Article
Materials Science, Multidisciplinary
Yang Liu, Said El Chamaa, Mark R. Wenman, Catrin M. Davies, Fionn P. E. Dunne
Summary: By combining experimental and modeling approaches, the study investigated hydride formation in Zircaloy-4 under cyclic thermomechanical loading. It was found that strain rate sensitivity and hydrogen concentration play important roles in controlling the distribution of hydrides.
Article
Materials Science, Multidisciplinary
Senmao Liang, Shengjie Wang, Dayong An, Fengqiang Ma, Yuxiao Jia, Xian-Zong Wang, Shilei Li, Weijia Gong, Yandong Wang
Summary: Hydrides play a crucial role in the mechanical degradation of Zr-based nuclear fuel cladding. This study investigates hydride precipitation in a hydrogenated Zircaloy-4 plate through thermo-mechanical treatment. The results provide insights into the interactions between external stress, hydride strain, and hydride reorientation.
Article
Materials Science, Multidisciplinary
Yu-Jie Jia, Irene J. Beyerlein, Wei-Zhong Han
Summary: Electrolytic hydrogen charging was used to synthesize Zr samples with different subsurface hydride aging times, and transmission electron microscopy was employed to study the mechanisms of hydride precipitation in pure Zr. The formation of hydrides involves isolated nucleation followed by coalescence, with the shape of the hydride bump depending on the angle between the basal plane and the sample surface. The orientation of the basal plane plays a crucial role in the formation of intragranular and intergranular subsurface hydrides.
Article
Engineering, Multidisciplinary
Vikram Roy, S. Chatterjee, P. Halder, N. K. Maheshwari
Summary: This study investigates the effects of overextension of rollers on residual tensile stresses in the transition region of rolled joints. The results suggest an optimal roller position that minimizes residual tensile stresses and reveal that deviations within a 5mm range have a negligible impact on residual tensile stress.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2023)
Article
Chemistry, Physical
Hari P. Paudel, Ting Jia, Wissam A. Saidi, David J. Senor, Andrew M. Casella, Yuhua Duan
Summary: Zirconium alloys have the ability to capture and convert tritium, making them ideal materials for tritium-producing burnable absorber rods. This study used first-principles calculations to investigate the diffusion mechanism of tritium in pure and impure zirconium alloys containing low concentrations of tin. The presence of tin impurity was found to significantly reduce the diffusivity of tritium. The results provide valuable insights for further experimental investigations in nuclear technology.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Alexander V. Barashev, Qiang Zhao, Qingyu Wang, Qiang Yan, Fei Gao
Summary: This study investigates the formation of delta hydrides in zirconium cladding under radiation and thermal aging conditions through rate theory modeling. The preferential nucleation of platelet-shaped hydrides on grain boundaries was observed, and the importance of this modification in the precipitation model was analyzed. Comparisons of different approaches were made to understand the factors affecting hydride formation in the clad.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Navid Attarzadeh, Chintalapalle V. Ramana
Summary: Recent research has focused on designing ceramic coatings for zirconium-based substrates with excellent surface properties for modern technologies. The Plasma Electrolytic Oxidation (PEO) coating is an environmentally friendly wet coating method that can be tailored by changing parameters, electrolyte composition, and substrate alloying elements to meet various industry demands. The review emphasizes understanding PEO growth mechanisms and the impact of process parameters on oxide layer formation and microstructural properties for applications in chemical, electronics, and energy technologies.
Article
Materials Science, Multidisciplinary
Weijia Gong, Pavel Trtik, Fengqiang Ma, Yuxiao Jia, Jinshan Li, Johannes Bertsch
Summary: This study investigates the response of hydrogen diffusion and hydride precipitation in an unirradiated duplex cladding to thermo-mechanical cycles using high-resolution neutron imaging. The results demonstrate that the material heterogeneity is the main driving force for hydrogen diffusion, while external stress only contributes locally to hydrogen field variation. Hydride precipitation is significantly restrained in the compressed area.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
I. A. Khan, A. C. F. Cocks, J. Chattopadhyay
Summary: This study investigates the precipitation process and mechanism of hydrogen in zirconium-based alloys, analyzing the role of elastic mismatch in controlling the morphology and orientation of hydride precipitates. The research findings show that under external stress, hydride precipitates tend to reorient, but the strong anisotropy in interfacial energy causes them to remain parallel to the basal plane.
