Article
Materials Science, Ceramics
Rohit Malik, Eui-Hyoun Ryu, Young-Wook Kim
Summary: This study successfully achieved the joining of liquid phase sintered SiC ceramics using magnesia-alumina-silica (MAS) glass-ceramic fillers without applied pressure. The research found that the filler composition and joining temperature significantly affected the joint strength, with the joint strength being inversely proportional to the interlayer thickness.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Ning-ning Ma, Jian Chen, Zheng-ren Huang, Ya-jie Li, Meng Liu, Ming Zhu, Xue-jian Liu, Zhong-ming Chen, Yun-zhou Zhu
Summary: The silicon carbide surface modified by laser cladding silicon layer was soldered with borosilicate glass, reducing soldering temperature and improving contact properties, forming a sandwich-like joining structure. The study showed good adhesion between silicon carbide and glass solder layer, with a flexural strength of 110 MPa.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Chuang-Tian Zhan, Sheng-Jin He, Wei-Ming Guo, Yuan-Bin Chen, Shi-Kuan Sun, Hua-Tay Lin
Summary: SiC nano-powders with Al2O3-Y2O3- MgO-CaO additive (NITE-SiC) were used as joining materials for low-temperature joining of SiC ceramics, by controlling the thickness of the interlayers (-10 μm and -60 μm). Residual pores were observed in the -60 μm interlayer after joining at 1650 degrees C, with a shear strength of 39.3 +/- 5.5 MPa. Decreasing the interlayer thickness to -10 μm resulted in no cracks or porosity at the interface region, with a shear strength of 69.5 +/- 8.9 MPa and fracture originating from the matrix. The results showed that using NITE-SiC with Al2O3-Y2O3- MgO-CaO additive as the joining layer and reducing the thickness of the interlayer could lower the joining temperature and significantly improve the mechanical strength of joints.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Cheng-Cai Zhao, Rui-Lin Lin, Min-Min Dai, Xin Xu, Lin-Lin Zhu, Jia-Xiang Xue, Jian-Han Zhai, Hai-Bin Ma, Wei-Ming Guo, Hua-Tay Lin, Qi-Sen Ren, Ye-Hong Liao
Summary: In this study, SiC ceramics were successfully joined at a relatively low temperature of 1500 degrees C using pure polycarbosilane (PCS) as the joining material, distributed homogenously on the surface of SiC through a screen printing method. The XRD pattern confirmed the formation of single-phase SiC from the pyrolysis product of PCS. The ultra-thin interlayer thickness of approximately 2 mu m contributed to a high average shear strength of 105.8 +/- 10.4 MPa, making it a practical and cost-effective method for joining SiC ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Huan Liu, Haibo Wu, Huihui Zhang, Ming Yuan, Jian Chen, Zhongming Chen, Xuejian Liu, Zhengren Huang
Summary: Highly densified SiC ceramics were fabricated by synthesizing single-phase Al4SiC4 powder with low neutron absorption cross section and mixing it with SiC powder, followed by hot pressing. The densification of the ceramics was greatly enhanced by the decomposition of Al4SiC4 and the formation of aluminosilicate liquid phase during sintering. The resulting SiC ceramics exhibited fine equiaxed grains and excellent mechanical properties.
