Article
Materials Science, Ceramics
Yihe Liu, Gang Wang, Yu Zhao, Miao Wang, Rujie He, Caiwang Tan, Wei Wang, Xiaobing Zhou
Summary: SiC ceramics were successfully brazed at lower temperatures using CoFeCrNiCuTi high-entropy alloy and electric field-assisted sintering technology. The inter-diffusion between the filler and ceramics was improved due to the high-entropy effect and the accelerated diffusion of elements. This approach provides a new and efficient filler system for ceramic brazing.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Xiaobing Zhou, Teng Yu, Jie Xu, Yang Li, Zhengren Huang, Qing Huang
Summary: A novel layered structure material, Pr3Si2C2, was successfully synthesized using a molten salt approach, and used as a joining filler for carbon fibers reinforced SiC composites. A near-seamless joint was achieved by the newly precipitated SiC grains, which were well densified with the Cf/SiC matrix. The formation of near-seamless joint eliminates the thermal mismatch issues.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Teng Yu, Heejin Kwon, Linkun Shi, Xiaobing Zhou, Dang-Hyok Yoon, Peter Tatarko, Xin Xu, Zhengren Huang, Qing Huang
Summary: Monolithic SiC was successfully joined using a SiC whisker-reinforced Ti3SiC2 composite filler via electric field-assisted sintering technique, achieving a joint strength higher than 250 MPa. Optimization of process parameters and the addition of up to 15 wt. % SiC whiskers improved joint strength, but a lower joint strength was observed with 20 wt. % SiC whisker addition due to thermal expansion mismatch.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Lin-Kun Shi, Xiaobing Zhou, Kai Xu, Keke Chang, Jian-Qing Dai, Zhengren Huang, Qing Huang
Summary: The study successfully achieved seamless joining of monolithic SiC at a low temperature using electric field-assisted sintering technology, with Yb coating on SiC forming Yb3Si2C2 to create almost completely seamless joints. The high bending strength of the joints indicates a sound connection, potentially useful for SiC-based composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Teng Yu, Jie Xu, Xiaobing Zhou, Peter Tatarko, Yang Li, Zhengren Huang, Qing Huang
Summary: Y3Si2C2 material was synthesized at a low temperature and used as a joining material for C-f/SiC composites, resulting in near-seamless joints using an electric field-assisted sintering technique.
JOURNAL OF ADVANCED CERAMICS
(2022)
Article
Materials Science, Ceramics
Huaxin Li, Takaaki Koyanagi, Caen Ang, Yutai Katoh
Summary: The study successfully demonstrated the joining of SiC materials at relatively low temperature through the electric current-assisted joining (ECAJ) method. Enhancing the current passage achieved the joining of low-resistivity grade, nitrogen doped beta-SiC; rapid crystal growth of textured SiC was found at the interface when joining at higher temperatures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Long Zhou, Chun Li, Xiaoqing Si, Chenghao Zhang, Bo Yang, Junlei Qi, Jian Cao
Summary: Flash joining of silicon carbide (SiC) was achieved at an ultra-low furnace temperature of 400 degrees C in air by applying a direct current (DC) electric field. The voltage and current trends are related to the 'flash' phenomenon of the joining process. The interface temperature ranged from 990 degrees C to 950 degrees C during joining. Flash joining of SiC was realized by electric field-assisted in situ oxidation to form amorphous SiO2 at the interface.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Gang Wang, Yihe Liu, Miao Wang, Yunlong Yang, Yu Zhao, Rujie He, Caiwang Tan, Wei Wang, Xiaobing Zhou
Summary: Electric field-assisted sintering technology (FAST) was used to join SiC ceramic with a CoFeCrNiCu high-entropy alloy filler, and a thin Ti film was deposited on the SiC surface to reduce thermal stress. The microstructure, bending strength, and bonding mechanism were systematically investigated. It was found that a discontinuous TiC layer was formed at the interface, and the interfacial reaction products varied with different brazing temperatures. A joint with a bending strength of 72 MPa was achieved at 1200 degrees C, 73% higher than that of the SiC brazed without Ti coating. This work provides new insights in the design of ceramic brazing with high mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Ceramics
Liu Yan, Zhang Keying, Li Tianyu, Zhou Bo, Liu Xuejian, Huang Zhengren
Summary: Ceramic materials are widely used in aerospace, medicine and energy transportation for their excellent mechanical and chemical properties. Electric-assisted joining technology, with its advantages of low temperature and short time, is of great significance for connecting ceramic materials. This paper focuses on the development of electric-field assisted joining technologies for ceramics and ceramic matrix composites, reviews their research status, and discusses their joining mechanism, interface microstructure, joint strength, influencing factors and limitations.
