Article
Engineering, Mechanical
Wanjun He, Qunfeng Zeng
Summary: The partially crystallized 60NiTi film shows the best tribological performance at the micro/nano-scale, with the lowest penetration depth and residual depth.
Article
Engineering, Environmental
Wei Fan, Yuhang Li, Chunliang Wang, Yutong Duan, Yang Huo, Brielle Januszewski, Meng Sun, Mingxin Huo, Menachem Elimelech
Summary: This study demonstrates the enhanced efficiency of TiO2 photocatalytic water treatment by introducing micro-nano bubbles (MNBs), which leads to increased oxygen dissolution, improved colloidal stability and dispersion of TiO2 nanocatalysts, and interfacial photoelectric effects of TiO2/MNB suspensions. The use of MNBs also creates unique light-scattering effects and promotes high bubble-TiO2 complex stability and photocatalytic performance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Lu Huang, Xing Ji, Boxin Nan, Peixin Yang, Huihui Shi, Yali Wu, Duohuan Yu, Huangfei Wu, Yunhuai Zhang, Peng Xiao
Summary: Combining micro-nano bubbles (MNBs) with photoelectrochemical (PEC) reaction system can achieve efficient PEC water oxidation. MNBs can promote oxygen bubble detachment and expose more active sites on the photoanode surface, while the generated hydroxyl radicals can capture photogenerated electrons and increase the energy band bending, resulting in improved PEC performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Coatings & Films
Tianyu Guan, Honggang Zhang, Fengzhou Fang, Nan Zhang
Summary: In this study, a new strategy of combining anionic surfactant sodium dodecyl sulfate (SDS) and cationic surfactant cetyltrimethylammonium bromide (CTAB) was proposed to achieve uniform dispersion and incorporation of tungsten disulfide (WS2) nanosheets in electroformed nickel mould. The combination of high concentration of CTAB and SDS significantly improved the dispersibility and incorporation of WS2 into the nickel matrix, leading to enhanced hardness and reduced friction coefficient. The results show that CTAB promotes particle encapsulation while SDS improves the particle dispersion, and the surface roughness of the mould remains acceptable for mould applications.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Civil
Jianyu Long, Faisal Nazeer, Zhe Yang, Chuan Li
Summary: The compressive properties of Mg-6Zn wt.% (MZ-T6) magnesium alloy were studied after cross pre-compression treatment, showing significant improvements in mechanical properties due to twin-induced grain refinement and changes in texture. Loadings in different directions exhibited varying deformation behaviors and strain hardening regimes, leading to increased hardness in pre-compressed specimens compared to untreated specimens.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Diancheng Geng, Hao Yu, Sosuke Kondo, Ryuta Kasada
Summary: This study introduces the concept of Meyer hardness to explain the linear correlation between Vickers hardness and nanoindentation hardness. The real contact area in nanoindentation tests is estimated using a pile-up correction method, improving the accuracy of the test results.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Coatings & Films
Xiangru Shi, Jian Chen, Ben D. Beake, Tomasz W. Liskiewicz, Zehua Wang
Summary: The study focused on quickly evaluating the dynamic contact behavior of thin protective coatings under high strain rate and repetitive contact damage. Highly resolved single nano-impact and multiple micro-scale impact tests were used to investigate the dynamic hardness and fatigue failure of graphite-like carbon films on stainless steel with varied thickness. Results showed that different film thicknesses exhibited varying levels of resistance to impact fatigue, with underlying factors including stress distribution, film microstructure, and mechanical properties.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Muhammad Wasim, Milos B. Djukic
Summary: This study provides an in-depth analysis of the corrosion-induced degradation of buried ductile iron pipelines, revealing significant changes in composition and nanomechanical properties in accelerated corrosive environments. Structural degradation at the nano scale due to chloride induced localised corrosion was also observed.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Food Science & Technology
Bianca L. Silberbauer, Phillip E. Strydom, Louwrens C. Hoffman
Summary: The study found that there were differences in body measurements between relatively young male and female giraffes, with bulls having significantly longer forelegs and larger horn sizes compared to cows. However, there were no significant differences in average dead weights between the two sexes, and sex had no influence on most of the body measurements recorded.
