Article
Materials Science, Ceramics
Stefano De La Pierre, Monica Ferraris, Ilaria Ritucci, Ragnar Kiebach, Henrik Lund Frandsen, Domenico Ferrero, Federico Smeacetto
Summary: The mechanical behavior of glass-ceramic joined steel and glass-ceramic interfaces used in solid oxide cell (SOC) stack technology has been studied. The shear strength of joined and aged samples were measured and the effect of aging on the samples was investigated through SEM-EDS and XRD analysis.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Wei Guo, Long Gao, Bo An, Ding Hao, Jiangtao Xiong, Jinglong Li
Summary: The study focused on using 50Bi2O3-45B2O3-5Al2O3 (BBA) glass for brazing ZrO2 ceramic. The glass showed good wetting ability on ZrO2, with a contact angle of 20.1 degrees at 750 degrees C. The glass achieved successful bonding in the temperature range of 635-750 degrees C for 30 minutes. The joint contained Al4B2O9 whiskers at 635 degrees C, both Al4B2O9 whiskers and Al5BO9 crystals at 650-700 degrees C, and predominantly Al5BO9 crystals at temperatures above 700 degrees C. The maximum shear strength of 75 MPa was obtained when brazing ZrO2 at 675 degrees C. Al4B2O9 whiskers and Al5BO9 crystals hindered crack propagation and improved joint performance, but excessive products could negatively impact the mechanical properties of the joint.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Ceramics
F. Smeacetto, E. Zanchi, D. Meena Narayana Menon, D. Janner, S. Lamnini, M. Salvo, S. De La Pierre, H. Javed, M. Ferraris
Summary: Glass-to-metal interfaces are important for the robustness and mechanical integrity of solid oxide cells. This study focuses on the torsional behavior of hourglass-shaped Crofer 22 APU stainless steel joined with a specially designed glass sealant. The results show that laser processing can increase the torsional shear strength of the Crofer surface by approximately 30%.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Tipeng Shan, Liangbo Sun, Chunfeng Liu, Jian Fang, Zengwei Li, Yue Wen, Boyin Wang, Songsong Guo, Jie Zhang
Summary: A specialized CAS glass-ceramic was developed to join SiC ceramics, and postjoining crystallization heat-treatment significantly improved the shear strength of the joint.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Kevin Rivera, Otto J. Gregory
Summary: Silicon carbide-silicon carbide ceramic matrix composites (SiC-SiC CMC's) are widely used in gas turbine engine hot sections due to their refractory nature and excellent toughness at high temperatures. A novel heat flux sensor has been developed for SiC-SiC CMC based engine components, which can withstand high temperatures. The sensor generates a thermoelectric voltage proportional to the temperature gradient and has a high calibration factor.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Physical
Jian Fang, Liangbo Sun, Songsong Guo, Tipeng Shan, Yue Wen, Chunfeng Liu, Jie Zhang
Summary: A novel two-step method was developed to join SiC ceramics using CLAS glass as the joining material, significantly improving wettability and interfacial bonding strength. By pre-oxidizing the SiC surface, the formation of a SiO2 layer enhanced the wetting behavior of the glass solder, resulting in a nanoscale eutectic structure in the joint seam and an optimal shear strength of 127 MPa achieved at 1240 degrees C, 119% higher than the one-step joining method.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Qianqian Chen, Tiesong Lin, Panpan Lin, Dian Ma, Hiroyuki Inoue, Peng He
Summary: A new method of pre-cladding amorphous glass and glass-ceramic brazing was invented to achieve a high-reliability bonding of yttrium iron garnet ferrite and magnesium titanate ceramic at a relatively low temperature of 725oC. The joint shear strength reached 117 MPa due to the enhancement of CoFe2O4 phases, which was twice as that of the joint directly brazed by amorphous bismuth glass. This method is significant for improving high reliability of microwave devices for long-term service.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Monica Ferraris, Stefano De la Pierre, Yasir Akram, Clemens Steinborn, Georg Puchas, Walter Krenkel
Summary: Ox/ox CMC based on Nextel 610 fibers with 75 wt% alumina - 25 wt% zirconia matrix were joined by a glass-ceramic and tested for creep behavior at high temperatures. The results showed no significant difference between joined and non-joined ox/ox CMC at 850°C after 50 hours, but a difference was observed at 1000°C, suggesting a different creep mechanism controlled by the visco-elastic flow of the glass-ceramic.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Srishti Mishra, Snehanshu Pal
Summary: The structural evolution of Al90Sm10 metallic glass nanowire under torsion deformation at different speeds has been investigated using molecular dynamics simulation. It was found that with increasing torsion speed, the generation of shear transformation zones becomes uneven and the width of shear bands is constrained to narrow regions. Furthermore, the improvement of Voronoi polyhedra also enhances plastic deformation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Timothy Holmquist, Sidney Chocron, Art Nicholls
Summary: This study investigated the effect of the third invariant on the strength and failure of boron carbide and silicon carbide using new test data. The results showed that the failure strength varies under different stress states, indicating the significant impact of the third invariant.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Gyoung-Deuk Kim, Young-Wook Kim, Seok-Min Yong, Wook Ki Jung
Summary: A strategy of incorporating B4C to improve the specific stiffness of SiC ceramics was developed. The incorporation of B4C effectively increased the specific stiffness of SiC ceramics as B4C has a lower mass density and higher Young's modulus. B4C also served as an effective additive for sintering SiC ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Shuang Li, Yang Li, Chuncheng Wei, Peng Wang, Peiling Gao, Lijuan Zhou, Guangwu Wen
Summary: The fabrication route for silicon carbide membrane using boron carbide assistance in co-sintering process results in a reduction of sintering cycles and shorter preparation periods, as well as the formation of a straight and homogeneous selective layer on the substrate.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Bofang Zhou, Taohua Li, Hongxia Zhang, Junliang Hou
Summary: The study found that Zr-Cu composite filler metal can effectively braze SiC ceramic, and the addition of SiCp and Mo can improve the properties of the composite filler metal and joint, increasing the shear strength of the joint.
