Article
Engineering, Manufacturing
Johnathon Bryce Hunt, David Pearl, Yuri Hovanski, Ewa Dryzek, Stanislaw Dymek, Carter Hamilton
Summary: This study characterized aluminum alloy welds using positron annihilation lifetime spectroscopy and mechanical testing, and found that different control conditions and the dissolution temperatures of strengthening phases have significant effects on the performance of the welds.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Article
Materials Science, Multidisciplinary
Kaichi Saito, Makio Suzuki, Yuichiro Hayasaka, Kana Takenaka, Satoshi Semboshi
Summary: The study compares the mechanical properties and microstructures of the Cu96Ti4 alloy and its Mg-doped counterpart. The Mg-doped alloy exhibits superior mechanical properties to the binary alloy, with differences in microstructure observed.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Yunhe Zheng, Laure Bourgeois, Jian-Feng Nie
Summary: This study investigated the structure of precipitates in Mg-Zn-Al alloys, revealing new structural features and proposing that the rod-shaped precipitates can be described by tiling of different shapes.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Katarzyna Stan-Glowinska, Amelia Zieba, Lukasz Rogal
Summary: This study investigates the microstructures and mechanical properties of two conventionally cast Al-Mg-Zn base alloys during aging process. The results show that the Ga-bearing alloy exhibits higher hardness and tensile strength, which can be attributed to its higher precipitate number density. In addition, the structure of formed precipitates differs between the two alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Alok Singh, Takanobu Hiroto, Hiroyuki Watanabe, Naoko Ikeo, Toshiji Mukai, Koichi Tsuchiya
Summary: Addition of Al to equiatomic high entropy alloy promotes formation of BCC phase and sigma phase. Straining by caliber rolling induces morphological changes related to planar faults, where sigma phase nucleates first on the matrix faults followed by formation of B2 phase driven by elemental concentration changes. This study provides insights into the formation mechanisms of different phases in the alloy.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Nadine Eissmann, Uwe Muehle, Uwe Gaitzsch, Gunnar Walther, Thomas Weissgaerber, Bernd Kieback
Summary: The effect of titanium addition beyond the solubility limit was investigated to demonstrate the precipitation hardening possibility of the Cantor alloy CoCrFeMnNi. Following appropriate heat treatment, a significant increase in hardness was detected due to nanometer-sized precipitates identified through TEM analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Dipankar Biswas, Anindya Sundar Das, Soumyajyoti Kabi, Loitongbam Surajkumar Singh, Maudud Ahmed, Shubharaj Mukherjee, P. M. G. Nambissan
Summary: The intrinsic defect properties and dielectric characteristics of metal oxide nanocomposites were studied, revealing the impact of newly formed nanocrystallites on amorphous glassy matrices. The dielectric properties were found to be temperature and frequency dependent, with correlations among various measured parameters discussed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Michael Mayer, Jiri Svoboda, Francisca Mendez-Martin, Simon Fellner, Christoph Gammer, Vsevolod Razumovskiy, Laura Resch, Wolfgang Sprengel, Andreas Stark, Stefan Zeisl, Gerald Ressel
Summary: The effect of cryogenic mechanical alloying (MA) on the dissolution of yttria was investigated. It was found that cryogenic MA resulted in a stronger decrease of the oxide particle size and the formation of smaller nanoclusters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Daniel Irmer, Charbel Moussa, Lisa T. Belkacemi, Mohamed Sennour, Alan Vaissiere, Vladimir A. Esin
