Article
Materials Science, Multidisciplinary
Z. F. Wu, Y. X. Liang, J. J. Tang, Y. F. Wang, S. L. Zhang, Q. N. Meng, Y. Yan, C. Xu, J. Wang, T. D. Shen, Y. Q. Qiao, E. G. Fu
Summary: A novel multicomponent vanadium-based alloy (MVA) was designed and irradiated, showing that the intermetallic TiNi matrix became amorphous while the VCr matrix exhibited high structural stability after ion irradiation. This study provides insights for designing new vanadium alloys with enhanced structural stability under ion irradiation.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Xiaochen Zhang, Yinzhong Shen, Mingming Zhang
Summary: The effects of irradiation on the precipitate phases in standard heat-treated CLAM (HEAT-9) steel samples were investigated. Three irradiation-induced phases were identified in the irradiated steel, namely Fe-rich M3C carbide, sigma-FeCr intermetallic compound, and Fe-Cr binary intermetallic compound.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Michael Bernhard, Nora Fuchs, Peter Presoly, Paul Angerer, Bernhard Friessnegger, Christian Bernhard
Summary: Solid-state phase transformations in the ?-loop of the binary Fe-P system were studied using differential scanning calorimetry (DSC) and high-temperature laser scanning confocal microscopy (HT-LSCM). The coupling of DSC and HT-LSCM was found to be a powerful tool to characterize ?-loops in steel for future research work. The phase boundaries and phase transformation temperatures were accurately reproduced by recently published thermodynamic optimizations, however, larger deviations were identified for the phase fraction prediction.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Multidisciplinary
Osman El-Atwani, Hyosim Kim, Jonathan G. Gigax, Cayla Harvey, Berk Aytuna, Mert Efe, Stuart A. Maloy
Summary: This study utilized large strain machining to manufacture nanostructured HT-9 steel with enhanced thermal stability and mechanical properties, demonstrating through in-situ transmission electron microscopy the thermal stability and the possibility of tuning material strength and ductility. The results suggest the potential of producing controlled nanocrystalline materials through a scalable and cost-effective method, with a need for further understanding of the morphology dependence on machining conditions.
Article
Engineering, Multidisciplinary
Xinxin Ma, Zhan Lin, Liguo Jiao, Xiaocan Liu, Jiyao Tu, Yu Lei, Junhao Zhao
Summary: We developed a seismic phase identification method by combining VMD and HT algorithms for the controlled accurate seismic source. The algorithm effectively extracted seismic phase features and outperformed the traditional matched filtering algorithm.
Article
Materials Science, Multidisciplinary
Tanvi Ajantiwalay, Lauren Nagel, Stuart Maloy, Khalid Hattar, John J. Mecholsky Jr, Assel Aitkaliyeva
Summary: This paper investigates the fracture behavior of proton-irradiated HT-9 steels using in-situ micro-tensile tests and traditional fractography methods. The study reveals that grain structure has a more profound impact on the mechanical properties of irradiated materials at lower length scales, providing valuable information for understanding the HT-9 fracture at different length scales.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Kisung Kang, Kexin Yang, Krithik Puthalath, David G. Cahill, Andre Schleife
Summary: In this paper, we use first-principles simulations to study the magneto-optical response of AFM metals under external magnetic fields. Our predictions of the spectral dependence of polar magneto-optical Kerr rotation and ellipticity allow us to attribute these effects to breaking of the magnetic symmetry. We show that tilting of magnetic moments affects the exchange interaction, while the spin-orbit interaction remains unaffected. This research provides an understanding of the polar MOKE on a band structure level and highlights the importance of the magnetic susceptibility in searching for materials with large magneto-optical response.
