Review
Chemistry, Physical
K. E. Smetanina, P. V. Andreev, A. V. Nokhrin, E. A. Lantsev, V. N. Chuvildeev
Summary: This review focuses on the origins and mechanisms of carbonization in different materials, such as metallic and hard alloys, ceramics, and transparent ceramics. It discusses the effects of carbon diffusion on the chemical and phase composition, microstructure, and physical and mechanical properties of samples. Two main mechanisms of carbon interaction with the materials are proposed: carbon diffusion into the surface layers and condensation of carbon-containing gases in the pores of the sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Nanoscience & Nanotechnology
Michal Sakajio, Gennady E. Shter, Meirav Mann-Lahav, Vadim Beilin, Shai Zamir, Gideon S. Grader
Summary: Carbon contamination from graphite molds during spark plasma sintering (SPS) significantly affects the properties of the sintered materials, especially transparent ceramics. In this study, transparent YAG ceramics were prepared by using Mo and Ta foils as protective barriers against carbon contamination. It was found that a reaction layer formed at the Ta-YAG interface with a YTaO4-Al2O3 eutectic composition suppressed carbon penetration into the ceramic, increasing its transparency. On the other hand, Mo foils allowed carbon diffusion into the ceramic, resulting in nonuniform microstructural features.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Mechanical
M. F. C. Ordonez, M. C. M. Farias, S. Descartes, I. F. Machado, R. M. Souza
Summary: Consolidated composites of Astaloy 85Mo with the addition of MoS2, graphite, or a mixture of graphite/MoS2 were prepared using Spark Plasma Sintering. Graphite addition resulted in the formation of a tribofilm, leading to the lowest values of friction and wear; MoS2 composites exhibited an increase in friction coefficient at the highest normal loads. MoS2/graphite composites showed intermediate friction coefficient and the highest hardness.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Mei Zhang, Wen-jun Wang, Tie-chui Yuan, Si-yao Xie, Rui-di Li, Zhi-hui Zhou, Yun-bao Xu
Summary: Dense B4C material was fabricated using spark plasma sintering method, and the mechanisms of densification and grain growth were investigated. The results show that there are two sintering periods, densification period and grain growth period, and the mechanisms involve grain boundary sliding, dislocation climb, grain boundary diffusion and volume/liquid-phase diffusion.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Ceramics
Vaclav Tyrpekl, Marco Cologna, Michael Holzhauser, Petr Svora
Summary: This paper investigates the process of flash spark plasma sintering (FSPS) and the densification process of Gd0.1Ce0.9O2-x powder, finding that low electrical fields are sufficient for flash sintering to occur. The study discusses the challenges of sintering ceria using FAST techniques due to its mechanochemical transformations.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
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, 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
Materials Science, Ceramics
Jingkun Xu, Fangnan Zhao, Shan He, Zetan Liu, Zhipeng Xie
Summary: High-entropy (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)C ceramics were fabricated via spark plasma sintering, and the microstructure evolution and grain growth mechanism were investigated. It was found that the grain growth of ceramics can occur by a grain coalescence mechanism at moderate temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Mohammad Abedi, Atefeh Asadi, Saeed Sovizi, Dmitry Moskovskikh, Stepan Vorotilo, Alexander Mukasyan
Summary: The effect of pulsed direct current (PDC) on solid-state diffusion in the Ni-Al binary system was investigated. It was found that PDC significantly enhanced the growth rates of two intermetallic phases and reduced the activation energy of diffusion.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Rubia Hassan, Kantesh Balani
Summary: The sintering mechanisms of ZrB2 and SiC-reinforced ZrB2 ceramic composites were investigated by determining the activation energy of densification in different temperature ranges. The results showed that the addition of SiC changed the prominent densification mechanism and impacted the mechanical performance with systemic increase of sintering temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Chemical
V. S. Buinevich, A. A. Nepapushev, D. O. Moskovskikh, G. V. Trusov, K. V. Kuskov, A. S. Mukasyan
Summary: A submicron powder of non-stoichiometric hafnium carbonitrides was successfully fabricated by mechanochemical synthesis method, which was then consolidated into dense bulk hafnium carbonitride ceramics using spark plasma sintering approach. The study revealed the hardness and fracture toughness of the synthesized ceramics, and compared the obtained results with previously reported data.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Ostap Zgalat-Lozynskyy, I Kud, L. Ieremenko, L. Krushynska, D. Zyatkevych, K. Grinkevych, O. Myslyvchenko, V Danylenko, S. Sokhan, A. Ragulya
