Article
Chemistry, Physical
Song Zhang, Wei Liu, Weimin Wang, Ying Gao, Aiyang Wang, Qianglong He, Wenhui Bai, Runfeng Li
Summary: This article uses a thermal-electric-mechanical coupled model to simulate the spark plasma sintering process of boron carbide, and conducts parameter optimization and simulation analysis.
Article
Materials Science, Multidisciplinary
Joseph Diatta, Elisa Torresani, Andrey Maximenko, Chris Haines, Darold Martin, Eugene Olevsky
Summary: The numerical evaluation of the influence of the Peltier thermoelectric effect on the evolution of temperature, density, and grain size heterogeneities during spark plasma sintering of boron carbide was conducted in this study. The electro-thermomechanical model developed for the SPS process, taking into account thermoelectric effects, was verified through comparison with experimental microstructure evolution data obtained using high resolution scanning electron microscopy. The model predictions were found to be accurate.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Physical
Xiuqing Li, Minjie Zhang, Guoshang Zhang, Shizhong Wei, Liujie Xu, Yucheng Zhou
Summary: This study investigates the effect of spark plasma sintering temperature on the structure and performance characteristics of Cu-W composite. The optimal SPS sintering temperature for Cu-20 wt%W composite is found to be 950 degrees C. Increasing the sintering temperature leads to an increase in copper-liquid content, which can facilitate the rearrangement of tungsten particles and improve the performance of the composite. However, excessively high temperatures result in inhomogeneous distribution of tungsten and copper phases and a decline in composite performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Mehdi Naghikhani, Mohammad Ardestani, Mohammad Moazami-Goudarzi
Summary: Tungsten carbide reinforced brass matrix composites were synthesized using mechanical milling and sintering methods, with spark plasma sintering showing higher density and hardness. The wear resistance of the spark plasma sintered samples was also superior, with delamination and adhesion observed as dominant wear mechanisms. The bending strength of the spark plasma sintered samples was significantly higher compared to those sintered using pressureless methods.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Jiashi Yu, Qinyang Zhao, Shixing Huang, Yongqing Zhao, Yue Zhou, Jinwen Lu, Longlong Dong, Yusheng Zhang
Summary: Graphene nanoplates are widely used in titanium matrix composite manufacturing due to their superior mechanical properties. The study showed that sintering temperature greatly influences the interfacial structures and comprehensive mechanical properties of the composites, with 1000 degrees Celsius being the optimal SPS temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Maksim S. Boldin, Alexander A. Popov, Evgeni A. Lantsev, Aleksey Nokhrin, Vladimir N. Chuvil'deev
Summary: This article presents the investigation results of the densification behavior mechanism of alumina-based ceramics during spark plasma sintering. The effects of heating rates and additives were studied. The study showed that grain boundary diffusion and particle accommodation control the formation of necks between particles in the initial stage of sintering. Additives only have an effect on the final stage of spark plasma sintering.
Article
Materials Science, Multidisciplinary
Xichun Zhong, Yucai Wu, Yuanxin Li, Xuan Huang, Jiaohong Huang, Cuilan Liu, Hongya Yu, Zhongwu Liu, Minglong Zhong, Zhenchen Zhong, R. V. Ramanujan
Summary: A series of LaFe11.8Si1.2/La65Co35 bulk composites were fabricated by spark plasma sintering (SPS) followed by diffusion annealing. The sintering temperature was found to have an effect on the mechanical and magnetocaloric properties of the composites. The annealed samples exhibited a 1:13 phase content of approximately 90 wt% and showed improved properties when the sintering temperature was adjusted.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
P. Yu Nikitin, I. A. Zhukov, A. B. Vorozhtsov
Summary: In this work, AlMgB14-based materials were successfully obtained by spark plasma sintering from an (Al-Mg)-B powder mixture, and their microstructure and properties were investigated. Samples sintered at high temperatures exhibited high hardness, and a mechanism for the decomposition of AlMgB14 during local overheating was proposed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
Gyeonghun Kim, Jungsu Ahn, Sangjoon Ahn
Summary: The study examined the spark plasma sintering behavior of uranium mononitride synthesized by the hydride-nitride process, revealing two regimes in the sintering process based on temperature. At lower temperatures, pellet density increased with temperature to a maximum value, while grain growth was insignificant. On the other hand, at higher temperatures, rapid achievement of maximum density and significant grain growth were observed.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Ricardo Mineiro, C. M. Fernandes, E. L. Silva, M. R. Soares, D. Figueiredo, B. Ferrari, A. J. Sanchez-Herencia, A. M. R. Senos