Article
Materials Science, Ceramics
Hongliang Zhang, Ranran Su, Izabela Szlufarska, Liqun Shi, Haiming Wen
Summary: Ti3SiC2 shows better resistance to He irradiation at high temperatures compared to room temperature, with minimal swelling and hardening effects induced by irradiation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Qun Li, Robert S. Averback, Pascal Bellon
Summary: The study investigates compositional patterning in binary alloys during energetic particle irradiation using a kinetic model that considers two competing kinetic processes. By expanding the mixing function into a series of terms, approximate kinetic models are introduced to obtain exact effective potentials and build steady-state diagrams. Higher-order models are required in the patterning regime to achieve convergence and yield concentration profiles characteristic of strong segregation regimes.
Article
Materials Science, Multidisciplinary
I. Shamsutov, O. Merkulov, M. Patrakeev
Summary: The study investigated the decrease of oxygen content and subsequent decomposition of SrFe12O19 at 750-950 degrees C through coulometric titration. It was found that the stability limits of SrFe12O19 under reducing conditions were determined, and the stepwise decomposition process showed specific characteristics of SrFe12O19. The double stepwise fall observed on oxygen content isotherms may indicate the presence of SrFe12O19 impurity.
Article
Chemistry, Physical
Yuhe Liu, Nina Ge, Kunlun Wang, Niannian Li, Hui Sun, Jean-Francois Pierson, Bo Dai, Yong Wang
Summary: This study reports the strong green photoluminescence in metastable Zr3N4 thin films with an orthorhombic structure for the first time. Notable green photoluminescence in the wavelength region of 490-535 nm has been identified in such orthorhombic Zr3N4 thin films even at room temperature. A joint experimental and theoretical study has been performed to investigate its electronic structures and to reveal the origins of such green light emissions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yuhe Liu, Nina Ge, Kunlun Wang, Niannian Li, Hui Sun, Jean-Francois Pierson, Bo Dai, Yong Wang
Summary: This study reports on the strong green photoluminescence observed in Zr3N4 thin films with an orthorhombic structure. The origins of this phenomenon have been investigated through experimental and theoretical studies, revealing the potential to solve the green gap problem in LEDs with low cost.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Saheed B. Adisa, Matthew J. Swenson
Summary: This study investigates the irradiation evolution of Si-Mn-Ni-rich nanoclusters in F/M alloys using two simulation models. The results show that the morphology of the nanoclusters after Fe2+ ion irradiation is comparable to that after neutron irradiation at a higher temperature.
Article
Materials Science, Multidisciplinary
Xiang Liu, Luca Capriotti, Tiankai Yao, Jason M. Harp, Michael T. Benson, Yachun Wang, Fei Teng, Lingfeng He
Summary: The annular metallic fuel design eliminates the liquid sodium bond between the fuel and the cladding, providing back-end fuel cycle and other benefits, presenting new features. Negligible amounts of lanthanides were found in the FCCI layer in the investigated annular fuel, with most retained in the newly formed UZr 2 phase in the fuel center region.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Ceramics
Ranran Su, Liqun Shi, John H. Perepezko, Hongliang Zhang
Summary: The effects of helium on irradiated Ti3SiC2 were studied. Concentrated helium can grow into large bubbles and induce phase transformation and chemical compositional changes.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Andrew C. Lee, Abhinav Parakh, Andrew Sleugh, Ottman A. Tertuliano, Sebastian Lam, Johanna Nelson Weker, Peter Hosemann, X. Wendy Gu
