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Showing 1 to 20 of 43 for “"Spark plasma sintering"”.
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Production of a nanostructured copper by Spark Plasma Sintering
… of the production of a nanostructured copper by Spark Plasma Sintering. The nanostructured powder was produced by cryomilling an atomized powder, using a ball-to-powder ratio of 30:1 for 8h; it has a mean grain size of 19±2 nm and shows quite a high thermal stability, as shown by a DSC …
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Cryomilling and Spark Plasma Sintering of 2024 Aluminium Alloy
… milling of powders and their consolidation by sintering techniques characterized by a low thermal load in order to minimize grain growth. This is an alternative approach to other methods based on severe plastic deformation, with the advantage of obtaining near-net shape parts, within the limits …
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Composites multifuncionales de alúmina sinterizados por Spark Plasma Sintering
… preparados: la sinterización por descarga de plasma o Spark Plasma Sintering (SPS). Dicha técnica presenta como peculiaridades la aplicación simultánea de presión y temperatura, así como la posibilidad de aplicación de una amplio rango de velocidades de calentamiento (desde menos de 1ºC/min …
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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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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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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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Deformation mechanisms in bulk nanostructured aluminum obtained after cryomilling and consolidation by spark plasma sintering
… (UF) aluminum was produced after cryomilling and spark plasma sintering consolidation process. The samples obtainedwere plastically deformed in uniaxial compression. We show that there is a significant fraction of plastic strain (11%) that can be recovered after unloading. High-energy synchrotron …
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Development of High Entropy Alloys for High Temperature Applications
High Entropy Alloys, Spark Plasma Sintering, Ball milling, AlCoCrFeNI HEA, CO- Free HEA, Oxidation, Corrosion
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Processing, microstructure, and properties of carbon nanotube and silicon carbide composites
This thesis describes the spark plasma sintering of silicon carbide and silicon carbide with multi-walled carbon nanotubes. The work was completed to investigate the processing, microstructure, and properties of such materials. Various ceramic engineering techniques aided this investigation …
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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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Synthesis, characterization, and properties of carbide dispersion-strengthened tungsten alloys for use as a plasma-facing material in nuclear fusion reactors
Tungsten is the material of choice for plasma-facing components in future plasma-burning fusion reactors because of its high melting point, high sputter threshold, and low hydrogenic species retention. However, tungsten is an intrinsically brittle material, displaying no room temperature ductility …
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Synthesis and Electrochemical Performance of Lithium Lanthanum Titanate Solid-state Electrolyte
… of LLTO based materials were developed: spark plasma sintering technology, oxygen vacancy manipulation and SiO2 doping. Spark plasma sintering technology enhances the processing methodology of LLTO to prevent lithium-ions loss at grain boundary, thus improving the grain boundary …
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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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Deciphering the role of dispersoids in dispersion-strengthened tungsten alloys on the mechanical properties and irradiation- driven response under nuclear fusion reactor-relevant conditions
Tungsten is the material of choice for plasma-facing components in future plasma- burning fusion reactors because of its high melting point, high sputter threshold, and low hydrogenic species retention. However, tungsten is an intrinsically brittle material, displaying no room temperature ductility …
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Graphite immobilisation in glass composite materials
… graphite prepared by microwave, conventional and sparks plasma sintering methods. Several potential glass compositions namely iron phosphate, aluminoborosilicate, calcium aluminosilicate, alkali borosilicate and obsidian were considered for the immobilisation of various loadings of graphite …
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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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High-throughput synthesis of functional oxide films
… deposited on dense LaAlO3 ceramics prepared by spark plasma sintering. Piezoforce microscopy was used to confirm the local ferroelectric properties. Thirdly, we investigate the growth of of metastable monoclinic Dy2Ti2O7 epitaxial films on polycrystalline La2Ti2O7 substrates. We conclude that …
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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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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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