Summary: The Spark Plasma Sintering (SPS) technique was used to investigate the sintering process of cBN-TiCN based composites with and without the addition of Ni. The addition of Ni improved the densification of the material, but complete removal of open porosity and transformation of cBN phase to hBN phase only occurred at 1700°C. Other matrix phases, such as TiB2 and Ni3B, were also formed during the sintering process.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Lucas Viers, Florian Delaunay, Remy Boulesteix, Marion Vandenhende, Guy Antou, Alexandre Maitre
Summary: This study focused on the determination of densification mechanisms during Spark Plasma Sintering (SPS) of Ho:Lu2O3 nanopowders. The stress exponent n varied significantly during the sintering process, with different values observed at different relative density stages. An optimized thermomechanical cycle was proposed based on the findings to obtain highly transparent Ho:Lu2O3 ceramics suitable for laser applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Elaheh Ranjbarpour Niari, Mohammad Vajdi, Milad Sakkaki, Shahla Azizi, Farhad Sadegh Moghanlou, Mehdi Shahedi Asl
Summary: Spark plasma sintering is an interesting manufacturing method that benefits from electric current heating. In this study, the sintering process of hafnium diboride ceramics was simulated using the finite element method and COMSOL Multiphysics software. The results showed the required temperature for sintering and the distribution of electric current in the system.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Chemistry, Physical
Anis Aliouat, Guy Antou, Nicolas Pradeilles, Vincent Rat, Alexandre Maitre
Summary: This study aims to investigate the effects of electric/electromagnetic fields generated by pulsed current in Spark Plasma Sintering (SPS) on the sintering mechanisms. The chosen model material was pre-oxidized copper composed of microsized particles. The results showed that increasing the frequency of pulsed current significantly reduces the critical time for electrical transition. Additionally, the coupling between pulsed current and mechanical stress promotes specific mechanisms in SPS.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Hui He, Bingqing Li, Dingyue Chang, Wenhua Luo, Jun Chen, Haoxi Wu, Yingqiu Li, Zhenliang Yang, Rui Gao, Jingkun Xu, Chao Lu
Summary: This study fabricated YH2-x monoliths for the first time using spark plasma sintering and systematically measured and calculated their various properties. The research found that the hydrogen release process is accompanied by the densifying process during sintering, and steep hydrogen release occurs once the sintering temperature exceeds 900 degrees C. Additionally, the microstructural evolution of YH2-x monoliths is related to the densifying process and the hydrogen release behaviors.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Ceramics
C. H. Jeong, E. Vijayakumar, H. G. Lee, W. H. Lee
Summary: In this work, different yttria-stabilized zirconia-titanium (YSZ-Ti) composite compacts were fabricated using electric discharge sintering (EDS) and spark plasma sintering (SPS) methods. The microstructures and mechanical properties of the compacts were analyzed and compared. The results showed that the EDS composite compacts had a uniform distribution of YSZ throughout the Ti matrix, resulting in significantly improved mechanical properties. On the other hand, in the SPS composite compacts, the YSZ content was mainly agglomerated and dispersed at the Ti particle boundaries. The mechanical properties of the SPS compacts were enhanced with increasing YSZ content but not as much as the EDS processed compacts.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Ian Postuma, Patrizia Sommi, Agostina Vitali, Diyun Shu, Greta di Martino, Laura Cansolino, Cinzia Ferrari, Vittorio Ricci, Chiara Magni, Nicoletta Protti, Setareh Fatemi, Umberto Anselmi Tamburini, Silva Bortolussi, Saverio Altieri
Summary: In Boron Neutron Capture Therapy, the effectiveness relies on the concentration and distribution of boron within the tumour cells. This study demonstrates a technique to colocalize alpha particles and lithium ions with cells, using a neutron autoradiography technique. This method combines images of cells with tracks produced in a solid-state nuclear track detector.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Physics, Applied
Angelica Baldini, Michele Petrecca, Claudio Sangregorio, Umberto Anselmi-Tamburini
Summary: The study found that highly pure nanostructured ferrite particles can be synthesized using a simple method and densified through high-pressure field-assisted sintering to obtain materials with complex microstructures. During sintering, there was no change in phase composition, and a high degree of densification while maintaining nanometric crystallite size was achieved by using high uniaxial pressure with relatively low sintering temperatures and times.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Roberta Dal Magro, Agostina Vitali, Stefano Fagioli, Alberto Casu, Andrea Falqui, Beatrice Formicola, Lorenzo Taiarol, Valeria Cassina, Claudia Adriana Marrano, Francesco Mantegazza, Umberto Anselmi-Tamburini, Patrizia Sommi, Francesca Re
Summary: Vascular oxidative stress exacerbates the progression of Alzheimer's disease, but antioxidant compounds like cerium oxide nanoparticles may help improve vascular function. CNP restored ROS levels and increased uptake in brain cells exposed to A beta, potentially offering protection against neurotoxicity.