Summary: Investigation of hydrogen embrittlement mechanisms in iron using TXM, DIC, and in-situ electrochemical hydrogen charging reveals void formation and crack propagation behavior. Hydrogen charging leads to the formation of voids near the crack tip, resulting in quasi-cleavage fracture and a sharper crack tip. Plastic strain localization and reduction, as well as reduced fracture energy and elongation at failure, are observed with hydrogen charging. These findings contribute to the understanding of hydrogen embrittlement mechanisms.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Michael Wurmshuber, Simon Doppermann, Stefan Wurster, Severin Jakob, Mehdi Balooch, Markus Alfreider, Klemens Schmuck, Rishi Bodlos, Lorenz Romaner, Peter Hosemann, Helmut Clemens, Verena Maier-Kiener, Daniel Kiener
Summary: To improve the mechanical properties of tungsten, boron and hafnium were added to enhance the cohesion of grain boundaries. Small-scale testing techniques showed a significant improvement in the mechanical properties of tungsten after doping. Moreover, a low-temperature heat treatment of the boron-doped samples further enhanced the mechanical properties. This study provides an effective pathway for improving the mechanical properties of ultra-fine grained tungsten using grain boundary segregation engineering, enabling challenging applications in harsh environments.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Youxing Chen, Di Chen, Jordan Weaver, Jonathan Gigax, Yongqiang Wang, Nathan A. Mara, Saryu Fensin, Stuart A. Maloy, Amit Misra, Nan Li
Summary: Co-free but Al-included medium/high entropy alloys (M/HEAs) have attracted attention for their lower cost and the ability to tune multi-phase microstructures. In this study, the irradiation response of two Co-free HEAs, FCC CrFeMnNi and BCC AlCrFeMnNi, was explored. It was found that radiation-induced segregation and intermixing were minimal in the AlCrFeMnNi alloy, while limited voids were detected in the CrFeMnNi alloy. Additionally, the FeCrMn-rich nanoprecipitates in AlCrFeMnNi showed superior structural stability against irradiation.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hwasung Yeom, David Hoelzer, Stuart Maloy, Kumar Sridharan
Summary: The cold spray deposition process was used to manufacture 14YWT oxide-dispersion strengthened (ODS) steel with gas-atomized and ball-milled feed-stock powders. The gas-atomized powder resulted in a thick dense deposit, but annealing above 900 degrees C led to grain growth and heterogeneous precipitation, resulting in lower hardness. The ball-milled powder, after cryomilling and annealing, produced smaller particle sizes and lower hardness, suitable for cold spray deposition, resulting in thick and dense deposits with a favorable microstructure. The cold spray deposits exhibited fine grain sizes and uniform dispersion of Y-Ti-O nanoprecipitates, with hardness values of 770 HV and 496 HV.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Saleem Abdulfattah Ahmed Al Dajani, Benjamin Reid Dacus, Cody A. Denett, M. Grace Burke, Lawrence Waldron, Thak Sang Byun, James J. Wall, Kuba Bar-Din Anglin, Omar Abdulfattah Ahmed Al Dajani, Konrad J. Krakowiak, Franz. -J. Wiak, Alan Schwartzmann, C. Cem Tasan, Peter Hosemann, Michael Philip Short
Summary: Non-destructive evaluation techniques can rapidly identify the health of mission-critical nuclear reactor components by inferring material properties of interest based on measurable properties, such as surface acoustic wave peak splitting correlating with embrittlement induced by spinodal decomposition.
Article
Materials Science, Multidisciplinary
Minsung Hong, Ho Lun Chan, Yujun Xie, Elena Romanovskaia, John R. Scully, Peter Hosemann
Summary: The study investigated the effect of Te concentration in molten FLiNaK salt on the corrosion and mechanical properties of 304 stainless steel. The corrosion depth of samples decreased with increasing Te concentration after 48 h immersion at 600 degrees Celsius. Additionally, the 1.0 wt% Te sample showed less reduction in mechanical properties compared to the 0.1 wt% Te sample. It is hypothesized that a protective Cr-oxide layer is formed beneath the Ni-Fe rich layer formed by selective leaching of Cr.
