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Showing 1 to 20 of 24 for “"spark plasma sintering (SPS)"”.
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Electroless Nickel Plating and Spark Plasma Sintering of nano ZrO2 for Mechanical Property Enhancement
… of combined electroless nickel plating (ENP) and spark plasma sintering (SPS) was used to determine the feasibility of fracture toughness improvement of ZrO2. Nano-grained yttria stabilized zirconia (YSZ) particles of 100nm average diameter were coated with about 1-5 nm of nickel coating by ENP. …
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Nanostructured ceramic-metal composite materials of technological interest.
… y el uso de la novedosa técnica de sinterización spark plasma sintering (SPS),
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ZrB2-SiC Based Ultra High Temperature Ceramic Composites: Mechanical Performance and Measurement and Design of Thermal Residual Stresses for Hypersonic Vehicle Applications
… were sintered using both Hot Pressing (HP) and Spark Plasma Sintering (SPS) techniques. The mechanical performance of the ZrB2-SiC composites was investigated using 3- and 4-point bending techniques for measurements of instantaneous fracture strength and fracture toughness. Resonant Ultrasound …
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Structural Characterization and Thermoelectric Performance of ZrNiSn Half-Heusler Compound Synthesized by Mechanical Alloying
… alloying (MA) and consolidation by either Spark Plasma Sintering (SPS) or hot pressing (HP). X-Ray diffraction patterns of as milled powders and consolidated samples were compared and analyzed for phase purity. Thermal conductivity, electrical conductivity and Seebeck coefficient are …
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Processing, Structure and Properties of High Temperature Thermoelectric Oxide Materials
… which were synthesized using conventional sintering and spark plasma sintering (SPS) techniques. In order to tailor the electrical and thermal properties, Lu and Ga co-doping was investigated in Ca3Co4O9 system. The effect of co-doping at Ca and Co sites on the thermoelectric properties was …
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DEVELOPMENT OF COST EFFECTIVE NANOSTRUCTURAL REINFORCEMENTS FOR ADVANCED COMPOSITES
… synthesis of carbon nanoreinforcements during sintering. The in-situ synthesized nanoreinforcements have demonstrated to be effective in improving mechanical properties in composites with various matrices including: ceramics, metallic and polymer (bio, organic and inorganic). Further, in this …
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Studies on Sintering Silicon Carbide-Nanostructured Ferritic Alloy Composites for Nuclear Applications
… composite materials (NFA-SiC) were sintered with spark plasma sintering (SPS) method and systematically investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), as well as density and Vickers hardness tests. Pure NFA, pure SiC, and their composites NFA-SiC with different …
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PVD COATING TREATMENT TOWARDS A SUSTAINABLE AND ECO-FRIENDLY MANUFACTURING SYSTEM
… characterization using mechanical alloying and spark plasma sintering (SPS). XRD confirmed the formation of a stable BCC structure for HEA films and an FCC NaCl-type structure for HEN films. Increasing substrate temperature from room temperature to 400 °C significantly improved crystallinity, …
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Production of steel matrix composites by mechanical milling and spark plasma sintering
… higher sinterability and finer microstructure. Spark plasma sintering (SPS) has been used for the consolidation. As reinforcement a harder high speed steel (HSS) and different ceramic powders (TiB2, TiC and TiN) have been selected. The production of HWTS/HSS blends has highlighted the negative …
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Optimization of High Entropy Borides for Advanced Applications
… the combination of two efficient synthesis and sintering techniques, i.e. Self-propagating High-temperature Synthesis (SHS) and Spark Plasma Sintering (SPS), respectively. The effect of the most important processing parameters, and additive introduction, in product characteristics will be …
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Sviluppo e caratterizzazione di materiali innovativi a base di idrossiapatite e vetro bioattivo
… important role during their consolidation using Spark Plasma Sintering (SPS) as well as strongly affect the characteristics of the resulting sintered bodies. A fully dense material without secondary phases was obtained by SPS at 900°C, when using the relatively small sized, with refined grains …
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Development of Li0.33La0.56TiO3 based Solid Electrolyte Materials
… characteristics, LLTO pellets were prepared by spark plasma sintering. To investigate alternation of grain and grain boundary resistance of the LLTO, Ag dopants were introduced to LLTO, and composite pellets of LLTO and silver nanowires were also fabricated. The LLTO synthesized by acetic acid …
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Materiales funcionales y estructurales basados en hexaluminato de calcio
… reactiva de hexaluminato de calcio mediante Spark Plasma Sintering (SPS) por mezcla de polvos, método no estudiado para este sistema hasta el momento. Los resultados obtenidos muestran que mediante el estudio de las variables de sinterización se obtiene CA6 con un porcentaje superior al 90% …
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Engineered Alumina / Silicon Carbide Laminated Composites
… Such laminate is able to develop, upon co-sintering, a spatial variation of residual stress with maximum compression at specific depth from the surface due to the differences in thermal expansion coefficient of the constituting layers. In the present work silicon carbide has been selected …
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Improvement of Thermoelectric Properties Through Manipulation of their Microstructure: the Effect of Graphene Reinforcement
… using powder metallurgy and fabricated by spark plasma sintering (SPS). The thermoelectric factors, magnetic behavior, microstructure, and mechanical properties of the samples were evaluated and analyzed. Grain growth inhibition is the main consequence of the reinforcing GNPs, which results …
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Production of strengthened copper materials by Mechanical Milling-Mechanical Alloying and Spark Plasma Sintering
… hardened copper materials have been sintered by Spark Plasma Sintering (SPS). Firstly the MM behaviour of Cu as function of milling time has been studied, it consists in three stages: flaking, welding and fracturing process. Since stearic acid has been added as process control agent (PCA), its …
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Processes and Materials for Space Exploration and Colonization
… Propagating High-temperature Synthesis (SHS) and Spark Plasma Sintering (SPS), is also considered to give a valuable contribution for making the production of such materials more efficient. Another crucial problem addressed in this Thesis, that highly affects the proposed space colonization of …
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Rhenium, osmium and iridium diborides by mechanochemistry: Synthesis, structure, thermal stability and mechanical properties
… and iridium boride powders. Densification by Spark Plasma Sintering (SPS), thermal stability and mechanical properties of h-OsB2 were also studied. ReB2 was recently reported to exhibit high hardness and low compressibility, which both are strong functions of its stoichiometry, namely Re to B …
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Consolidation of WC-Co nanocomposites synthesised by mechanical alloying
… alloying (MA) milling time, temperature, sintering method and microstructure on the mechanical properties of a tungsten carbide-cobalt (WC-Co) hardmetal, based on 10wt% Co, has been established. The effects of high-energy milling for 30, 60, 180 and 300 min and the interrelation between …
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Cerámicos refractarios a base de diboruro de circonio y aluminio: fabricación mediante SPS y caracterización
… los polvos mediante sinterización de chispa de plasma “spark plasma sintering” (SPS) y posterior caracterización composicional, microestructural y mecánica. El objetivo de la tesis es estudiar el efecto de la adición de aluminio como asistente para facilitar el proceso de sinterización y ver …
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