Article
Polymer Science
Benjamin Zanghellini, Patrick Knaack, Sebastian Schoerpf, Karl-Heinz Semlitsch, Helga C. Lichtenegger, Bernhard Praher, Maria Omastova, Harald Rennhofer
Summary: The dispersion of carbon nanotubes and carbon nanofibers is a crucial step in the production of polymer-based nanocomposites, and it is a challenge due to the tendency of nanofillers to agglomerate. While the three-roll mill is an effective method for dispersion, it is time-consuming and limits industrial applications. The study aimed to establish an efficient ultrasonic dispersion process and compare it with the three-roll mill method, using rheological tests and image analysis to characterize dispersion quality and improve the process.
Article
Physics, Multidisciplinary
Mehdi Derradji, Oussama Mehelli, Raouf Belgacemi, Slimane Abdous
Summary: A new hybrid composite was developed for the development of advanced lightweight thermal and ballistic neutrons shields. The composite, made from Kevlar fibers, epoxy, and boron carbide particles, showed high shielding efficiency, with the best performance observed at 20% B4C content.
FRONTIERS IN PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Oussama Mehelli, Mehdi Derradji, Raouf Belgacemi, Slimane Abdous, Abdelmalek Habes, Wenbin Liu
Summary: Researchers developed a new hybrid composite material for advanced and lightweight thermal neutrons shields, consisting of UHMWPE fibers, epoxy, and boron carbide particles. Neutron shielding tests showed remarkable performances, with the best results achieved at a B4C content of 20 wt%, displaying a macroscopic cross-section (sigma) of 0.313 cm-1 and a mean free path (lambda) of 2.2 cm.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Chemistry, Physical
Mengge Dong, Suying Zhou, Changcheng Ge, He Yang, Mao Liu, G. Lakshminarayana, Xiangxin Xue
Summary: The complex composition of ludwigite poses challenges for its comprehensive utilization. However, by preparing epoxy resin matrix nuclear shielding composites at room temperature, ludwigite can be used in a green and low-carbon manner to achieve efficient shielding of neutron and gamma-ray sources.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Chemistry, Physical
Oussama Mehelli, Mehdi Derradji, Raouf Belgacemi, Slimane Abdous
Summary: A new hybrid composite consisting of Ultra High Molecular Weight Polyethylene fibers, epoxy, and boron carbide particles was developed for designing wearable and lightweight protective thermal neutron shields. The hybrid composite achieved both high shielding performance and overall mechanical behavior. Experimental results demonstrated the high shielding efficiency of the developed materials, with the optimal performance achieved at a B4C particle content of 10 wt%.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
F. N. Alhabill, A. S. Vaughan, T. Andritsch
Summary: The study examines the interactions between amorphous silicon nitride (Si3N4) nanofiller and an epoxy resin matrix, revealing that the processing protocol details critically affect the ultimate properties of Si3N4/epoxy nanocomposites. By controlled calcination of Si3N4, it is possible to adjust the initial surface chemistry of nanoparticles and modify their reactivity with epoxy-containing moieties.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Physical
A. A. Abdelmalik, Y. M. Abubakar, M. O. Ogbodo, K. Y. Victor, H. G. Goje
Summary: The study investigated the effect of neutron irradiation on the impedance of Epoxy-TiO2 nanocomposite materials, showing that the addition of TiO2 nanoparticles can improve the insulation properties and increase impedance after irradiation. The 1 wt% nano-filled polymer exhibited the most significant increase in impedance among the tested samples.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
Lekshmi Mohan, Sunitha Karakkad, Sindhu Thiruthi Krishnan