CERAMICS INTERNATIONAL
(2022)
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, Ceramics
Carla Malinverni, Milena Salvo, Alessandro De Zanet, Fabiana D'Isantoa, Federico Smeacetto, Pierre Bertrand, Georg Puchas, Stefan Schaffoner, Valentina Casalegno
Summary: This work focuses on the joining processes of oxide-based ceramic matrix composites (Al2O3f /Al2O3-ZrO2), which are used as radiant tube furnace components in the steel industry. These components have to operate in harsh environments, and they therefore have to resist corrosion, humidity, and combustion. Two glass-ceramics systems, which have Y2Ti2O7 as their main crystalline phase, as well as specific and optimized properties to withstand severe operating conditions, including temperatures of 900 degrees C, are proposed as joining materials. The adhesion of the glass-ceramics to the composite was found to be excellent after mechanical and thermal tests in which they were in direct contact with a 900 degrees C flame and thermal cycling of between 400 degrees C and 900 degrees C.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Luca Reali, Mark R. Gilbert, Max Boleininger, Sergei L. Dudarev
Summary: Neutrons interacting with atomic nuclei in fusion reactors generate a y-photon flux and intense flux of high-energy electrons in materials. These fluxes have implications for crystal defects, plasma stability, and reactor component heating. Although highly resolved numerical calculations of fluxes on a reactor scale are not feasible, estimates based on Boltzmann's transport equation can provide insights into photon and electron generation in different materials and irradiation conditions.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Shuang Zhao, Jun Chen, Feiyue Yang, Guobing Chen, Lei Zhang, Zichun Yang
Summary: Continuous silicon carbide fiber reinforced silicon carbide matrix composites (SiC/SiC) are promising candidate materials for nuclear applications. SiC ceramics and SiC/SiC composite were prepared using a polymer deriving method and irradiated with a 1.8 MeV electron beam. The microstructural evolution and radioluminescence performance were investigated, and the results showed evident amorphization and low radioluminescence intensity in both SiC ceramics and SiC/SiC composite due to the self-absorption of free carbon in the polymer derived SiC ceramics.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Ceramics
Sheng-Jin He, Ling-Feng Su, Chuang-Tian Zhan, Xiu-Bin Chen, Wei-Ming Guo, Shi-Kuan Sun, Li-Xiang Wu, Jia-Xiang Xue, Hua-Tay Lin
Summary: The low-temperature joining of SiC ceramics using CAMS-P and CAMS-G additives for liquid-phase sintering of SiC nanopowders was studied. CAMS-P required a higher temperature and resulted in lower shear strength compared to untreated SiC. CAMS-G provided higher compactness but resulted in gaps and delaminations at the interface. Incorporating CAMS-G and surface oxidation achieved reliable joining with no observed gaps or delaminations, and the joints exhibited high strength. The joining mechanism and microstructural analysis were discussed.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Fatima Zohra Akel, Mahmoud Izerrouken, Mohamed Belgaid
Summary: In this study, radiation damage induced in SiC single crystal by neutrons and neutrons + Xe ions irradiations were characterized using optical measurements (absorption and photoluminescence) and Raman spectroscopy. The results showed that both types of irradiations led to the formation of silicon vacancies (VSi), as indicated by the observed absorption and emission bands. Additionally, the study demonstrated that the additional Xe ions irradiation induced the annealing of pre-existing damage in SiC crystal.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Chang-Cong Huang, Jian Chen, Ming Zhu, Fan-Fan Li, Zheng-Ren Huang
Summary: A Si-40Al joining transition layer was prepared via laser cladding, followed by brazing of SiC ceramics using Si-60Al alloy as the joint filler. The microstructure, composition, and flexural strength of the brazed joints were investigated under different brazing temperatures and holding times. The corrosion resistance of the joints was evaluated using a hydrochloric acid immersion test.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Zikang Wang, Yan Liu, Hui Zhang, Jindi Jiang, Tiesong Lin, Xuejian Liu, Zhengren Huang
Summary: A Ni-Mo filler alloy was developed and utilized to meet the sealing demands of SiC heat exchangers. The wettability of the alloy on SiC ceramics, interfacial microstructure of the brazed joints, and flexural strengths were systematically analyzed. The joints exhibited good room-temperature and high-temperature strength, as well as resistance to acid corrosion, making them promising for applications in challenging environments.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Tae-Gyeong Kim, Kati Raju, Hyun-Kwuon Lee
Summary: This study presents a pressure-less and reliable joining technique for alumina ceramics through a reaction-bonded aluminum oxide (RBAO) method. Effective joining is achieved through the RBAO mechanism, with the joints exhibiting high strength and being comparable to the parent alumina ceramics in terms of strength.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Sergey Fedotov, Tatiana Lipateva, Alexey Lipatiev, Olga Dymshits, Sergey Lotarev, Vladimir Sigaev