Summary: A Si3N4-ZrN wear-resistant self-healing composite material with excellent material properties and self-healing capability has been developed.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
H. Unsal, S. Grasso, A. Kovalcikova, O. Hanzel, M. Tatarkova, I Dlouhy, P. Tatarko
Summary: Homogenous, fully dense samples free of graphene were obtained by using insulating Al2O3 paper during reactive SPS. Isolated SPS had the main advantages of short dwell time (30 s after a degassing step of 6 min) and uniform distribution of fine TiB2 grains over the reactive hot press and SPS processes, respectively.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Damiano Angioni, Roberto Orru, Giacomo Cao, Sebastiano Garroni, Pier Carlo Ricci, Khachatur V. Manukyan
Summary: A processing route combining Solution Combustion Synthesis (SCS) and Spark Plasma Sintering (SPS) was proposed for the fabrication of bulk nanostructured biphasic calcium phosphates. The apatite phase content was maximized using SCS with a fuel to oxidizer ratio of 1.1. After air-annealing at 700 degrees C/3 h, the powders consisted of carbonated apatite, α-TCP, and β-TCP. Sintering at 900 degrees C retained the original nanostructure, resulting in nearly 91% dense, apatite-rich, biphasic bioceramics with grain size around 100 nm.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
M. Shahriari, M. Zakeri, M. Razavi, M. R. Rahimipour
Summary: The HfB2-HfC-SiC nanocomposite was successfully produced using spark plasma for the first time, with a self-propagating mode during synthesis and completion at temperatures below 400 degrees Celsius. Thermodynamic calculations and X-ray diffraction confirmed the formation of HfB2, HfC, and SiC phases, with respective crystallite sizes of about 54, 26, and 43 nm determined using the Rietveld method.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Julia-Maria Hubner, Walter Jung, Primoz Kozelj, Matej Bobnar, Raul Cardoso-Gil, Ulrich Burkhardt, Bodo Bohme, Michael Baitinger, Ulrich Schwarz, Yuri Grin
Summary: Cs8B8Si38 is a new compound synthesized under high-pressure high-temperature conditions, belonging to clathrate-I borosilicide. It has poor stability in air and moisture, but is thermally stable at ambient pressure up to 1050 K, showing semiconducting behavior.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2021)
Article
Chemistry, Multidisciplinary
Xian-Juan Feng, Swantje Lerch, Harry Biller, Maik Micksch, Marcus Schmidt, Michael Baitinger, Thomas Strassner, Yuri Grin, Bodo Boehme
Summary: Substituted imidazolium ionic liquids showed low reactivity towards Na12Ge17, while the use of benzophenone as an oxidizer initiated heterogeneous redox reactions, resulting in the formation of Na24-delta Ge136 in bulk quantities.
Article
Chemistry, Physical
Mujde Yahyaoglu, Melis Ozen, Yurii Prots, Oussama El Hamouli, Vahe Tshitoyan, Huiwen Ji, Ulrich Burkhardt, Bertrand Lenoir, G. Jeffrey Snyder, Anubhav Jain, Christophe Candolfi, Umut Aydemir
Summary: The Cu3-xTe2 rickardite mineral, synthesized successfully through a solid-state method, exhibits excellent thermoelectric performance at high temperatures, making it suitable for various applications such as waste heat harvesting and photovoltaic systems.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Gabin Guelou, Christophe Couder, Charles Maniere, Christophe Candolfi, Bertrand Lenoir, Lucile Lallemant, Christophe Coureau, Emmanuel Guilmeau
Summary: The quaternary sulphide V-Sn colusite is a promising thermoelectric material with potential cost efficiency, and its production of large bulk materials using Spark Plasma Sintering can be improved by carefully controlling the SPS conditions to enhance thermoelectric properties.
APPLIED MATERIALS TODAY
(2021)
Article
Materials Science, Multidisciplinary
Patrick Gougeon, Philippe Gall, Shantanu Misra, Anne Dauscher, Christophe Candolfi, Bertrand Lenoir
Summary: The syntheses and crystal structures of two novel cluster compounds were reported, with silver insertion improving the thermoelectric properties but resulting in a moderate ZT value. This study highlights the potential of Ag3Tl2Mo15S19 as a promising material for thermoelectric applications.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Soufiane El Oualid, Iurii Kogut, Mohamed Benyahia, Eugen Geczi, Uwe Kruck, Francis Kosior, Philippe Masschelein, Christophe Candolfi, Anne Dauscher, Jan Dieter Koenig, Alexandre Jacquot, Thierry Caillat, Eric Alleno, Bertrand Lenoir
Summary: Thermoelectric generators demonstrate the potential for efficient energy conversion by utilizing unconventional leg structures to overcome traditional issues such as high electrical contact resistances and thermomechanical stresses. By incorporating thick metallic layers and skutterudite materials, TEGs have achieved record-breaking power densities, indicating a promising pathway for the development of high power density TEGs.
