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
Nanoscience & Nanotechnology
Charles Manierea, Joseph Sambasene Diatta, Christophe Couder, Christelle Harnois, Sylvain Marinel
Summary: This study proposes a combined master sintering curve and regression method to determine all sintering model parameters. It introduces the original method of estimating the grain size curve and its impact on the densification kinetics at the final stage. The results show good agreement between the model and experimental data points.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Ceramics
D. Fernandez-Gonzalez, M. Suarez, J. Pinuela-Noval, L. A. Diaz, C. Gomez-Rodriguez, L. V. Garcia Quinonez, A. Borrell, A. Fernandez
Summary: Alumina/molybdenum nanocomposites were prepared by colloidal synthesis and were characterized by microstructure, hardness, toughness, and three-point bending test. The presence of molybdenum nanoparticles resulted in a fine-grained structure and improved mechanical properties compared to monolithic alumina.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Priyadarshini Jayashree, Cinzia Menapace, Simone Turani, Giovanni Straffelini
Summary: This study investigates the dry sliding properties of copper-based composite materials with varying silica and copper content. The materials were produced through conventional compaction and sintering as well as spark plasma sintering (SPS). The SPS process resulted in pronounced densification and hardness, as well as better distribution of constituents. Specimens produced through SPS exhibited the presence of a C layer on their surfaces, influenced by the silica content. Low silica content led to a significant C layer that was not removed during testing, resulting in low friction coefficient and pin wear. High silica content led to a sparse C layer that was easily removed but resulted in low adhesion between the friction layer and worn surfaces, causing instability and higher pin wear. Specimens with moderate silica content were identified as the best composition due to their ability to easily shed the C layer, maintain a smooth and compact friction layer, and demonstrate permissible friction coefficient and pin wear.
Article
Materials Science, Ceramics
M. K. G. Abbas, S. Ramesh, K. Y. Sara Lee, Y. H. Wong, C. Y. Tan, U. Johnson Alengaram, P. Ganesan, Farayi Musharavati, Erfan Zalnezhad
Summary: The effect of copper oxide doping on the densification, microstructure evolution, and mechanical characteristics of alumina toughened zirconia ceramic composites was investigated. The addition of 0.2 wt% copper oxide improved densification and mechanical properties without affecting the phase stability, while higher dopant levels were detrimental to the material.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Chenjun Tang, Zheyu Fang, Dong Wang, Xing Jin, Songlin Ran
Summary: The sintering method greatly affects the sintering behavior, microstructure, and properties of TiB2-h-BN composites. TiB2-h-BN composites prepared by reactive spark plasma sintering (RSPS) exhibit better mechanical performance with higher sintering activity and finer microstructure compared to those prepared by conventional spark plasma sintering (CSPS). The in-situ reactive sintering method has obvious advantages in preparing TiB2-h-BN composites with excellent mechanical properties at low temperature.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Adelia Kashimbetova, Karel Slamecka, Sebastian Diaz-de-la-Torre, Jose C. Mendez-Garcia, Bernardo Hernandez-Morales, Maria Cristina Pina-Barba, David Hui, Ladislav Celko, Edgar B. Montufar
Summary: This study systematically investigated the application of pressureless spark plasma sintering (PL-SPS) for fast consolidation of titanium porous structures. The results showed that PL-SPS generated similar sintering conditions to conventional pressure-less sintering, resulting in hierarchical titanium porous structures with equivalent densification, shrinkage, and surface roughness, but minimal grain growth. The use of Poloxamer 407 as a binder and the identification of the lowest possible temperature for thermal elimination were also explored.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Haitao Liu, Zengbin Yin, Lei Zheng, Juntang Yuan
Summary: Al2O3/SiCw ceramic end mill was prepared using spark plasma sintering (SPS) and its densification mechanism, mechanical properties, and cutting performance were studied. The results showed that the densification mechanism of Al2O3 ceramics was mainly controlled by grain boundary diffusion and the addition of 25 wt% SiCw significantly improved the mechanical properties of the ceramic end mill. The tool exhibited satisfactory performance in cutting Inconel 718 workpieces.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Levent Koroglu, Cem Aciksari, Erhan Ayas, Emel Ozel, Ender Suvaci
Summary: SnO2 ceramics were prepared by SPS and conventional sintering techniques, and their densification behavior and microstructural development were studied. SPSed ceramics exhibited higher relative density compared to conventionally sintered ceramics, and showed potential for producing high-quality thin film gas sensors.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Lihong Liu, Koji Morita
Summary: By using a simple one step spark-plasma-sintering (SPS) process to form a fine-grained Al2O3 layer on MgAl2O4, transparent MgAl2O4/Al2O3 laminated composites with an in-line transmission higher than 40% and a hardness of 29.1 GPa can be obtained. This composite structure demonstrates better mechanical properties compared to traditional monolithic materials.