Article
Biology
Ian Postuma, Sara Gonzalez, Maria S. Herrera, Lucas Provenzano, Michele Ferrarini, Chiara Magni, Nicoletta Protti, Setareh Fatemi, Valerio Vercesi, Giuseppe Battistoni, Umberto Anselmi Tamburini, Yuan Hao Liu, Leena Kankaanranta, Hanna Koivunoro, Saverio Altieri, Silva Bortolussi
Summary: Novel criteria of clinical potential and safety have been introduced to evaluate neutron beams for BNCT, showing that even beams rejected by traditional physical measurements can have comparable clinical performance.Radiobiological and dosimetric criteria are effective tools in selecting safe and effective beams for patient treatment, even when standard physical recommendations are not met.
Article
Physics, Applied
Xuan Li, Ying Tu, Simona Pace, Umberto Anselmi-Tamburini, Joe Briscoe
Summary: The core-shell structure with ZnO cores effectively suppresses surface defects, particularly in ZnO synthesized in an OH- rich environment, where the TiO2 shell coating has a stronger passivation effect on the surface defects. Both PL and XPS results confirm the effectiveness of the TiO2 shell coating in passivating surface defects of ZnO nanostructures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
S. Cisternino, E. Cazzola, H. Skliarova, J. Amico, M. Malachini, G. Gorgoni, U. Anselmi-Tamburini, J. Esposito
Summary: The study explored using Spark Plasma Sintering (SPS) technique to manufacture yttrium solid targets for efficient Zr-89 radioisotope production. Results showed that the production yield and quality of Zr-89 obtained from SPS manufactured targets were comparable to those from standard yttrium foil targets.
NUCLEAR MEDICINE AND BIOLOGY
(2022)
Article
Nuclear Science & Technology
Gabriele Parisi, Andrea Pola, Davide Bortot, Davide Mazzucconi, Giovanni D'Angelo, Chiara Magni, Ian Postuma, Silva Bortolussi, Nicoletta Protti, Saverio Altieri, Umberto Anselmi Tamburini, Valerio Vercesi, Stefano Agosteo
Summary: This paper presents a novel neutron spectrometer called ACSpect, which consists of a two-stages monolithic silicon telescope detector and an organic scintillator. It is capable of high-resolution measurements in the energy range of 250keV-4MeV.