Article
Engineering, Mechanical
H. T. Vo, D. Frazer, A. A. Kohnert, S. Teysseyre, S. Fensin, P. Hosemann
Summary: Radiation damage leads to various defects in structural materials depending on irradiation conditions. Irradiation-induced loops and void formation are common types of defects. This study used microscale bicrystal testing to evaluate the effects of low-level void swelling on dislocation-channel suppression and intergranular cracking in neutron-irradiated stainless steel. The results demonstrated the direct observation of the suppression of dislocation-channel and intergranular cracking in the presence of low-level void swelling.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Physics, Applied
R. Auguste, M. O. Liedke, M. Butterling, B. P. Uberuaga, F. A. Selim, A. Wagner, P. Hosemann
Summary: Radiation-induced property changes in materials are caused by energy transfer from incoming particles to the lattice, leading to atom displacement and the formation of extended defects. The extent of these defects depends on dose rate, material, and temperature. This study provides direct experimental evidence of non-equilibrium vacancy formation in silicon through in situ positron annihilation spectroscopy.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Green & Sustainable Science & Technology
Grittima Kongprawes, Doonyapong Wongsawaeng, Peter Hosemann, Kanokwan Ngaosuwan, Worapon Kiatkittipong, Suttichai Assabumrungrat
Summary: Catalytic-free parallel-plate-type dielectric barrier discharge (DBD) plasma was used to hydrogenate palm oil using glycerol as a hydrogen donor, resulting in enhanced oxidation stability of hydrogenated fatty acid methyl ester (H-FAME). Optimal reaction conditions were determined, and it was found that plasma effectively extracted hydrogen radicals from glycerol and reacted with C-C bonds. The hydrogenated palm oil was then converted into HFAME via base-catalyzed transesterification. The developed plasma hydrogenation process adds value to waste glycerol and provides alternative hydrogen sources, while also being environmentally friendly.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Multidisciplinary
A. Dong, H. Vo, E. Olivas, J. Bickel, C. Hardie, P. Hosemann, S. Maloy
Summary: Small scale mechanical testing has gained attention for materials research, but extending the results to larger scale applications remains difficult. This study tested different materials and thicknesses, revealing significant reductions in material properties at smaller thicknesses. The changes varied across materials and indicated the coupling of geometric and microstructural effects. Finite element analysis revealed potential flaws in using certain sample geometries for extreme aspect ratios, and there were discrepancies in values at different length scales.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
S. Samuha, J. Bickel, T. Mukherjee, T. DebRoy, T. J. Lienert, S. A. Maloy, C. R. Lear, P. Hosemann
Summary: The grade 91 ferritic/martensitic steel was fabricated using the Directed Energy Deposition Laser technique, which allows for tailoring of the mechanical properties by controlling the microstructure. The microstructure consists primarily of fine and coarsened lath-type martensite grains, with up to 15% d-phase observed at the melt pool boundaries. Changes in metallurgical pores and softening were explained by phase composition, grain-like size effects, and dislocation density.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
H. T. Vo, S. Pal, N. Almirall, S. Tumey, G. R. Odette, S. A. Maloy, P. Hosemann
Summary: Nickel-based alloys have excellent mechanical properties and corrosion resistance, making them suitable for various applications in extreme environments. This study shows that heavy ion irradiation disrupts the precipitates in Inconel 718 nickel-based alloy through disordering and dissolution processes. The rate of disordering and dissolution of the precipitates is proportional to both irradiation dose and dose rate. Radiation-induced disordering occurs at a higher rate than dissolution. Microscale mechanical results suggest that radiation-induced disordering is responsible for the majority of the softening response at low dose. Low dose radiation-induced disordering also results in strain localization and is believed to be the primary cause for the drastic degradation of uniform elongation and toughness in irradiated Inconel 718.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Minsung Hong, Ho Lun Chan, John R. Scully, Peter Hosemann
Summary: The corrosion properties of Alloy 625 in molten FLiNaK salt were studied at 700 degrees C as a function of tellurium concentrations. It was found that under specific tellurium concentrations, tellurium-induced corrosion can be suppressed and protect the alloy against corrosion. The sample with 0.1 wt.% tellurium showed the lowest corrosion depth and mass loss, with the highest charge transfer resistance.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Diyi Cheng, Thomas Wynn, Bingyu Lu, Maxwell Marple, Bing Han, Ryosuke Shimizu, Bhagath Sreenarayanan, Jeffery Bickel, Peter Hosemann, Yangyuchen Yang, Han Nguyen, Weikang Li, Guomin Zhu, Minghao Zhang, Ying Shirley Meng
Summary: We report a method to synthesize free-standing lithium phosphorus oxynitride (LiPON) with remarkable flexibility and Young's modulus of ~33 GPa. Our study reveals the chemistry of the Li/LiPON interface and a well-defined glass-transition temperature of LiPON at 207 °C. The free-standing LiPON film enables the study of fundamental properties for interface engineering in solid-state batteries.