Summary: The effect of cold rolling on the precipitation kinetics of the hardening phase was investigated in AA2024. Cold rolling induced faster coarsening kinetics and nucleation/growth of the S-phase, resulting in lower hardness of pre-deformed AA2024-T8 compared to the undeformed state. Cold rolling also led to a fine and homogeneous distribution of hardening precipitates and a different aspect ratio of S-phase precipitates. These findings may be applicable to other precipitation-hardened alloys as well.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jayshri Dumbre, Shravan K. Kairy, Elaf Anber, Timothy Langan, Mitra L. Taheri, Thomas Dorin, Nick Birbilis
Summary: Scandium (Sc) containing Al-Si model alloys were heat-treated to form (Al,Si)(3)Sc phase at 350 degrees C and V-phase (AlSc2Si2) at above 450 degrees C. The hardening of the alloys was attributed to the coherent nanoscale (Al,Si)(3)Sc precipitates, while significant softening was observed due to the formation of coarse V-phase. The V-phase was found to have a rod morphology and six new orientation relationships with the alpha-Al matrix were determined using TEM.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nuclear Science & Technology
D. Papadakis, S. Dellis, K. Mergia, V. Chatzikos, D. Terentyev, G. Bonny, A. Dubinko, W. Van Renterghem, M. J. Konstantinovic, S. Messoloras, G. Pintsuk
Summary: The study found that neutron irradiation of ITER grade W resulted in an increase in dislocation line density, formation of dislocation loops and voids, increase in hardness, and decrease in creep. However, annealing treatment only eliminated small vacancy clusters in the material, leaving behind dislocations with slightly reduced hardness and increased creep.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Materials Science, Multidisciplinary
P. N. Maya, S. Mukherjee, P. Sharma, A. Satyaprasad, P. K. Pujari
Summary: The evolution of point defects in cold-rolled tungsten samples was studied using positron annihilation spectroscopy and transmission electron microscopy. It was found that there was a correlation between the intensity of mono-vacancy-like lifetime and the initial stages of recrystallization at 1373 K annealing temperature, while the formation of large vacancy clusters was observed at higher annealing temperatures around 2000 K, exceeding the defect recovery temperature in tungsten.
Article
Nanoscience & Nanotechnology
Z. H. Li, T. T. Sasaki, A. Uedono, K. Hono
Summary: This study investigates the role of Zn in the rapid age-hardening process of magnesium alloys. The results show that the addition of Zn facilitates the formation of Ca-Zn co-clusters, which contributes to the rapid age-hardening.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Witold Chrominski, Malgorzata Lewandowska
Summary: Thermo-mechanical treatment is an important tool for designing properties of aluminum alloys. This study investigates a complex procedure to increase the mechanical strength of Al-Mg-Si alloy beyond conventional levels by introducing interlayer boundaries through plastic deformation and healing the microstructure while maintaining deformation-related features. The precipitation processes vary depending on the placement of solution treatment, but the final hardness is always increased compared to typical heat treatment. Observations using transmission electron microscope study the variations in nucleation and growth of strengthening phases.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Yifan Wang, Yanli Lu, Jinhan Xu, Shiyao Zhang, Wei Wu, Zheng Chen
Summary: The effect of Ti addition on precipitation evolution in Al-7Si-Mg alloy was investigated using HRTEM and first-principles calculations. It was found that Ti addition suppressed the precipitation of Mg-Si phases, leading to a deceleration in aging hardening kinetics. At later stages, Al3Ti phase underwent substitution by Si atoms to form a more stable Al2SiTi phase. Additionally, precipitation of Mg-Si phases prevented a decrease in hardness at the over-aged stage.