MECHANICS OF MATERIALS
(2021)
Article
Materials Science, Coatings & Films
Dongju Kim, Youho Lee
Summary: A mechanistic model based on Finite Difference Method (FDM) has been developed and validated to calculate Cr diffusion for Cr-coated Zircaloy cladding. The model has been incorporated into TRANOX 2.0. Experimental data was used to obtain chromium diffusion coefficients for each phase of the multilayered Cr-coated cladding. Extensive high temperature annealing experiments in the range of 1000-1300 degrees C confirmed the accuracy of the model predictions by comparing them with Cr distribution measured by EPMA. The developed model can predict diffusional loss coating thickness of Cr-coated Accident Tolerant Fuel.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Akio Ishii
Summary: In this study, the nucleation process of Zr hydrides was investigated using density functional theory calculations and minimum energy path detection. The findings show that, although ZrH and ZrH2 are more energetically stable than Zr4H and Zr2H at 0K, the latter have lower activation energies for nucleation. At finite temperatures, ZrH becomes the most possible candidate with the lowest activation energy.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Polymer Science
Slawomir Rubinsztajn, Julian Chojnowski, Urszula Mizerska, Malgorzata Basko, Pawel Uznanski, Agnieszka Walkiewicz-Pietrzykowska, Marek Cypryk
Summary: The reaction between poly(hydromethylsiloxane-co-methylphenylsiloxane) and zirconium (IV) n-propoxide in dry toluene results in the formation of a siloxane-zirconium composite. The post-reaction solution containing heterosiloxane oligomers is stable under anhydrous conditions, but exposure to moisture leads to cross-linking and the formation of thin films with excellent light transparency and increased refractive index. The coatings are characterized using ellipsometry, UV-Vis, IR, and Si-29 MAS NMR spectroscopies.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Igor J. S. Cherubin, Fei R. Long, Mark Daymond
Summary: The mechanical properties of delta-zirconium hydrides were investigated using nanoindentation techniques and numerical models. The results showed that the hardness decreased linearly with increasing temperature, and the yield stress was calculated for different forms of the hydrides at room temperature and elevated temperatures.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Igor J. S. Cherubin, Matthew Topping, Mark R. Daymond
Summary: This study investigates the mechanical properties of hydrided and non-hydrided materials under proton irradiation. The results show an increase in true hardness and yield strength due to irradiation hardening. The defect density evolution varies in the two materials at different dpa levels.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Igor J. S. Cherubin, Matthew Topping, Fei Long, Mark R. Daymond
Summary: The deformation characteristics of 8-zirconium hydrides grown on a Zr2.5Nb alloy were investigated through micro compression tests. Plastic deformation was observed based on the stress-strain curves obtained from the compression tests. Transmission electron microscopy revealed the presence of dislocations consistent with the common { 111 } < 110 > FCC slip system using focused-ion beam cross-section analysis of the deformed 8-zirconium hydride micropillar.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Zheng Wang, Xiaoming Shi, Xu-Sheng Yang, Wangqiang He, San-Qiang Shi, Xingqiao Ma
Summary: This study investigates deformation-induced martensitic transformations (DIMTs) in a-Fe single crystal during mode-I fracture process using molecular dynamics simulation and first-principle calculations. The formation of c (fcc) phase near the crack tip leads to quasi-cleavage fracture, which is verified to be close to experimental results. The results highlight the relationship between fractures and DIMTs in iron and ferroalloys under mechanical loading conditions.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Engineering, Environmental
Zhihua Xiao, Lu Zhao, Zhiqing Yu, Mengxuan Zhang, Shengping Li, Ronghua Zhang, Mudassar Ayub, Xinlong Ma, Guoqing Ning, Chunming Xu
Summary: By utilizing O-doping multilayered porous graphene, an all-graphene symmetric Lithium-ion capacitor with high energy and power density was constructed, showing excellent electro-chemical properties and great potential for next-generation energy storage devices.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Jiaqiang Li, Yuyang Yi, Xintao Zuo, Bingbing Hu, Zhihua Xiao, Ruqian Lian, Ya Kong, Lianming Tong, Ruiwen Shao, Jingyu Sun, Jin Zhang
Summary: In this study, a GDY/Gr/GDY sandwiched architecture was designed to improve the K-ion storage performance. Experimental results showed that the GDY/Gr/GDY electrode exhibited better capacity output and cyclic stability. In situ testing revealed the reversibility of the GDY/Gr/GDY electrode. A full-cell device demonstrated the potential of the GDY/Gr/GDY anode for K-ion batteries.