RADIATION MEASUREMENTS
(2022)
Letter
Multidisciplinary Sciences
Martina Fracchia, Mauro Coduri, Maela Manzoli, Paolo Ghigna, Umberto Anselmi Tamburini
NATURE COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Giorgia Pellavio, Patrizia Sommi, Umberto Anselmi-Tamburini, Maria Paola DeMichelis, Stefania Coniglio, Umberto Laforenza
Summary: This study analyzed the effect of cerium oxide nanoparticles (CNPs) on the functioning of aquaporins (AQPs). The results showed that CNPs increased the diffusion of hydrogen peroxide (H2O2) in cells, especially through AQP8. These findings suggest that CNPs could potentially be used as a pharmaceutical agent in diseases involving oxidative stress.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Energy & Fuels
M. Fracchia, D. Callegari, M. Coduri, U. Anselmi-Tamburini, M. Manzoli, E. Quartarone, P. Ghigna
Summary: Various high and medium entropy oxides with rock salt structures were prepared and studied as anodes for lithium batteries. The reaction mechanisms of these systems are complex and involve conversion reactions. The capacity and reduction potential of these materials depend on the number of components and microstructure of the initial materials. However, the dependence cannot be rationalized based on simple stability logic.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Biology
Agostina Vitali, Maria Paola Demichelis, Greta Di Martino, Ian Postuma, Silva Bortolussi, Andrea Falqui, Chiara Milanese, Chiara Ferrara, Patrizia Sommi, Umberto Anselmi-Tamburini
Summary: In this study, multifunctional boron carbide nanoparticles stabilized with polyacrylic acid (PAA) and a gadolinium (Gd)-rich solid phase were synthesized and their biological activity was evaluated. The incorporation of a fluorophore (DiI) allowed for confocal microscopy imaging of the nanoparticles. Novel correlative microscopy techniques were employed to analyze the interaction and activity of these fluorescent Gd-containing B4C nanoparticles (FGdBNPs) with cultured cells. The results indicate that these nanoparticles have the potential to achieve high boron concentration in tumor cells.
Article
Nanoscience & Nanotechnology
Ketan Lohani, Himanshu Nautiyal, Narges Ataollahi, Umberto Anselmi-Tamburini, Carlo Fanciulli, Paolo Scardi
Summary: The effect of Ag doping on the thermoelectric properties of Cu2SnS3 (CTS) was investigated. Various Cu2Ag(x)Sn(1-x)S3 (0.05 <= x <= 0.25) samples were synthesized and their structural and transport properties were studied. The x = 0.15 sample showed a 10-fold higher power factor than the undoped CTS, and both the x = 0.125 and x = 0.15 samples exhibited the highest zT value of 0.8 at 723 K. The increase in thermal conductivity of Cu2Ag(x)Sn(1-x)S3 samples with Ag substitution was found to be caused by the reduction in scattering of phonons due to the incorporation of Ag. Formation energy calculations revealed the reason for the structural transformation of CTS and similar diamond-like structures towards high symmetry polymorphs by external doping. The increase in zT value was attributed to the optimization of the band gap and the weighted mobility.
ACS APPLIED NANO MATERIALS
(2023)
Article
Electrochemistry
Michele Montalbano, Daniele Callegari, Umberto Anselmi Tamburini, Cristina Tealdi
Summary: Transition metal-based sodium fluoro-perovskite materials were investigated as cathode materials for Na-ion batteries. The study combined experimental and computational techniques to investigate structures, defects, and intercalation properties. The results showed the possibility of modulating the sample's morphology and highlighted the correlation between structure and computational data for controlling both ionic and electronic conductivity.
Article
Materials Science, Multidisciplinary
D. Callegari, M. Coduri, M. Fracchia, P. Ghigna, L. Braglia, U. Anselmi Tamburini, E. Quartarone
Summary: The ever-growing demand for high-capacity Li-ion batteries requires electrode materials that are environmentally friendly, Co-free, secure, and durable. In this study, a novel dual-doping strategy was proposed to design LiFexMn2-x-yTiyO4 (LFMT) as high-capacity cathode materials. The substitution of Mn with Fe and Ti suppressed the unwanted distortion and improved the capacity and stability of the batteries.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Physics, Multidisciplinary
C. Magni, M. Ferrarini, I. Postuma, N. Protti, S. Fatemi, C. Gong, U. Anselmi-Tamburini, V. Vercesi, G. Battistoni, S. Bortolussi
Summary: Boron Neutron Capture Therapy (BNCT) is a type of radiotherapy used to treat deep-seated tumors, targeting cancer cells using a borated drug before irradiating the patient with low-energy neutrons. This study presents neutron activation analysis of different aluminum fluoride powders for potential use in the Beam Shaping Assembly (BSA) material. Additionally, Monte Carlo calculations for out-of-field dosimetry are discussed, which are crucial for assessing the safety of clinical neutron beams in terms of dose absorption by surrounding organs.
NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS
(2021)