JOURNAL OF INORGANIC MATERIALS
(2023)
Article
Materials Science, Ceramics
Guixiang Liu, Bo Dai, Yong Ren, Heming He, Weitong Zhang
Summary: Polycrystalline nickel zinc (NiZn) ferrite ceramics composed of sub-micron grains were successfully prepared via an electric current-assisted sintering method using a Ni0.75Zn0.25Fe2O4 nanopowder. The specific saturation magnetization of the sintered samples increased with sintering temperature, while the coercivity and ferromagnetic resonance linewidth decreased.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Jie Xu, Xiaobing Zhou, Shunrui Zou, Lu Chen, Peter Tatarko, Jian-Qing Dai, Zhengren Huang, Qing Huang
Summary: In this study, a novel Pr3Si2C2 additive was prepared and successfully applied in the liquid-phase sintering of SiC ceramics. It was found that an appropriate amount of additive could improve the sintering rate and thermal conductivity of SiC, while excessive additive could decrease the thermal conductivity due to increased interfacial thermal resistance. SiC materials with optimized amount of additive and grain boundary structure exhibited the highest thermal conductivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Zheng Zhang, Chuantong Chen, Aiji Suetake, Ming-Chun Hsieh, Aya Iwaki, Katsuaki Suganuma
Summary: The Ag flake formed paste demonstrates high shear strength sinter-joining on bare Si, SiC, and GaN surfaces, due to its excellent sinter-joining ability and tight adhesion. The mechanical milling-acquired flakes can be rapidly sintered into a porous structure under low-temperature conditions, with drastic morphology reconstruction during sintering introducing robust interfacial connection structures. This promising sinter-joining material is suitable for high temperature applications involving the connection of bare surfaces.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Shufan Wang, Tarini Prasad Mishra, Yuanbin Deng, Luca Balice, Anke Kaletsch, Martin Bram, Christoph Broeckmann
Summary: Electric current-assisted sintering (ECAS) is a promising powder consolidation technique that achieves rapid densification using high heating rates. This study focuses on understanding the role of heating rate in the enhanced densification during ECAS of 8YSZ. Two different heating modes, UHS and FS, are studied, with UHS successfully applied for 8YSZ consolidation. Finite element methods combined with a constitutive model are used to predict densification and grain growth. The results show that high heating rate is the key factor for rapid densification during UHS and FS of 8YSZ.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Ceramics
Junbo Xia, Ke Ren, Yiguang Wang
Summary: Ceramic joining using electric field has attracted significant research attention for its reduced joining barrier and improved reliability, but the mechanism behind E-field assisted joining is still unclear. Joining alumina ceramics using a small current showed that E-field can generate defects and promote the joining process by facilitating ionic diffusion. Results also demonstrated a significant difference in joint strength when E-field was applied in perpendicular and parallel directions to the faying surfaces.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Ambreen Nisar, Tyler Dolmetsch, Tanaji Paul, Cheng Zhang, Benjamin Boesl, Arvind Agarwal
Summary: By using the spark plasma sintering technique, pre-sintered TaC and HfC ceramics can be rapidly joined without any filler, forming a well-bonded interface with superior mechanical properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Editorial Material
Chemistry, Multidisciplinary
Yury Gogotsi, Qing Huang
Article
Materials Science, Ceramics
Ke Chen, Xudong Wang, Jianning Zhang, Haoming Ding, Youbing Li, Yujie Song, Fangfang Ge, Xiaobing Zhou, Shiyu Du, Qing Huang
Summary: MAX phases are a family of damage-tolerant structural materials used in the nuclear energy industry. Ti2SC phase has shown good corrosion resistance to concentrated hydrofluoric acid, potentially making it suitable for use in molten salt reactors.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Polymer Science
Lihua Zhao, Tianhao Li, Bijie Wang, Ke Chen, Xiao Hu, Ming Liu, Liu He, Qing Huang, Yujie Song
Summary: Poly(siloxane-carborane)s are polymeric materials with good thermal stability and anti-oxidation properties, which can be used to protect carbon fiber and carbon foam from damage in harsh environments.