Summary: This paper presents a promising technique using femtosecond laser welding for efficient bonding of laser phosphate glass and spinel-based glass-ceramic. The weld joints showed a high shear strength of up to 147 MPa. The study also revealed the laser-induced amorphization of glass-ceramics and the formation of strong interconnection by laser-driven mutual diffusion. These findings demonstrate the potential of femtosecond lasers for efficient industrial welding of various materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Multidisciplinary Sciences
Gonzalo Peralta Marino, Stefano De la Pierre, Milena Salvo, Andres Diaz Lantada, Monica Ferraris
Summary: This study explores the application of modelling and additive layer manufacturing (ALM) for creating materials with interlocking structures to reduce stress concentration in lap joints. The effectiveness of this approach is discussed through modelling and experimental validation, highlighting its potential as an alternative to traditional joining processes.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Ceramics
A. De Zanet, M. Salvo, V. Casalegno
Summary: The high mechanical and chemical properties of SiC make it challenging to texture and modify its surface, but using Atmospheric Pressure Plasmas (APPs) could be a promising alternative to achieve effective surface treatment and improve joint strength in SiC.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Monica Ferraris, Milena Salvo, Valentina Casalegno, Stefano De La Pierre, Luca Goglio, Alessandro Benelli
Summary: This study aimed to evaluate the shear strength of adhesively joined ceramics and steel using an elasto-plastic joining material. Various tests were conducted, and a simple model based on the elastic-plastic response was proposed to analyze the results. The study found consistent shear strength values using the adopted methods and conditions.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Ferdinand Dobes, Hynek Hadraba, Zdenek Chlup, Jiri Matejicek
Summary: By conducting compressive creep tests, it was found that the presence of aluminum nitride particles does not significantly affect the creep rate, while the presence of oxide particles reduces the creep rate. Boron nitride particles have no influence on the creep rate at low stresses but reduce it substantially at high stresses.
Article
Materials Science, Ceramics
Alessandro De Zanet, Matteo Pedroni, Milena Salvo, Espedito Vassallo, Valentina Casalegno
Summary: A study found that using a fluorine-based plasma process can create a brush-like texture on the surface of SiC/SiC composites, thus improving the joint strength of the connected components.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Francesco Barracco, Francesca Demichelis, Elham Sharifikolouei, Monica Ferraris, Debora Fino, Tonia Tommasi
Summary: The production of municipal solid waste (MSW) has increased significantly in recent years. Incineration of MSW can reduce its volume and recover energy, but it also leads to the generation of hazardous residues. This study proposes the valorization of vitrified fly ash (FA) through the production of porous glass-ceramics. Life Cycle Assessment (LCA) was used to evaluate the entire process, from incineration to glass-ceramics production. The results indicate that using bottom ashes as a silica source and combining methane combustion-aided recovery is the most environmentally sustainable scenario.
Article
Chemistry, Physical
Jiri Matejicek, Radek Musalek, Zdenek Dlabacek, Veronika Klevarova, Lenka Kocmanova
Summary: Spark plasma sintering is an advantageous technology to fabricate fully dense tungsten-steel composites and functionally graded layers. The sintered compacts showed fine grains and increased hardness and thermal diffusivity with decreasing powder size. Intermetallic formation was observed in the composites at high temperatures, but had no detrimental effect on the mechanical strength. The successful formation of graded layers and tungsten-steel joints was also demonstrated.
Article
Optics
Andrea Baggio, Matteo Turani, Massimo Olivero, Milena Salvo, Diego Pugliese, Marco Sangermano
Summary: A new system is developed to detect hydrocarbons using optical fiber distributed sensing. The system utilizes a custom-designed optical fiber with silica core and thin silicone cladding, providing quick and selective absorption of oil products and insensitivity to water. By detecting Rayleigh backscattering, the system demonstrates a rapid response to high refractive index hydrocarbons, with a response time of approximately 1 s. Furthermore, in its high-resolution version, the system can accurately locate leakages with an accuracy of 14 cm.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Andrea Baggio, Fabiana D'Isanto, Fabrizio Valenza, Sofia Gambaro, Valentina Casalegno, Milena Salvo, Federico Smeacetto
Summary: This study reviews and discusses the systematic microstructural characterization of alumina joined to Hastelloy C22((R)) using a commercial active TiZrCuNi alloy, BTi-5, as a filler metal. The contact angles of the liquid BTi-5 alloy measured at 900 degrees C for alumina and Hastelloy C22((R)) were 12 degrees and 47 degrees, respectively, indicating good wetting and adhesion with minimal interfacial reactivity or interdiffusion. The thermomechanical stresses caused by the difference in coefficient of thermal expansion between Hastelloy C22((R)) and alumina were identified as the key issues that needed to be resolved in order to prevent joint failure.