Article
Energy & Fuels
Danbi Yoo, Peter Tillmann, Tobias Kraus, Johannes Sutter, Angelika Harter, Sergei Trofimov, Boris Naydenov, Klaus Jaeger, Hubert Hauser, Christiane Becker
Summary: This study uses UV-nanoimprint lithography to fabricate and analyze 12 different textures on glass, and examines their angle-resolved reflectance and scattering properties. The results show that textured glass can effectively reduce reflection losses and increase energy yield, especially for photovoltaic systems with large incident angles.
Article
Materials Science, Multidisciplinary
J. H. Zhou, Y. F. Shen, W. Y. Xue, N. Jia
Summary: The study found that decreasing compression temperature leads to a decrease in static recrystallization degree, as well as a reduction in the sizes of grains, subgrains and MX carbides in low activation martensitic steel. This also results in an increase in hardness, mainly due to the decrease in temperature and the increase in nano precipitation content.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Chemistry, Physical
Mashael Binhasan, Abdulilah H. Solimanie, Khalid S. Almuammar, Ahmed R. Alnajres, Mai M. Alhamdan, Khold Al Ahdal, Yasser F. Alfaawaz, Khalid Ali, Fahim Vohra, Tariq Abduljabbar
Summary: The present study evaluated the effect of brushing with two whitening dentifrices on the surface properties of different resin materials. The results showed that the dentifrices had no significant effect on the hardness and gloss of Z350 resin material, but caused a reduction in hardness and gloss of bulk-fill resin material.
Article
Engineering, Multidisciplinary
Xuxiao Han, Chonghong Zhang, Yitao Yang, Mengke Niu, Tieshan Wang, Akihiko Kimura
Summary: The study investigates the hardening process of two types of FeCrAl ODS alloys irradiated by high-energy heavy ions at about 0.8 dpa and 200 degrees C. Results show that the alloy with 0.8 wt% Hf addition exhibits better resistance to irradiation hardening compared to the alloy with 0.6 wt% Zr addition. A correlation between micro- and nanohardness data is established for the ODS alloys. Additionally, a modified Nix-Gao model is utilized to fit the nano-hardness data across the entire indentation depth range.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2021)
Article
Materials Science, Multidisciplinary
Wei Zhang, Zhichao Ma, Chaofan Li, Chaowei Guo, Dongni Liu, Hongwei Zhao, Luquan Ren
Summary: A systematic investigation was conducted to study the interphase strengthening effects on the mechanical performances of multiphase high-entropy alloys (HEAs) at micro/nano-scale compared with single phase HEAs. The study revealed that the interphase exhibited significantly higher strength compared to other phases, and the mechanical size effects were independent of the phase type.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Tao Gu, Shuaixin Zhang, Yuhong Zhao, Yurong Yang, Huafeng Liu, Li Wu, Jianhua Liu, Hua Hou
Summary: By quenching and tempering 45 steel under high pressure, a uniform and compact tempered sorbite with finely dispersed granular carbides can be obtained, leading to improved mechanical properties. This study provides a new method for effectively enhancing the mechanical properties of 45 steel.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Benjamin Seligmann, Markus Alfreider, Michael Wurmshuber, Daniel Kiener
Summary: Microelectronic devices require material systems combining multiple layers of material for proper operation. This study investigates the internal stress states and their influence on deformation behavior in a Si-WTi-Cu material system using in situ thermomechanical cantilever bending experiments. The experiments reveal that the Cu layer undergoes partial plastic deformation during heating, which may result in failure of devices. A model incorporating plastic deformation and known residual stresses is proposed and verified by Finite Element Analysis to assess the internal stress and strain states based on in situ observation.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Dominik Steinberger, Inas Issa, Rachel Strobl, Peter J. Imrich, Daniel Kiener, Stefan Sandfeld
Summary: The lifetime and performance of engineering components are influenced by fracture processes, which start at the atomic scale and interact with defects, ultimately affecting the macroscopic behavior and fracture properties. Identifying the atomistic processes at a crack tip remains a challenge. Researchers have developed a method combining quantitative in-situ observations, three-dimensional reconstruction of dislocation structure, and computational analysis to better understand and control local failure processes.