NATURE NANOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Liuming Wei, Jingwen Li, Yonggang Li, Qirong Zheng, Fan Cheng, Chuanguo Zhang, Jingyu Li, Gaofeng Zhao, Zhi Zeng
Summary: This study investigates the influence of He-V complexes on H behaviors on different W surfaces using DFT calculations. The results show that H dissolution is most difficult but H trapping is easiest on the W (110) surface, while the opposite is true on the W (111) surface. Moreover, the presence of He-V complexes increases the difficulty of H diffusion from bulk to surface and desorption.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yan Meng, Song Zeng, Chen Chen, Chaowen Zhu, Huahai Shen, Xiaosong Zhou, Xiaochun Han
Summary: The characteristics of magnetron sputtered Cr coatings vary with different temperature, bias voltage, and pressure. Coatings with random orientation, good crystallinity, and small grain size exhibit favorable oxidation behavior, while coatings with strong (200) texture, poor crystallinity, and large grains have many intrinsic defects that are detrimental to the protection property of the Cr coatings.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xinyuan Xu, Zefeng Yu, Wei-Ying Chen, Aiping Chen, Arthur Motta, Xing Wang
Summary: This study presents an automated approach for characterizing grain morphology in TEM images recorded during ion irradiation. By combining a machine learning model and a computer vision algorithm, comparable results to human analysis can be achieved with significantly reduced analysis time. Researchers can train their own models following the procedures described in this study to automate grain morphology analysis of their own TEM images.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Shihao Wu, Dong Wang, Yapei Zhang, Koji Okamoto, Marco Pellegrini, Wenxi Tian, Suizheng Qiu, G. H. Su
Summary: The oxidation and degradation mechanisms of Cr coating on Zr alloy cladding under high temperature steam atmosphere are summarized, and a mathematical analysis model is established to predict the changes in coating thickness. The model is applied in the analysis of structure evolution under different conditions.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
V. Diaz-Mena, J. de Prado, M. Roldan, I. Izaguirre, M. Sanchez, M. Rieth, A. Urena
Summary: The brazeability of a cupronickel alloy was evaluated as a filler alloy for high-temperature joining of tungsten to steel. The study investigated the brazing conditions and the impact of the selected filler on the joint quality using numerical software. The results showed different metallurgical interactions and diffusion phenomena between the filler alloy and the base materials at different temperatures. The study emphasized the importance of selecting a suitable filler to mitigate residual stresses in the joints.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Pengcheng Zhu, Yajie Zhao, Yan-Ru Lin, Jean Henry, Steven J. Zinkle
Summary: This study investigates the effect of heavy-ion irradiation on radiation hardening in high-purity binary alloy Fe18Cr. Nanoindentation testing and high-quality TEM imaging were conducted to extract hardness and microstructure information. The strength factor was accurately calculated based on the detailed TEM characterization of irradiated microstructures, and a refined hardening superposition method was applied to quantify the mechanical properties of ion-irradiated materials.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Bin Wu, Haixia Ning, Hanzhen Zhu, Jianjun Chen, Kang Wang, Daiyu Zhang, Fu Wang, Qilong Liao
Summary: This study discusses the effects of ZrO2 and B2O3 on the phase composition and properties of SAP-based glass-ceramics. The results show that ZrO2 addition improves the formation of NZP phase while restricting the crystallization of AlPO4 phases. The correct ratios of ZrO2 and B2O3 allow only the formation of NZP phase within the SAP glass.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Hwasung Yeom, Greg Johnson, Benjamin Maier, Tyler Dabney, Kumar Sridharan