Article
Crystallography
Kinga M. Zawadzka, Fabiana D'Isanto, Krzysztof Mars, Federico Smeacetto, Milena Salvo
Summary: A glass-ceramic coating was developed to protect thermoelectric material based on CoSb3. The coating has properties that match the thermal expansion coefficient, deposition temperature, and working temperature of the material. The coating showed limited protective properties against oxidation.
Article
Nuclear Science & Technology
Jakub Klecka, Jan Cizek, Jiri Matejicek, Frantisek Lukac, Jakub Vala
Summary: Nuclear fusion is a potential pathway to sustainable, carbon-free energy, and tungsten coatings are important for fusion reactors. This study used radiofrequency inductively-coupled plasma spray method to deposit W-steel composite coatings and demonstrated their high quality and potential for further testing and upscaling. These coatings can effectively address the issue of thermal expansion mismatch between the W coating and steel components.
NUCLEAR MATERIALS AND ENERGY
(2023)
Article
Materials Science, Ceramics
F. D'Isanto, F. Smeacetto, M. J. Reece, M. Salvo
Summary: By designing and testing various oxidation protective coatings, the Politecnico di Torino has developed effective methods for protecting both p- and n-type thermoelectrics from oxidation. The 'glass-ceramic route' has been proven successful in obtaining thermo-mechanically compatible and high-temperature resistant coated thermoelectrics.
ADVANCES IN APPLIED CERAMICS
(2023)
Article
Materials Science, Ceramics
Carla Malinverni, Milena Salvo, Alessandro De Zanet, Fabiana D'Isantoa, Federico Smeacetto, Pierre Bertrand, Georg Puchas, Stefan Schaffoner, Valentina Casalegno
Summary: This work focuses on the joining processes of oxide-based ceramic matrix composites (Al2O3f /Al2O3-ZrO2), which are used as radiant tube furnace components in the steel industry. These components have to operate in harsh environments, and they therefore have to resist corrosion, humidity, and combustion. Two glass-ceramics systems, which have Y2Ti2O7 as their main crystalline phase, as well as specific and optimized properties to withstand severe operating conditions, including temperatures of 900 degrees C, are proposed as joining materials. The adhesion of the glass-ceramics to the composite was found to be excellent after mechanical and thermal tests in which they were in direct contact with a 900 degrees C flame and thermal cycling of between 400 degrees C and 900 degrees C.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Energy & Fuels
Vishnu Ganesh, Daniel Dorow-Gerspach, Martin Bram, Christian Linsmeier, Jiri Matejicek, Monika Vilemova
Summary: The realization of the first wall (FW) in future fusion reactors, which is composed of a tungsten (W) armor covering steel material, is a critical challenge. This study benchmarks two joining concepts to address the cyclic thermal stress issue caused by the different coefficients of thermal expansion (CTE) of W and steel. One concept uses an atmospheric plasma sprayed graded interlayer, while the other uses a spark plasma sintered graded interlayer. The results show that the joints with a plasma sprayed graded interlayer and a vanadium interlayer can withstand higher heat flux.
Article
Nuclear Science & Technology
D. Dorow-Gerspach, M. Bram, V. Ganesh, J. Matejicek, G. Pintsuk, M. Vilemova, M. Wirtz, C. Linsmeier
Summary: The joining of tungsten and steel is crucial for future commercial fusion reactors, but the large difference in their coefficient of thermal expansion can lead to high thermal stresses and premature failure of the joint. Two solutions explored in this study are the use of functionally graded materials with varying thermal expansion coefficients and the insertion of a ductile metal interlayer. Different joining technologies were evaluated through high heat flux benchmark tests.
NUCLEAR MATERIALS AND ENERGY
(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)