Article
Materials Science, Ceramics
Kiyoto Sekine, Takeshi Kumazawa, Hideki Kita
Summary: By investigating the influences of joining materials such as Al, Cu, and Au on the microstructure and properties of B4C ceramics, it was found that B4C joints formed using Al metal exhibited higher strength compared to those formed using Cu and Au metals. In alkaline corrosive environments, Cu and Au were identified as the most effective bonding materials for B4C.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Wei Zhang
Summary: Boron carbide-silicon carbide ceramic is a high-performance tribological structural material with in situ formed relief structure, which improves its tribological properties and shows promising potential for various applications.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Jing Wang, Yuji Hatano, Takeshi Toyama, Tomoaki Suzudo, Tatsuya Hinoki, Vladimir Kh. Alimov, Thomas Schwarz-Selinger
Summary: The addition of 0.3 at.% Cr in the tungsten matrix leads to a significant reduction in the retention of hydrogen isotopes, especially at high temperatures. This is attributed to the suppression of vacancy-type defects formation by the addition of chromium.
JOURNAL OF NUCLEAR MATERIALS
(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
Materials Science, Ceramics
F. Smeacetto, E. Zanchi, D. Meena Narayana Menon, D. Janner, S. Lamnini, M. Salvo, S. De La Pierre, H. Javed, M. Ferraris
Summary: Glass-to-metal interfaces are important for the robustness and mechanical integrity of solid oxide cells. This study focuses on the torsional behavior of hourglass-shaped Crofer 22 APU stainless steel joined with a specially designed glass sealant. The results show that laser processing can increase the torsional shear strength of the Crofer surface by approximately 30%.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Fabiana D'Isanto, Milena Salvo, Sebastian Molin, Damian Koszelow, Hassan Javed, Sufyan Akram, Andreas Chrysanthou, Federico Smeacetto
Summary: This work focuses on the joining of porous Fe22Cr ferritic stainless steel to a dense Crofer22APU plate using a silica-based, Ba-containing glass-ceramic. The stability of the joints and their mechanical properties were evaluated before and after thermal ageing at 700 degrees C for 500 hours. The results showed that there were no defects or cracks at the interface between the porous alloy and glass-ceramic, but the porous alloy started to form an oxide scale at this temperature. Tensile testing indicated that the mechanical properties were not affected by thermal ageing.
CERAMICS INTERNATIONAL
(2022)
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.
Review
Nuclear Science & Technology
L. M. Garrison, Y. Katoh, T. Hinoki, N. Hashimoto, J. R. Echols, J. W. Geringer, N. C. Reid, J. P. Allain, B. Cheng, D. Dorow-Gerspach, V. Ganesh, H. Gietl, S. A. Humphry-Baker, E. Lang, I. McCue, J. Riesch, L. L. Snead, G. D. W. Smith, J. R. Trelewicz, Y. Yang, S. J. Zinkle
Summary: The plasma-facing components (PFCs) of future fusion reactors require intricate structures and multiple materials. The behavior of internal solid interfaces in PFCs under neutron irradiation is being explored through the FRONTIER U.S.-Japan collaboration. Promising materials in various areas are presented, including copper alloys, tungsten-copper composites, tungsten-steel composites, additively manufactured tungsten, particle-reinforced tungsten, and tungsten and SiC fiber composites.
FUSION SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Kazuya Shimoda, Tatsuya Hinoki
Summary: BN-nanoparticle-containing SiC-matrix-based composites without a fiber/matrix interface were fabricated by SPS. The mechanical properties of the composites were investigated and the composites with a BN nanoparticle content of 50 vol.% showed quasiductile fracture behavior. The composites also exhibited high strength and bending, proportional limit stress, and ultimate tensile strength values under ambient conditions.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Bo Huang, Meng She, Lin Feng, Yansong Zhong, Kanjiro Kawasaki, Fujio Shinoda, Tatsuya Hinoki
Summary: The effect of Y2O3-Al2O3 sintering additive on the irradiation response of LPS-SiC materials was investigated. CVD-SiC and LPS-SiC specimens were subjected to ion irradiation and compared. The volumetric swelling of LPS-SiC was attributed to the sintering additive YAG.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jing Wang, Yuji Hatano, Takeshi Toyama, Tatsuya Hinoki, Kiyohiro Yabuuchi, Yi-fan Zhang, Bing Ma, Alexander V. Spitsyn, Nikolay P. Bobyr, Koji Inoue, Yasuyoshi Nagai
Summary: This study systematically investigates the irradiation responses of binary W alloys, focusing on the binding energy of an alloying element with a W self-interstitial atom (W-SIA). Plates of W, W-0.3 at.% Cr, W-5 at.% Re, W-2.5 at.% Mo, and W-5 at.% Ta alloys were irradiated, and the formation of vacancy-type defects, the precipitation of alloying elements, and the changes in hardness were studied. It was found that the addition of Cr and Re effectively suppresses the formation of vacancy-type defects, while Ta and Mo have no significant suppression effect. Irradiation hardening was observed in all materials, but its degree was smaller in the W-5 at.% Re alloy.
MATERIALS & DESIGN
(2023)
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
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)