Article
Chemistry, Physical
Chuanlei Qi, Shengping Li, Zipan Yang, Zhihua Xiao, Lu Zhao, Fan Yang, Guoqing Ning, Xinlong Ma, Chengxiu Wang, Jun Xu, Jinsen Gao
Summary: In this study, core-shell nanostructured Si@C materials with different thickness of carbon coating were prepared using chemical vapor deposition. The Si@C composite with 2-3 carbon coating layers exhibited excellent electrical conductivity and strong mechanical strength, which helped to buffer the volume expansion of silicon nanoparticles.
Article
Chemistry, Multidisciplinary
Jiaqiang Li, Yeye Wen, Zhihua Xiao, Shijun Wang, Lixiang Zhong, Tao Li, Kun Jiao, Lanying Li, Jiajun Luo, Zhenfei Gao, Shuzhou Li, Zhong Zhang, Jin Zhang
Summary: Poly(p-phenylene-benzimidazole-terephthalamide) (PBIA) fibers are a kind of heterocyclic aramid fibers with exceptional mechanical properties and various applications. This study develops a novel HrGO/PBIA composite fiber with a scaffolded structure, in which a small amount of HrGO effectively enhances the mechanical properties and environmental compatibility of PBIA fibers by improving the crystallinity and lateral interaction of PBIA chains.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Chemical
Lu Zhao, Dong Sun, Qi Cao, Zhihua Xiao, Zhiqing Yu, Chuanlei Qi, Xingxun Li, Guoqing Ning, Xinlong Ma, Chong Peng, Jinsen Gao, Xiaoqiao Huang
Summary: This study develops a scalable, green and universal S doping methodology for arbitrary carbon materials, achieving excellent performance in lithium ion capacitors (LIC), especially exhibiting outstanding rate capability and durability even in low-temperature environments.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Zhihua Xiao, Zhiqing Yu, Zhenfei Gao, Bofeng Li, Mengxuan Zhang, Chunming Xu
Summary: In this study, S-doped graphene nano-capsules (SGCs) were designed as both the anode and cathode in lithium-ion capacitors (LICs). The SGCs exhibited excellent electrochemical performance and cycling stability at both room temperature and low temperature, suggesting their potential for future energy storage applications.
JOURNAL OF POWER SOURCES
(2022)
Article
Computer Science, Information Systems
Yanyi Li, Jian Shi, Zhihua Xiao
Summary: This study uses mobile three-dimensional laser scanning technology to collect point cloud data inside a tunnel and proposes a multilayer tunnel point cloud classification method. The method accurately extracts ground objects inside the tunnel, and it has high classification accuracy and robustness.
MOBILE INFORMATION SYSTEMS
(2022)
Article
Materials Science, Composites
Zhihua Xiao, Guili Li, Chunxiao Liu, Haimei Li, Jun Lin
Summary: In this study, the use of carbon nanotubes (CNTs) to modify poly(lactic acid) (PLA)/poly(butylene-adipate-co-terephthalate) (PBAT) blends was investigated. The distribution of CNTs in the PBAT phase and its effects on the morphology and mechanical properties of the composites were characterized and discussed.