SCRIPTA MATERIALIA
(2021)
Article
Engineering, Manufacturing
S. Ram Prakash, G. Selvakumar, K. Rajkumar
Summary: The study found that adding titanium carbide particles to alumina ceramic composites can accelerate sintering kinetics, improve material properties. The sample with 30 weight percent exhibited the highest relative density and hardness, along with superior wear resistance among all composites.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Ceramics
Hongying Dong, Lu Liu, Shaokun Wang, Yingwei Qi, Haolei Qi, Qing Geng, Yingchai Shuang, Wen Ma
Summary: Traditional yttria stabilized zirconia materials fail at high temperatures due to CMAS corrosion. This study synthesized LaPO4 powder using chemical coprecipitation and heat treatment, and prepared LaPO4 bulk by spark plasma sintering. The CMAS interaction with the LaPO4 bulk at different temperatures was investigated. The LaPO4 bulk exhibited superior CMAS resistance due to its low wettability and the formation of dense corrosion product layers.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Vadde Madhur, Muthe Srikanth, A. Raja Annamalai, A. Muthuchamy, Dinesh K. Agrawal, Chun-Ping Jen
Summary: In this study, W-Cu composites were fabricated by adding various amounts of nano-copper to tungsten, showing improvements in densification, strength, hardness, and electrical conductivity with increasing copper content. Fractography analysis of tensile tested samples revealed a mixed-mode of fracture, and an increase in nano-copper content resulted in higher electrical conductivity.
Article
Chemistry, Physical
Claudiu Nicolicescu, Victor Horia Nicoara, Cristina Ileana Pascu, Stefan Gheorghe, Cristian Oliviu Burada, Traian Florin Marinca, Florin Popa
Summary: The paper analyzes two compaction methods for obtaining W/Cu Functional Graded Materials (FGMs) consisting of three layers with different compositions. The compaction methods used were Spark Plasma Sintering (SPS) and Conventional Sintering (CS). The samples obtained through SPS showed higher densities compared to the samples obtained through CS. The research recommends using SPS for W/Cu-FGMs due to its superior morphology and fine-graded powders.
Article
Chemistry, Inorganic & Nuclear
K. Park, H. Y. Hong, S. Y. Gwon
Summary: In this work, the combination of CS and SPS process, as well as the co-substitution of Li and Mg, effectively improve the electrical transport properties of Bi2Sr2Co2Oy.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
P. Sobota, M. Guzik, V Garnier, G. Fantozzi, M. Sobota, E. Tomaszewicz, Y. Guyot, G. Bouion
CERAMICS INTERNATIONAL
(2020)
Article
Chemistry, Physical
Nur Istiqomah Khamidy, Jerome Laurencin, Dario Ferreira Sanchez, Federico Monaco, Frederic Chariot, Elisabeth Djurado
JOURNAL OF POWER SOURCES
(2020)
Article
Materials Science, Ceramics
S. Gavarini, J. Baillet, N. Millard-Pinard, V. Garnier, C. Peaucelle, X. Jaurand, C. Bernard, R. Rapegno, S. Cardinal, C. Dalverny, B. Lanfant, Y. Leconte
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2020)
Article
Materials Science, Multidisciplinary
Lucie Tabard, Elodie Prud'Homme, Vincent Garnier, Laurent Gremillard
APPLIED MATERIALS TODAY
(2020)
Article
Materials Science, Multidisciplinary
Inas Issa, Lucile Joly-Pottuz, Jonathan Amodeo, David J. Dunstan, Claude Esnouf, Julien Rethore, Vincent Garnier, Jerome Chevalier, Karine Masenelli-Varlot
Summary: In magnesium oxide nanocubes, incipient plasticity in smaller samples is characterized by the nucleation of few dislocations, while a larger number of line defects is observed in larger nanocubes. Yield and flow stresses vary stochastically above a minimum value inversely proportional to the sample size. The size-dependent behavior is justified by statistical analysis and fully explained by the deformation mechanism.
MATERIALS RESEARCH LETTERS
(2021)
Article
Engineering, Manufacturing
L. Tabard, V Garnier, E. Prud'Homme, E-J Courtial, S. Meille, J. Adrien, Y. Jorand, L. Gremillard
Summary: The novel hybrid process combining robocasting and starch-consolidation method allows for the fabrication of ceramic scaffolds with high porosity up to 85%, with precise control over pore volume, size, and distribution across different length scales. This advancement in additive manufacturing and conventional porous ceramics fabrication techniques enables the production of complex porous structures tailored for various applications in biomedical or energy storage fields.