Summary: This study fabricates lightweight carbon nanotube-based epoxy nanocomposite shields with superior shielding effectiveness in both X and Ku frequency bands. The developed shields have promising potential as broadband shields with minimal thickness, less weight, and low cost.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Applied
Amir Rezvani-Moghaddam, Zahra Ranjbar, Uttandaraman Sundararaj, Ali Jannesari, Amir Dashtdar
Summary: In this study, two different graphene nanosheets with different oxygen groups' localization were synthesized to investigate their effect on the electrical properties of graphene/epoxy nanocomposite coatings. It was found that B-GO nanosheets exhibited better performance in network formation, which can be related to the similarity of oxygen groups between B-GO and epoxy matrix. Despite the higher intrinsic electrical conductivity of E-GO compared to B-GO, the polymeric coatings containing B-GO nanosheets have higher electrical conductivity values.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Physical
A. A. Abdelmalik, M. O. Ogbodo, Y. M. Abubakar, A. I. Galadima, A. Aliyu, S. A. Jonah
Summary: This study examines the influence of neutron irradiation on the dielectric behavior of neat and nanoparticle-filled polymeric insulation materials. The results indicate that the presence of 2 wt% TiO2 nanoparticles enhances the mechanical and dielectric properties of the composite material. While the nanoparticles reduce mechanical degradation, they do not significantly affect the dielectric loss.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Physical
Qianqian Cheng, Jialin Chen, Gewen Yi, Yu Shan, Yushan Geng, Juyang Wang, Wenzhen Wang
Summary: Mechanical alloying with high-energy ball milling is used to prepare high-entropy alloy (HEA) matrix nanocomposite powders with tungsten carbide (WC) particles. The repeated plastic deformation, fracture, and cold welding of the HEA powder result in the transformation from a body-centered cubic (BCC) phase to a face-centered cubic (FCC) phase and the gradual dispersion of WC microfine powder in the HEA matrix. The final product is a biphasic HEA-matrix WC nanocomposite spherical powder.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Gopichand Dirisenapu, Lingaraju Dumpala, Seelam Pichi Reddy
Summary: In this study, Al7010/B4C/BN hybrid metal matrix nanocomposites with varying weight percentages of B4C and BN nanoparticles were prepared using ultrasonic-assisted stir casting technique. The addition of nanoparticles led to increased wear resistance and decreased friction coefficient, while the wear rate and friction coefficient increased with normal load and sliding speed. Scanning electron microscope images showed uniform dispersion of reinforcement particles, with adhesion, plowing behavior at low loads, and delamination at higher loads observed on wear specimens.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2021)
Article
Construction & Building Technology
Shaik Inayath Basha, Md. Abdul Aziz, Shamsad Ahmad, Mesfer M. Al-Zahrani, Mohammed Shameem, Mohammed Maslehuddin
Summary: This paper presents the effectiveness of epoxy resin coatings modified with heavy fuel oil ash (HFOA) submicron/nano (S/N) carbon particles in enhancing concrete durability. The experimental data demonstrated that the performance of composite coating with 1% of S/N carbon was the best in resisting the chloride ions penetration, acid and sulfate attacks, and for increasing the bond strength.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Multidisciplinary Sciences
Sedigheh Ranjkesh Adarmanabadi, Mohammad Jafari, Seyyed Mahdi Hosseini Farrash, Mehdi Heidari
Summary: This study investigated the effects of different nanoparticles as reinforcement in a polymeric matrix on the mechanical and tribological properties of the composite. Results showed significant changes in mechanical properties compared to the epoxy matrix, with the combination of NC and NGO improving the mechanical properties. Additionally, adding NC to NG/epoxy composite increased fracture toughness and ultimate tensile strength.