POLYMER COMPOSITES
(2022)
Article
Chemistry, Applied
Dong Sun, Lu Zhao, Zhihua Xiao, Kai Zhao, Rundan Lin, Hongmei Song, Xilu Zhang, Xinlong Ma, Chong Peng, Xiaoqiao Huang, Xingxun Li, Jinsen Gao, Chunming Xu
Summary: The mildly expanded graphitized needle coke (MEGNC) obtained through a two-step mild oxidation intercalation modification method has shown improved voltage plateau width and enhanced lithium storage capacity at low voltages. The coin full cell and pouch full cell configured with MEGNC anode exhibited superior lithium storage ability, energy density, and cycling stability compared to those configured with GNC and commercial graphite anodes. The enlarged interlayer spacing in MEGNC contributed to increased effective capacity, accelerated lithium ion diffusion rate, and reduced volume expansion and fragmentation during the intercalation process.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Jiajun Luo, Yeye Wen, Xiangzheng Jia, Xudong Lei, Zhenfei Gao, Muqiang Jian, Zhihua Xiao, Lanying Li, Jiangwei Zhang, Tao Li, Hongliang Dong, Xianqian Wu, Enlai Gao, Kun Jiao, Jin Zhang
Summary: In this research, the authors polymerize carbon nanotubes into aramid fibers to simultaneously improve strength and toughness. The synthetic high-performance fibers have excellent mechanical properties and promising applications in the impact protection field.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Mengxuan Zhang, Lu Zhao, Dong Sun, Yankun Sun, Chunming Xu, Shichao Lu, Tao Li, Yongfeng Li, Zhihua Xiao
Summary: By using S-doped multiwalled carbon nanotubes (SCNTs) as a conductive additive and constructing a scaffolded framework, the poor electronical conductivity and large volume change of the nano-silicon anode are successfully addressed. The Si@C-5SCNTs anode with 5 wt% SCNTs exhibits a significantly higher specific capacity of 939 mA h g-1 at 2 A g-1 within 0-1 V, surpassing Si@C (466 mA h g-1) and Si@C-5CNTs (720 mA h g-1), demonstrating superior rate performance. Moreover, it shows better initial coulombic efficiency, Li-ion diffusion coefficient, cycling performance, and smaller volume change compared to Si@C and Si@C-CNTs at both room and high temperatures.
APPLIED SURFACE SCIENCE
(2023)
Article
Energy & Fuels
Bofeng Li, Zhihua Xiao, Yanting Cao, Zhiqing Yu, Yankun Sun, Zechen Li, Yuxian Wang, Zhenfei Gao, Chunming Xu
Summary: In this study, a novel reduced graphene oxide/porous carbon composite was synthesized by compressing graphene oxide, activated carbon, and asphalt into a cubic embryo and then using a confinement-region activation strategy. This material exhibited high specific surface areas, abundant mesoporous volume, good hydrophilicity, and high conductivity, resulting in a large desalination capacity. Additionally, density functional theory models of carbon materials with different pore sizes were used to analyze the effect of pore size on saline ions adsorption capacity, showing that a larger pore size led to better ion adsorption ability. This study provides a unique activation strategy for designing high-performance capacitive deionization devices.
Article
Energy & Fuels
Zhiqing Yu, Xiaohan Wang, Haoran Liu, Wenbin Huang, Kaixin Deng, Xiaoyue Liu, Zhihua Xiao, Qiang Wei, Yasong Zhou
Summary: By modifying the cube MgO with different weight percent of activated carbon, the introduction of non-homogeneous carbon layers can increase the number of stacking layers of MoS2 and shorten its length, which is beneficial for the formation of type II CoMoS active phase. The highest HDS conversion rate of 84.71% was achieved over the CoMo/M@AC-0.2 catalyst at 300℃ and 8 h-1 conditions, which was 32.78% higher than that of the CoMo/Al2O3 catalyst.
Article
Computer Science, Information Systems
Rongtao Liao, Zhihua Xiao, Yixi Wang, Dangdang Dai
Summary: This paper proposes a low rank model based security monitoring method for power internet of things sensor nodes to address the low precision and recall issue in the current security monitoring results. The method constructs a security monitoring platform and designs an adaptive sensing mechanism, achieving adaptive recognition of sensor node data. The experimental results demonstrate that the method has high accuracy, recall, and reliability in anomaly detection.
INTERNATIONAL JOURNAL OF AUTONOMOUS AND ADAPTIVE COMMUNICATIONS SYSTEMS
(2022)
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)