Article
Nanoscience & Nanotechnology
Xiaozhen Ma, Ke Chen, Shuqi Li, Pitchaimari Gnanasekar, Yinyan Zhong, Yupeng An, Qing Luo, Qing Huang, Jin Zhu, Jing Chen, Ning Yan
Summary: In this study, MXene nanosheets were used to modify a lignin-based polyurethane foam, creating an adsorbent with high photothermal conversion performance for heavy oil recovery. The adsorbent showed high solar absorption rate and thermal conductivity, allowing it to adsorb a large amount of heavy crude oil in a short time. Moreover, the adsorbent containing MXene nanosheets can easily degrade in alkaline solutions, leaving harmless titanium dioxide nanoparticles as residues. These bio-based adsorbents exhibit excellent performance in rapid heavy oil removal, degradability, and environmental friendliness, offering a promising solution for cleaning up high-viscous crude oil spills.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Ceramics
Jie Xu, Xiaobing Zhou, Shunrui Zou, Lu Chen, Peter Tatarko, Jian-Qing Dai, Zhengren Huang, Qing Huang
Summary: In this study, a novel Pr3Si2C2 additive was prepared and successfully applied in the liquid-phase sintering of SiC ceramics. It was found that an appropriate amount of additive could improve the sintering rate and thermal conductivity of SiC, while excessive additive could decrease the thermal conductivity due to increased interfacial thermal resistance. SiC materials with optimized amount of additive and grain boundary structure exhibited the highest thermal conductivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Junhui Sun, Ziwen Cheng, Qing Huang, Heming He, Joseph S. Francisco, Shiyu Du
Summary: Based on the intrinsic characteristics of layered materials, this study introduces a universal principle for the production of intact monolayers through layer-by-layer exfoliation via positive charge doping. The universality of this exfoliation method stems from the common electronic structures of layered materials. This strategy opens the possibility of producing diverse high-quality two-dimensional monolayers on a large scale with minimal defects.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Ceramics
Yuanjie Wang, Jian Gong, Xueliang Pei, Liu He, Zhengren Huang, Qing Huang
Summary: In this study, an SiC ceramic precursor, VE-LHBPCS, was designed and synthesized. The ceramic precursor was cross-linked via thiol-ene click reaction. The results showed that the VE-LHBPCS mixture could be cured within a short period of time, forming a high yield ceramic at high temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Tianhao Li, Wei Zhang, Liantai Duan, Ke Chen, Qing Huang, Yinsheng Li, Zhengren Huang, Liu He, Yujie Song
Summary: Trimethylsilyl-substituted polysilazanes were synthesized and utilized to fabricate high-purity stoichiometric Si3N4 ceramics through pyrolysis process. The presence of trimethylsilyl groups enhanced the stability of polysilazanes and facilitated their escape during pyrolysis, leading to reduced oxygen and carbon content in the final polymer-derived Si3N4. The resulting Si3N4 ceramics exhibited amorphous structure up to 1400 degrees C and transformed into alpha-Si3N4 at 1500 degrees C. The synergistic effect of low oxygen and carbon content contributed to the high stability of the amorphous Si3N4 ceramics at high temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Xiaojing Bai, Yuanbin Xue, Kan Luo, Ke Chen, Qing Huang, Xian-Hu Zha, Shiyu Du
Summary: As a large family of two-dimensional materials, MXenes have attracted intensive attention in recent years. In this study, the researchers expanded the M elements of MXenes to the lanthanide series and investigated the electronic properties of lanthanide-based MXenes. The results suggest that lanthanide-based MXenes could have potential applications in spintronics and information storage, among others.