COMPUTATIONAL MATERIALS SCIENCE
(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
Materials Science, Multidisciplinary
T. Kluensner, M. Krobath, R. Konetschnik, C. Tritremmel, V. Maier-Kiener, D. Samardzic, W. Ecker, C. Czettl, C. Mitterer, D. Kiener
Summary: In this study, micromechanical specimens were produced using focused ion beam milling to investigate the fracture behavior of rough substrate-coating interfaces with complex defect structure. It was found that a stable value of the maximum principal stress triggering fracture in the ceramic-ceramic interfaces was observed for inclination angles >= 45 degrees. The interface strength was determined by observing the crack path at the substrate-coating interface via scanning electron microscopy and analyzing the effectively loaded interface area values.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(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
Markus Alfreider, Michael Meindlhumer, Tobias Ziegelwanger, Rostislav Daniel, Jozef Keckes, Daniel Kiener
Summary: Nanostructured materials play a key role in various modern applications. For instance, hard and wear-resistant metal nitride coatings are essential in industrial dry-milling processes to protect cutting tools. However, improving the dynamical properties of these nanostructured thin films is challenging due to difficulties in probing parameters of (sub-)micron layers without substrate influence. To address this issue, a novel method called micromechanical spectroscopy (mu MS) based on resonance peak measurements of a cantilever-transducer system is developed and applied to an Al0.8Cr0.2N model system. The research reveals the precipitation of cubic CrN and local Cr variations in the wurtzite-type supersaturated Al0.8Cr0.2N system after annealing at 1050 degrees C, resulting in a 63 percent increase in damping capability and a 36 percent increase in Young's modulus.
Article
Chemistry, Physical
Gloria Graf, Malina Seyffertitz, Petra Spoerk-Erdely, Helmut Clemens, Andreas Stark, Lukas Hatzenbichler, David Holec, Michael Burtscher, Daniel Kiener, Xiaobing Li, Kui Liu
Summary: In order to promote the use of intermetallic γ-TiAl based alloys in the aircraft and automotive sector, recent research has focused on the development of low-cost titanium aluminides. The addition of manganese has shown potential to replace more expensive alloying elements and improve the ductility. However, Mn-containing alloys are prone to the formation of undesired brittle phases, which can affect the ductility. This study investigated the transformation kinetics and stability range of a specific brittle phase in a low-cost Ti-42Al-5Mn alloy using experimental and computational approaches. The results provide valuable insights for the future design of low-cost γ-TiAl based alloys.
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
Materials Science, Multidisciplinary
Alexander Jelinek, Stanislav Zak, Megan J. Cordill, Daniel Kiener, Markus Alfreider
Summary: Two-photon lithography enables the design and characterization of novel micromechanical specimens, expanding the possibilities for miniaturized technologies. This study presents a methodology for automated specimen fabrication and testing, and analyzes the influence of parameters on the essential work of fracture. The findings provide a foundation for statistical fracture evaluation in other resin materials and thin film systems.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
Michael Burtscher, Markus Alfreider, Christina Kainz, Daniel Kiener
Summary: The technical potential of WCu alloys is limited by the modest fracture characteristics of the material system in its coarse-grained condition. To address this, a W-50 at.% Cu composite with a nanocrystalline microstructure was processed using high-pressure torsion deformation. The resulting microstructures were quantified, and the mechanical properties were investigated. The study found that the processed specimens had smaller grain sizes and increased amount of mechanically intermixed W in the Cu grains. The mechanical properties of the processed specimens were comparable to those of the coarse-grained specimens.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(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)