Summary: Cr-Nb bilayer coatings were developed using cold spray deposition to improve the limiting operational temperature of Cr-coated Zr-alloy system. The coatings exhibited outstanding oxidation resistance at high temperatures and formed continuous intermetallic compound layers at the interfaces.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Padhraic L. Mulligan, Andrew T. Nelson, Chad M. Parish, Patrick A. Champlin, Xiang Chen, Daniel Morrall, Jason M. Harp
Summary: Environmental barrier coatings are being developed to reduce oxidation and embrittlement in Zr-based materials. Chromium nitride is a candidate for this application, but understanding its impact on irradiation-induced creep and microstructure is critical.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Dexuan Yan, Xinlei Cao, Ke Shen
Summary: This study investigated the purification mechanism of polycrystalline graphite by comparing IG-11 graphite with IG-110 nuclear grade graphite. The analysis revealed that metallic impurities in IG-11 were primarily segregated within graphite porosities, while IG-110 demonstrated a significant reduction in impurities. This research contributes to the development of innovative graphite purification techniques for greater purity and stronger oxidation resistance.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Wei Xu, Wei Peng, Lei Shi, Qi Sun
Summary: This paper investigates the oxidation and shape evolution of matrix graphite in high temperature gas-cooled reactors during air-ingress accidents. A reaction kinetics model is established and computational fluid dynamics with a dynamic mesh method is used to simulate the oxidation process. The results show that the geometric shape of graphite changes significantly with increasing flow rate, and the graphite pebbles tend to form a structure with a narrow front and wide tail.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Allison Harward, Casey Elliott, Michael Shaltry, Krista Carlson, Tae-Sic Yoo, Guy Fredrickson, Michael Patterson, Michael F. Simpson
Summary: This paper investigates the hygroscopic properties of eutectic LiCl-KCl absorbed into zeolite-4A. The study finds that water absorption and corrosion worsen with increasing salt loading. It also suggests that the salt can be stored in a non-inert atmosphere for a certain period of time.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Takaaki Koyanagi, Xunxiang Hu, Christian M. Petrie, Gyanender Singh, Caen Ang, Christian P. Deck, Weon-Ju Kim, Daejong Kim, James Braun, Yutai Katoh
Summary: This study provides critical experimental data on the effects of irradiation on the hermeticity of SiC composite cladding, finding that irradiation can cause a decrease in hermeticity and cracking, and coating the outer surface can mitigate the cracking issue.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
S. Krat, A. Prishvitsyn, Yu. Gasparyan
Summary: This study proposes a probabilistic and diffusion-based model to describe the co-deposition of multiple hydrogen isotopes with slowly grown metal layers. The model calculates the relative concentrations of different hydrogen isotopes in the co-deposited metal layers. It is found that if hydrogen isotopes have different detrapping energies, only the isotope with the highest detrapping energy shows a monotonic decrease in concentration with deposition temperature. Furthermore, the study evaluates the uncertainty of tritium concentration in the co-deposited layer based on the uncertainty in detrapping energy of tritium and deuterium, predicting a >10% tritium concentration uncertainty for a 0.01 eV difference.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Tijo Vazhappilly, Arup Kumar Pathak
Summary: This study investigates the effect of Ce atom substitution in UO2 on its thermophysical properties using density functional theory. The results show that the Ce substitution levels and the oxidation state of Ce/U atoms strongly influence the band structure and specific heat capacity of the UO2 lattice. These findings provide important insights into the fuel properties of UO2 under reactor conditions.
JOURNAL OF NUCLEAR MATERIALS
(2024)