Article
Physics, Multidisciplinary
R. Caravita, M. Antonello, A. S. Belov, G. Bonomi, R. S. Brusa, M. Caccia, A. Camper, F. Castelli, D. Comparat, G. Consolati, A. Demetrio, L. Di Noto, M. Doser, M. Fani, R. Ferragut, S. Gerber, M. Giammarchi, A. Gligorova, L. T. Gloeggler, F. Guatieri, S. Haider, A. Hinterberger, O. Khalidova, D. Krasnicky, V Lagomarsino, C. Malbrunot, S. Mariazzi, V Matveev, S. R. Mueller, G. Nebbia, P. Nedelec, M. Oberthaler, E. Oswald, D. Pagano, L. Penasa, V Petracek, F. Prelz, B. Rienaecker, O. M. Rohne, A. Rotondi, H. Sandaker, R. Santoro, G. Testera, I Tietje, V Toso, T. Wolz, C. Zimmer, N. Zurlo
ACTA PHYSICA POLONICA A
(2020)
Article
Instruments & Instrumentation
L. Anzi, A. Ariga, A. Ereditato, R. Ferragut, M. Giammarchi, G. Maero, C. Pistillo, M. Rome, E. P. Scampoli, V Toso
JOURNAL OF INSTRUMENTATION
(2020)
Article
Instruments & Instrumentation
C. Amsler, M. Antonello, A. Belov, G. Bonomi, R. S. Brusa, M. Caccia, A. Camper, R. Caravita, F. Castelli, D. Comparat, G. Consolati, A. Demetrio, L. Di Noto, M. Doser, P. A. Ekman, M. Fani, R. Ferragut, S. Gerber, M. Giammarchi, A. Gligorova, F. Guatieri, P. Hackstock, D. Haider, S. Haider, A. Hinterberger, A. Kellerbauer, O. Khalidova, D. Krasnicky, V Lagomarsino, C. Malbrunot, S. Mariazzi, V Matveev, S. R. Mueller, G. Nebbia, P. Nedelec, L. Nowak, M. Oberthaler, E. Oswald, D. Pagano, L. Penasa, V Petracek, F. Prelz, M. Prevedelli, B. Rienaecker, J. Robert, O. M. Rohne, A. Rotondi, H. Sandaker, R. Santoro, J. Storey, G. Testera, I. C. Tietje, V Toso, T. Wolz, J. Wuethrich, P. Yzombard, C. Zimmer, N. Zurlo
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2020)
Article
Materials Science, Ceramics
A. Prado Espinosa, L. Ramajo, F. Rubio-Marcos, C. Macchi, A. Somoza, M. Castro
Summary: The study investigates the induced changes in the vacancy-like defect structure and dielectric properties of K0.5Na0.5NbO3 ceramics by adding various amounts of BaTiO3. Structural evolution was monitored using X-ray diffraction and Raman spectroscopy, with positron annihilation lifetime spectroscopy used to identify defect structures at a sub-nanometric scale. The discussion also highlights lattice symmetry changes and defects formed due to ion replacements in the KNN-based ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Instruments & Instrumentation
G. Vinelli, R. Ferragut, M. Giammarchi, G. Maero, M. Rome, V Toso
JOURNAL OF INSTRUMENTATION
(2020)
Article
Physics, Multidisciplinary
Claude Amsler, Massimiliano Antonello, Alexander Belov, Germano Bonomi, Roberto Sennen Brusa, Massimo Caccia, Antoine Camper, Ruggero Caravita, Fabrizio Castelli, Patrick Cheinet, Daniel Comparat, Giovanni Consolati, Andrea Demetrio, Lea Di Noto, Michael Doser, Mattia Fani, Rafael Ferragut, Julian Fesel, Sebastian Gerber, Marco Giammarchi, Angela Gligorova, Lisa Theresa Gloggler, Francesco Guatieri, Stefan Haider, Alexander Hinterberger, Alban Kellerbauer, Olga Khalidova, Daniel Krasnicky, Vittorio Lagomarsino, Chloe Malbrunot, Sebastiano Mariazzi, Viktor Matveev, Simon Muller, Giancarlo Nebbia, Patrick Nedelec, Lilian Nowak, Markus Oberthaler, Emmanuel Oswald, Davide Pagano, Luca Penasa, Vojtech Petracek, Luca Povolo, Francesco Prelz, Marco Prevedelli, Benjamin Rienacker, Ole Rohne, Alberto Rotondi, Heidi Sandaker, Romualdo Santoro, Gemma Testera, Ingmari Tietje, Valerio Toso, Tim Wolz, Pauline Yzombard, Christian Zimmer, Nicola Zurlo
Summary: Pulsed production of antihydrogen allows for control of temperature, tuning of Rydberg states, de-excitation by pulsed lasers, and manipulation through electric field gradients, marking a significant milestone for the AEgIS experiment.