ADDITIVE MANUFACTURING
(2021)
Article
Electrochemistry
Federico Monaco, Elisa Effori, Maxime Hubert, Elisabeth Siebert, Gregory Geneste, Bertrand Morel, Elisabeth Djurado, Dario Montinaro, Jerome Laurencin
Summary: The electrochemical reactions of hydrogen oxidation and steam reduction on a porous cermet electrode made of Ni and 3YSZ were investigated, showing different response mechanisms under anodic and cathodic current. A continuous dynamic model was developed to interpret the experimental results based on charge transfer mechanisms. The electrode response is controlled by charge transfer at triple phase boundary lengths, oxygen vacancies migration in the 3YSZ network, and a purely chemical surface process depending on polarization.
ELECTROCHIMICA ACTA
(2021)
Article
Materials Science, Multidisciplinary
Camille Maestre, Yangdi Li, Vincent Garnier, Philippe Steyer, Sebastien Roux, Alexandre Plaud, Annick Loiseau, Julien Barjon, Lei Ren, Cedric Robert, Bo Han, Xavier Marie, Catherine Journet, Berangere Toury
Summary: In the field of 2D materials, hexagonal boron nitride (hBN) stands out for its excellent characteristics including high thermal conductivity, low compressibility, and wide band gap. It holds great promise for applications in van der Waals heterostructures. Researchers have developed a method combining polymer derived ceramics (PDC) and pressure-controlled sintering (PCS) to obtain millimeter-scale hBN crystals with high chemical and crystalline quality. Exfoliated hBN crystals, known as boron nitride nanosheets (BNNSs), were used to encapsulate transition metal dichalcogenides (TMDs) in van der Waals heterostructures. Optical spectroscopy was used to test the quality and potential opto-electronic applications of these BNNSs.
Article
Materials Science, Ceramics
Omid Akhlaghi, Erik Camposilvan, Zahra Goharibajestani, Sirous Khabbaz Abkenar, Cleva W. Ow-Yang, Yves Jorand, Laurent Gremillard, Vincent Garnier, Jerome Chevalier
Summary: This work describes the development of transparent high-strength Yttria-Stabilized Zirconia (YSZ) ceramics with ultra-fine grain size. Utilizing conventional pressure-less densification, full densification and excellent light transmission were achieved. The resulting ceramics also exhibited high biaxial strength attributed to the refined microstructure and martensitic phase transformation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Mathilde Maillard, Jerome Chevalier, Laurent Gremillard, Guilhem P. Baeza, Edwin-Joffrey Courtial, Sarah Marion, Vincent Garnier
Summary: Robocasting, also known as Direct Ink Writing, is a method for creating dense ceramic parts using micro-extrusion of ceramic pastes through controlled 3D positioning of needles. The quality of the printed parts is influenced by the rheological properties of the ceramic pastes, printing parameters, and thermal post processes. This study characterizes the rheological properties of alumina pastes, establishes correlations between rheological properties and printing conditions, and evaluates extrudability, shape fidelity, and mechanical performance of the final parts. The paper introduces an extended definition of printability that considers functional requirements of the final parts in addition to processability criteria.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
A. Schmitt, D. Mele, M. Rosticher, T. Taniguchi, K. Watanabe, C. Maestre, C. Journet, V. Garnier, G. Feve, J. M. Berroir, C. Voisin, B. Placais, E. Baudin
Article
Materials Science, Multidisciplinary
Sebastien Roux, Christophe Arnold, Fulvio Paleari, Lorenzo Sponza, Eli Janzen, James H. Edgar, Berangere Toury, Catherine Journet, Vincent Garnier, Philippe Steyer, Takashi Taniguchi, Kenji Watanabe, Francois Ducastelle, Annick Loiseau, Julien Barjon
Summary: Using a time-resolved cathodoluminescence system, the radiative lifetime of free excitons in hBN was estimated to be 27 ns at room temperature, much shorter than in other indirect band gap semiconductors. This is due to the close proximity of the electron and the hole in the exciton complex, as well as the small energy difference between indirect and direct excitons, explaining the unusually high luminescence efficiency of hBN for an indirect band gap.
Review
Materials Science, Multidisciplinary
Camille Maestre, Berangere Toury, Philippe Steyer, Vincent Garnier, Catherine Journet
Summary: Hexagonal boron nitride (hBN) is crucial in 2D material-based technologies, with a focus on high crystal quality, purity, and defect density for new optoelectronic applications. Self-standing hBN crystals offer high-quality nanosheets, and their synthesis process is key to ensuring crystal size, purity, and defects are well-controlled and understood.
JOURNAL OF PHYSICS-MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Boitumelo Matsoso, Wenjun Hao, Yangdi Li, Victor Vuillet-a-Ciles, Vincent Garnier, Philippe Steyer, Berangere Toury, Catherine Marichy, Catherine Journet
JOURNAL OF PHYSICS-MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Yangdi Li, Vincent Garnier, Philippe Steyer, Catherine Journet, Berangere Toury
ACS APPLIED NANO MATERIALS
(2020)