ADVANCED ENERGY MATERIALS
(2021)
Article
Physics, Applied
Michael Baitinger, Hong Duong Nguyen, Christophe Candolfi, Iryna Antonyshyn, Katrin Meier-Kirchner, Igor Veremchuk, Valeriy Razinkov, Mykola Havryluk, Raul Cardoso-Gil, Ulrich Burkhardt, Bodo Bohme, Lukyan Anatychuk, Yuri Grin
Summary: The study successfully upscaled the synthesis of the p-type semiconductor Ba7.8Au5.33Ge40.67 with clathrate-I structure and achieved a thermoelectric figure of merit ZT of around 0.9 at 670 K. By using a carbon layer as a diffusion barrier, sustainable electrical contacts were established at elevated application temperatures.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Xian-Juan Feng, Matej Bobnar, Swantje Lerch, Harry Biller, Marcus Schmidt, Michael Baitinger, Thomas Strassner, Yuri Grin, Bodo Boehme
Summary: The metastable type-II clathrate Na24-delta Ge136 was obtained through a two-step procedure involving the reaction of Na12Ge17 with benzophenone in an ionic liquid followed by annealing under an argon atmosphere. The resulting product exhibited metallic properties and showed slow aging behavior at room temperature.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Physical
A. Moll, R. Viennois, M. Boehm, M. M. Koza, Y. Sidis, J. Rouquette, S. Laborde, J. Debray, B. Menaert, J-P Castellan, C. Candolfi, B. Lenoir, P. Hermet, M. Beaudhuin
Summary: Studies have shown that reducing grain size and residual microstrains can effectively reduce the lattice thermal conductivity of chromium disilicide, thus improving its performance. Additionally, in nanocrystalline CrSi2, there is a spectral weight transfer phenomenon that leads to a significant decrease in lattice thermal conductivity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Richard Drevet, Lionel Aranda, Nicolas David, Mohamed Benyahia, Driss Kenfaui, Philippe Masschelein, Christophe Candolfi, Bertrand Lenoir, Judith Monnier, Anne Dauscher, Eric Alleno, Patrice Berthod
Summary: The research investigated the oxidation behavior and products of Yb0.2Co4Sb12 under airflow conditions, indicating that the low amount of ytterbium promotes the oxidation reactions of the skutterudite material, although the impact on material degradation remains acceptable.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Patrick Gougeon, Philippe Gall, Sylvie Migot, Jaafar Ghanbaja, Maryvonne Hervieu, Petr Levinsky, Anne Dauscher, Bernard Malaman, Bertrand Lenoir, Christophe Candolfi
Summary: Tl0.6Mo3S5 is a novel material with large tunnels, crystallizing in a monoclinic structure according to single-crystal X-ray diffraction data. Low-temperature transport measurements show that it behaves as a narrow-band-gap n-type semiconductor, with high thermal conductivity values at 300 K.
MATERIALS ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Bartlomiej Wiendlocha, Shantanu Misra, Anne Dauscher, Bertrand Lenoir, Christophe Candolfi
Summary: The study presents an independent method to differentiate between resonant and non-resonant impurities by analyzing the low-temperature electrical resistivity rho(0) and carrier mobility mu(0) of SnTe doped with In as a function of impurity concentration x. By comparing with non-resonant cases of SnTe doped with I, Mn, and Ga, the construction of residual resistivity rho(0)(x) and residual mobility mu(0)(x) plots allows for distinguishing between resonant and non-resonant impurities, even when some induce similar thermopower enhancements. The methodology is further confirmed by analyses conducted on Na- and Tl-doped PbTe, showing how transport measurements at low temperatures can be used to determine the resonant nature of an impurity.
MATERIALS HORIZONS
(2021)
Article
Materials Science, Multidisciplinary
Shantanu Misra, Petr Levinsky, Anne Dauscher, Ghouti Medjahdi, Jiri Hejtmanek, Bernard Malaman, G. Jeffrey Snyder, Bertrand Lenoir, Christophe Candolfi
Summary: Chalcogenide semiconductors and semimetals, including tetragonal InTe, are promising candidates for thermoelectric applications due to their high thermoelectric performance near 800 K. An investigation of InTe single crystals grown over a wide temperature range revealed anisotropic transport coefficients and a semiconductor ground state despite previous suggestions of a semimetallic nature. The extremely low lattice thermal conductivity of InTe, combined with a relatively high power factor, resulted in a maximum dimensionless thermoelectric figure of merit of 0.61 at 780 K along the [110] direction, laying a solid foundation for future doping strategies in high-temperature thermoelectric applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Inorganic & Nuclear
Julia-Maria Huebner, Walter Jung, Marcus Schmidt, Matej Bobnar, Primoz Kozelj, Bodo Boehme, Michael Baitinger, Martin Etter, Yuri Grin, Ulrich Schwarz
Summary: Rb8B8Si38 forms under high-pressure, high-temperature conditions and exhibits unique properties such as inertness to strong acids and bases, high thermal stability, electronic balance, diamagnetism, and semiconducting behavior. The compound is characterized as a Zintl phase through chemical bonding analysis using the electron localizability approach.
INORGANIC CHEMISTRY
(2021)