COMMUNICATIONS PHYSICS
(2021)
Article
Multidisciplinary Sciences
Eleonora Pasino, Simone Cialdi, Giovanni Costantini, Rafael Ferragut, Marco Giammarchi, Stefano Migliorati, Massimiliano Rome, Timothy Savas, Valerio Toso
Summary: An interferometric method is proposed for measuring particle masses and their mass ratio, specifically focusing on electron and positron to detect potential symmetry violations between matter and antimatter.
Article
Physics, Condensed Matter
Gioele Pagot, Valerio Toso, Bernardo Barbiellini, Rafael Ferragut, Vito Di Noto
Summary: Positron annihilation spectroscopy using lifetime and Doppler broadening is used to characterize the lithiation state in LiCoO2 thin film in the cathode of lithium-ion batteries. The results show that the presence of graphite in between the oxide grains in real cathode Li-ion batteries causes positron spillover, which affects the measured positron parameters sensitive to delocalized electrons from lithium atoms. The first component of positron lifetime corresponds to a bulk-like state, while the second component represents a surface state at the grain-graphite interface.
Review
Physics, Condensed Matter
Johannes Nokelainen, Bernardo Barbiellini, Jan Kuriplach, Stephan Eijt, Rafael Ferragut, Xin Li, Veenavee Kothalawala, Kosuke Suzuki, Hiroshi Sakurai, Hasnain Hafiz, Katariina Pussi, Fatemeh Keshavarz, Arun Bansil
Summary: Studying the redox mechanisms in Li-ion batteries is crucial for the rational design of next-generation battery materials. This review explores spectroscopic descriptors to gain insights into the atomic-scale characteristics of redox orbitals and provides an understanding of the workings of lithium-ion batteries.
Article
Physics, Fluids & Plasmas
C. Amsler, H. Breuker, S. Chesnevskaya, G. Costantini, R. Ferragut, M. Giammarchi, A. Gligorova, G. Gosta, H. Higaki, E. D. Hunter, C. Killian, V. Kletzl, V. Kraxberger, N. Kuroda, A. Lanz, M. Leali, V. Maeckel, G. Maero, C. Malbrunot, V. Mascagna, Y. Matsuda, S. Migliorati, D. J. Murtagh, Y. Nagata, A. Nanda, L. Nowak, E. Pasino, M. Rome, M. C. Simon, M. Tajima, V. Toso, S. Ulmer, L. Venturelli, A. Weiser, E. Widmann, T. Wolz, Y. Yamazaki, J. Zmeskal
Summary: This article discusses the interaction between magnetized nonneutral plasma and the microwave environment. By using fine copper meshes and cryogenic microwave absorbing material, the effective temperature of the radiation environment can be lowered, resulting in reduced plasma temperature.