Article
Chemistry, Physical
Shuairu Zhu, Youbing Li, Deyu Liu, Qing Huang, Yongbo Kuang
Summary: This study proposes a potentially generalizable strategy for constructing more compact, stable, and highly active transition metal-based composite materials by alloying transition metals with carbon elements to form high-activity sites.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Liantai Duan, Tianhao Li, Yangzhong Zhao, Yanpei Dang, Jianning Zhang, Ke Chen, Jian Xu, Qing Huang, Chuanzhuang Zhao, Yujie Song
Summary: The high-temperature durability of SiBCN ceramics is significantly influenced by boron concentration and synthesis methods. Carborane-substituted polyborosilazanes were synthesized with a broad range of boron content up to 40 wt %, which improved the thermal stability and functional properties of the ceramics. The introduction of boron inhibited Si3N4 crystallization and increased the crystallization temperature of SiC, while B4C appeared as a new crystalline phase.
INORGANIC CHEMISTRY
(2023)
Article
Polymer Science
Chongwen Yu, Tianhao Li, Xiao Hu, Ming Liu, Qing Huang, Liu He, Yujie Song
Summary: High-performance polymers (HPPs) have good thermal and mechanical properties and are widely used in various fields. However, traditional highly cross-linked HPPs tend to fail at high temperatures due to structural defects. This study introduced a new design strategy using a cyclosiloxane hybrid polymer (CHP) to compensate for the structural defects and improve the performance of HPPs at high temperatures.
Article
Chemistry, Physical
Lu Chen, Youbing Li, Kun Liang, Ke Chen, Mian Li, Shiyu Du, Zhifang Chai, Michael Naguib, Qing Huang
Summary: This study reports the design and synthesis of Ga-containing medium/high entropy MAX phases and their corresponding MXenes. Ga atomic layer etching is carried out using a Lewis acid molten salt (CuCl2). The as-prepared (Ti1/4V1/4Nb1/4Ta1/4)(2)CTx exhibits a Li+ specific capacity of approximately 400 mAh g(-1). For (Ti1/5V1/5Nb1/5Ta1/5Mo1/5)(2)CTx, a specific capacity of 302 mAh g(-1) is achieved after 300 cycles, and high cycling stability is observed at high current densities. This work is of great significance for expanding the family members of MXenes with tunable chemistries and structures.
Article
Chemistry, Physical
Lu Chen, Youbing Li, Ke Chen, Xiaojing Bai, Mian Li, Shiyu Du, Zhifang Chai, Qing Huang
Summary: Entropy stabilization is an effective method to design and explore MAX phases with outstanding properties. In this study, medium-/high-entropy MAX phases with different A elements were synthesized and their crystal structures were verified. The electrical conductivity and charge carrier mobility of these MAX phases are lower than previously reported MAX phases. The electron contribution to thermal conductivity decreases with temperature, while the phonon contribution increases. These findings suggest a composition design route for discovering new MAX phases and tuning their properties.
Article
Chemistry, Multidisciplinary
Yibo Wang, Zhenbo Peng, Nianxiang Qiu, Heming He, Rongjian Pan, Lu Wu, Qing Huang, Shiyu Du
Summary: The study investigates the fuel performance of uranium silicide U3Si5 using first-principles methods, revealing that Si-1 atoms are more prone to forming point defects. It predicts the formation of non-stoichiometric U-rich phase of U3Si5 and shows that helium atoms tend to reside in interstitial sites.
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)