Article
Materials Science, Multidisciplinary
Seham K. Abdel-Aal, Anatolii Beskrovnyi, Andrey M. Ionov, Rais N. Mozhchil, Ahmed S. Abdel-Rahman
Summary: A graphene nanocomposite of CuO-rGO was synthesized through a simple precipitation reaction, which confirmed the reduction of graphene oxide and the formation of CuO-rGO. CuO nanocrystals were found to be uniformly distributed on graphene sheets. Characterization by various techniques, including XRD and XPS, indicated the formation of a single phase of CuO monoclinic crystal system.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Ceramics
Yun-Gi Jeong, Gyoung-Ja Lee, Sang-Hyeop Lee, Hee-Seung Ma, Byung-Hoon Kim, Kyu-Hyun Park, Jin-Ju Park, Kyubock Lee, Min-Ku Lee
Summary: The effect of Nb/Ta donor doping on the piezoelectricity, thermal stability, and fatigue resistance of bismuth titanate ceramics was studied. It was found that increasing the doping amount reduced the concentration of oxygen vacancies and improved the electrical insulating properties, resulting in enhanced piezoelectric performance. The Nb/Ta-doped ceramics exhibited superior thermal aging stability and fatigue resistance.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Jungkuk Lee, Hengzhou Liu, Yifu Chen, Wenzhen Li
Summary: In this study, a simple surfactant-free method was developed to prepare Bi2O3-derived BiNSs (OD-BiNSs) for electrochemical CO2 reduction. The in situ morphology transformation from Bi2O3 to BiNSs was observed during cyclic voltammetry. The prepared OD-BiNSs exhibited high faradic efficiency for formate production in both H-cell and flow cell setups.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Multidisciplinary
Dong Yeol Hyeon, Gyoung-Ja Lee, Sang-Hyeop Lee, Jin-Ju Park, Seoha Kim, Min-Ku Lee, Kwi-Il Park
Summary: This study reports high-temperature and flexible composite-based piezoelectric energy harvesters, which achieve high-performance energy harvesting by using ceramic particles with different compositions and a polyimide matrix material. The measurement results show that the piezoelectric energy harvester with 0.0025BS-doped ceramic particles exhibits better electrical outputs over all temperature ranges. The theoretical and quantitative analysis also confirms the superiority of 0.0025BS in fabricating high-temperature piezoelectric energy harvesters.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Ceramics
Min-Ku Lee, Byung-Hoon Kim, Gyoung-Ja Lee
Summary: This study reports an enhanced piezoelectric accelerometer based on lead-free materials, with improved voltage sensitivity by optimizing the high piezoelectric voltage constant g(33). By effectively manipulating the additive elements in the KNN material, the best coupling of the piezoelectric charge constant d(33) and dielectric permittivity ε(r) was achieved. The resulting accelerometer prototype demonstrated higher voltage sensitivity when measuring vibrations, compared to a PZT-based sensor.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Environmental
Jungkuk Lee, Junjie Chen, Kevin Giewont, Tala Mon, Chih-Han Liu, Eric A. Walker, Eleni A. Kyriakidou
Summary: Bimetallic PdCo/BEA zeolites can serve as potential passive NOx adsorbers, stabilizing Pd2+ adsorption sites and enhancing NOx desorption.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Jungkuk Lee, Hengzhou Liu, Wenzhen Li
Summary: The direct conversion of bicarbonate to multicarbon products has been achieved by using rationally designed Cu/Ag bilayer electrodes and bilayer cation- and anion-conducting ionomers. By optimizing the electrode structure and creating a suitable microenvironment, the conversion efficiency of bicarbonate to multicarbon products can be improved and the hydrogen evolution reaction can be suppressed.
Article
Chemistry, Physical
Hengzhou Liu, Deep M. Patel, Yifu Chen, Jungkuk Lee, Ting-Han Lee, Sarah D. Cady, Eric W. Cochran, Luke T. Roling, Wenzhen Li
Summary: By studying the reduction of biomass-derived compounds on Pb electrodes under acid conditions, researchers have gained insights into the mechanistic understanding of product formation pathways. The source of protons and the surface properties play critical roles in determining the hydrogenation and hydrogenolysis pathways, leading to the formation of different products. Modifying the double layer structure allows for control over the interfacial environments and product selectivity.
Article
Chemistry, Multidisciplinary
Sung Cheol Park, Chaeyoung Nam, Changyeon Baek, Min-Ku Lee, Gyoung-Ja Lee, Kwi-Il Park
Summary: In this study, high-efficiency ultra-flexible piezoelectric energy harvesters (f-PEHs) were developed using electrospun piezoelectric composite fiber (PCF) membranes. These f-PEHs showed higher output voltage and power compared to previous PCF-based energy harvesters. Additionally, a successful application in monitoring small bio-signals was achieved using an ultra-flexible f-PEH system. This study provides suggestions for wearable and biomedical self-powered electronics using piezoelectric energy-harvesting systems.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Kyu-Hyun Park, Gyoung-Ja Lee, Sang-Don Bu, Min-Ku Lee
Summary: In this study, BFO-BTO ceramics with excellent ferroelectric and piezoelectric properties were obtained by controlling the calcination temperature. The optimal calcination temperature resulted in the formation of low defect levels, large grain size, and an appropriate morphotropic phase boundary, which improved the performance of the ceramics.