PHYSICS OF PLASMAS
(2022)
Article
Instruments & Instrumentation
V. Kraxberger, C. Amsler, H. Breuker, S. Chesnevskaya, G. Costantini, R. Ferragut, M. Giammarchi, A. Gligorova, G. Gosta, H. Higaki, E. D. Hunter, C. Killian, V. Kletzl, N. Kuroda, A. Lanz, M. Leali, V. Maeckel, G. Maero, C. Malbrunot, V. Mascagna, Y. Matsuda, S. Migliorati, D. J. Murtagh, Y. Nagata, A. Nanda, L. Nowak, E. Pasino, M. Rome, M. C. Simon, M. Tajima, V. Toso, S. Ulmer, L. Venturelli, A. Weiser, E. Widmann, T. Wolz, Y. Yamazaki, J. Zmeskal
Summary: The ASACUSA experiment aims to measure the ground state hyperfine splitting of antihydrogen to test CPT invariance. The hodoscope, consisting of scintillator bars and fibres, was successfully used with waveform digitizers for time resolution. However, the slow readout speed was improved by replacing the digitizers with TDCs reading out the ToT signal.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Multidisciplinary Sciences
Gioele Pagot, Vito Di Noto, Keti Vezzu, Bernardo Barbiellini, Valerio Toso, Alberto Caruso, Meiying Zheng, Xin Li, Rafael Ferragut
Summary: Lithium-ion batteries (LIBs) are a promising power source for various applications. The cathode, with low electrical conductivity and Li-ion diffusivity, is a major bottleneck in LIBs. The carbon coating layer plays a crucial role in enhancing electrical conductivity and protecting the active material. Positron annihilation and broadband electrical spectroscopies are important tools for investigating the electronic effect of the carbon phase on cathode performance and Li-ion dynamics.
Article
Physics, Condensed Matter
Xin Li, Bernardo Barbiellini, Vito Di Noto, Gioele Pagot, Meiying Zheng, Rafael Ferragut
Summary: Positron annihilation spectroscopy is a powerful tool for investigating interfaces in materials relevant for energy storage, such as Li-ion batteries. The key to interpreting the results lies in the positron implantation profile, which is a spatial function related to the characteristics of the battery materials. We provide models for the positron implantation profile in the cathode of a Li-ion battery coin cell, allowing for reliable visualization of multilayer geometries and interfaces in thin cathodes of lithium-ion batteries.
Proceedings Paper
Physics, Mathematical
I. C. Tietje, C. Amsler, M. Antonello, A. Belov, G. Bonomi, R. S. Brusa, M. Caccia, A. Camper, R. Caravita, F. Castelli, P. Cheinet, D. Comparat, G. Consolati, A. Demetrio, L. Di Noto, M. Doser, M. Fani, R. Ferragut, J. Fesel, S. Gerber, M. Giammarchi, A. Gligorova, L. T. Gloggler, F. Guatieri, S. Haider, A. Hinterberger, A. Kellerbauer, O. Khalidova, D. Krasnicky, V Lagomarsino, C. Malbrunot, L. Nowak, S. Mariazzi, V Matveev, S. R. Mueller, G. Nebbia, P. Nedelec, M. Oberthaler, E. Oswald, D. Pagano, L. Penasa, V Petracek, L. Povolo, F. Prelz, M. Prevedelli, B. Rienacker, O. M. Rohne, A. Rotondi, H. Sandaker, R. Santoro, G. Testera, V Toso, T. Wolz, P. Yzombard, C. Zimmer, N. Zurlo
SYMMETRIES IN SCIENCE XVIII
(2020)
Article
Physics, Multidisciplinary
M. Fani, M. Antonello, A. Belov, G. Bonomi, R. S. Brusa, M. Caccia, A. Camper, R. Caravita, F. Castelli, D. Comparat, P. Cheinet, G. Consolati, A. Demetrio, L. Di Noto, M. Doser, R. Ferragut, J. Fesel, S. Gerber, M. Giammarchi, A. Gligorova, L. T. Gloeggler, F. Guatieri, S. Haider, A. Hinterberger, A. Kellerbauer, O. Khalidova, D. Krasnicky, V Lagomarsino, C. Malbrunot, L. Nowak, S. Mariazzi, V Matveev, S. R. Mueller, G. Nebbia, P. Nedelec, M. Oberthaler, E. Oswald, D. Pagano, L. Penasa, V Petracek, L. Povolo, F. Prelz, M. Prevedelli, B. Rienaecker, O. M. Rohne, A. Rotondi, H. Sandaker, R. Santoro, G. Testera, I. C. Tietje, V Toso, T. Wolz, C. Zimmer, N. Zurlo
