS AND ENERGY
(2022)
Article
Chemistry, Physical
Brandon K. Durant, Hadi Afshari, Satyabrata Singh, Bibhudutta Rout, Giles E. Eperon, Ian R. Sellers
Summary: The study found that mixed organic-inorganic halide perovskite solar cells show relatively high tolerance to high-energy proton radiation, and an unexpected increase in open circuit voltage and power density is observed when proton energy is increased.
ACS ENERGY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Zhengxiong Su, Tan Shi, Jinxue Yang, Huahai Shen, Zhiming Li, Sheng Wang, Guang Ran, Chenyang Lu
Summary: A design strategy based on a typical multi-principal element alloy was proposed to tune the irradiation behavior by adding interstitial carbon atoms. The results showed that the interstitial carbon atoms inhibited the growth of He bubbles and irradiation hardening, and reduced the segregation at dislocation loops. The experiments also revealed radiation-induced elemental oscillation patterns in high-entropy alloys.
Article
Materials Science, Multidisciplinary
Asmat Ullah, Muhammad Usman, Ahmer Shah, Iftikhar Ahmad, Muhammad Maqbool
Summary: Thin films of AlN:Gd were deposited on Si substrates using reactive magnetron sputtering technique in pure N atmosphere, and then irradiated by protons. The structural, electronic, optical, and electrical properties of the films were investigated before and after the irradiation. The results showed that the irradiation induced changes in the structure and enhanced the optical and electrical characteristics of the films, making them suitable for advanced electronics and optical technology.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Q. Xu, H. Q. Guan, S. S. Huang, Z. H. Zhong, H. Watanabe, M. Tokitani
Summary: The study found that the irradiation resistance of CoCrNi and CoCrFeNi medium-entropy alloys (MEA) and CoCrFeMnNi high-entropy alloy (HEA) was better than that of Ni, but the irradiation resistance of CoCrFeMnNi HEA was superior to that of CoCrNi and CoCrFeNi MEAs. In addition, significant Cr segregation occurred in CoCrNi and CoCrFeNi MEAs at 873K.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
K. V. Akshita, Dhandapani Dhanabalan, Rajendran Hariharan, Sridharan Moorthy Babu
Summary: Beta-Ga2O3 single crystals were successfully grown using OFZ technique with compressed dry air as growth atmosphere. The structural variations and optical properties of the irradiated wafers were analyzed using XRD, Raman spectroscopy, UV-Vis spectroscopy, and photoluminescence measurements. The study reveals the potential application of as-grown beta-Ga2O3 in harsh environments.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Y. L. Zhaoa, F. L. Meng, T. Yang, J. H. Luan, S. F. Liu, G. M. Yeli, W. T. Lin, W. H. Liu, X. J. Liu, C. T. Liu, J. J. Kai
Summary: In this study, a novel L1 2 -strengthened HEA alloy was irradiated with He ions, and the microstructural stability and radiation-induced segregation were investigated using TEM and APT. The results showed that the irradiated HEA exhibited improved irradiation resistance and reduced bubble size, attributed to the trapping efficiency of the precipitate/matrix interface and the interface's enhanced capability for damage elimination. The irradiation-induced diffusion and precipitation dissolution and re-precipitation also contributed to the alloy's radiation tolerance and self-healing effect.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
N. Jia, Y. Li, H. Huang, S. Chen, D. Li, Y. Dou, X. He, W. Yang, Y. Xue, K. Jin
Summary: The effects of compositional variations on helium bubble formation in refractory concentrated solid-solution alloys were investigated by irradiating TiVNbTa, TiVTa, and V alloys with 1.5 MeV He ions at 700 degrees C. The study found that bubble size, distribution, and radiation-induced segregation were influenced by the alloy composition and irradiation fluence.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Abdurrahman Ozturk, Merve Gencturk, Karim Ahmed
Summary: An elaborate study of the surface and size effects on point defects in irradiated solids reveals the presence of instability induced by surface and size effects. This instability is enhanced with increasing size, production bias, or decreasing temperature, leading to anomalies in the dependence on size. The results shed new light on the radiation tolerance of nanomaterials and have implications for the development of efficient reduced order models or the use of ion irradiation as a surrogate to neutron irradiation.
FRONTIERS IN MATERIALS
(2021)
Article
Physics, Applied
Zenghua Cai, Yuning Wu, Shiyou Chen
Summary: First-principles calculations show significant knock-on atomic displacement damage in the organic-inorganic hybrid perovskite CH3NH3PbI3, with displacement of H, C, N, and I atoms dependent on incident energy. High-energy irradiation can cause simultaneous loss of CH3NH3 and I due to knock-on displacements, which may impact experimental conclusions.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
A. Tebyani, F. B. Baalbergen, R. M. Tromp, S. J. van der Molen
Summary: Crystalline films of pentacene molecules, grown on silicon substrates in the ultrahigh vacuum chamber of a low-energy electron microscope, exhibit an increase in damage cross section with higher electron energies, ultimately transforming into a disordered carbon nanomembrane. This transformation is accompanied by a decrease in spectroscopic features, loss of definition in real-space images, and an increase in background intensity of diffraction images during irradiation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
R. G. Singh, Himanshi Gupta, R. M. Mehra, Fouran Singh
Summary: This study investigates the impact of electronic energy deposition on zinc oxide thin films grown via sol-gel method with different microstructures to tailor the photoluminescence properties induced by defects. The microstructure of the films was altered through controlled thermal annealing, while the defect nature was adjusted by swift heavy ions irradiation at varying fluences. It was found that visible emission intensity increased with annealing temperature in argon gas environment compared to oxygen environment, and ion irradiation at low fluences enhanced visible emission while reducing it at higher fluences with peak broadening. Higher ion fluences led to peak shifting towards red region, possibly due to the formation of complex defects influenced by electronic energy deposition. Intense luminescence induced by defects could be controlled by selecting proper irradiation parameters, showing potential for optoelectronic applications.
RADIATION PHYSICS AND CHEMISTRY
(2021)