CURRENT APPLIED PHYSICS
(2022)
Article
Engineering, Chemical
Zahid Hanif, Ki-In Choi, Jung-Hwan Jung, Arni Gesselle M. Pornea, Eunkwang Park, Jungho Cha, Hyun-Rae Kim, Jae-Hak Choi, Jaewoo Kim
Summary: Boron nitride nanotubes (BNNTs) are used as nanofiller additives to enhance the properties of polymer composites. However, their hydrophobicity and van der Waals attraction hinder their dispersion in solvents. A deposition approach using plant-based polyphenols and amines was proposed to overcome this issue. The modified BNNTs showed improved dispersibility and interaction with the polymeric matrix, leading to enhanced composite performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Analytical
Min-Ku Lee, Byung-Hoon Kim, Gyoung-Ja Lee
Summary: Piezoelectric accelerometers were designed, fabricated, and characterized using a lead-free modified (K,Na)NbO3 (KNN) piezoceramic. The modified ceramic exhibited a beneficial rhombohedral-tetragonal (R-T) phase boundary structure with a high piezoelectric charge coefficient and Curie temperature. Finite element analysis and metamodeling techniques were used to optimize the accelerometer designs, resulting in high charge sensitivity and resonant frequency. Prototypes of the accelerometers were fabricated using the modified KNN-BNKLZ-BS ceramic, which showed excellent sensing performances with perfect linearity and broad flat frequency ranges.
Article
Nanoscience & Nanotechnology
Ki-In Choi, Dolly Yadav, Junghwan Jung, Eunkwang Park, Kyung-Min Lee, Taejin Kim, Jaewoo Kim
Summary: Parallel to CO2 emission, NOx emission has become a menacing problem that requires a simple, durable, and high-efficiency deNOx catalyst. In this study, we demonstrated the synthesis of platinum group metal nanoparticle-decorated f-BNNT as a catalyst for efficient and selective reduction of NO by CO at low temperatures. The catalyst showed high removal efficiencies of NO and CO, with NO catalytic reduction >99% at temperatures as low as 200 degrees C. The catalyst's robustness and efficiency were also verified through aging tests. The use of the noble metal nanoparticle-decorated f-BNNT catalysts can potentially save expensive PGM catalysts while maintaining similar or better catalytic performance for simultaneous NO and CO removals.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Dong-Seop Kim, Byoung-Min Lee, Hyun-Rae Kim, Sangwon Park, Jong-Seok Park, Daeyoung Hwang, Jaewoo Kim, Jae-Hak Choi
Summary: This study investigates the effects of clays and electron beam irradiation (EBI) on the properties of poly(ethylene-co-vinyl acetate) (EVA)/high-density polyethylene (HDPE)/aluminum hydroxide (ATH)/clays composites. The addition of clays and the formation of crosslinked network structures by EBI prove to be effective in improving the physical properties and flame retardancy of the composites.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Arni Gesselle M. Pornea, Ki-In Choi, Jung-Hwan Jung, Zahid Hanif, Cheolwoo Kwak, Jaewoo Kim
Summary: In this research article, a PDMS-based composite with a ternary filler system consisting of Al2O3, h-BN, and BNNT was proposed to construct a continuous 3D structure for thermal attenuation. The structured framework achieved a significant improvement in isotropic thermal conductivity, with h-BN ensuring uniform heat distribution and BNNT constructing a connecting phonon pathway. The generated ternary filler composites demonstrated a 36-fold increase in thermal conductivity compared to neat PDMS resin, suggesting potential applications in heat dissipation and design of polymeric composites.
Article
Chemistry, Multidisciplinary
Hengzhou Liu, Naveen Agrawal, Arna Ganguly, Yifu Chen, Jungkuk Lee, Jiaqi Yu, Wenyu Huang, Mark Mba Wright, Michael J. Janik, Wenzhen Li
Summary: This article introduces a new method for hydrogen production through water electrolysis using renewable energy sources. By replacing the sluggish oxygen evolution reaction with an electrocatalytic oxidative dehydrogenation of aldehydes, industrial-level hydrogen production is achieved at lower voltages. The use of a porous CuAg catalyst further enhances the reaction kinetics and a simple reactor with a dialysis porous membrane is demonstrated as a cost-effective and energy-efficient process for hydrogen production.
ENERGY & ENVIRONMENTAL SCIENCE
(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)
