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Showing 1 to 20 of 60 for “"Hot Pressing"”.
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Creep of olivine during hot-pressing.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Changes in Oriented Strandboard Permeability During Hot-Pressing
Convective heat transfer during hot pressing in wood-based composite panel manufacturing is widely accepted as the most important means of heat transport for resin curing. The rate of convective heat transfer to the panel core is controlled by its permeability. Permeability in the plane of the …
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Hot-pressing of quartz powder to .5 GPA pressure and 1250C̊
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1980.
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Modeling the Transient Effects during the Hot-Pressing of Wood-Based Composites
… The number of interacting variables during the hot-compression process is prohibitively large to assess a wide variety of data by experimental means. Therefore, the main advantage of the model based approach that the effect of the hot-compression parameters on the final properties of wood-based …
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The effect of hot-pressing parameters on resin penetration and flakeboard layer properties
… to determine how they were influenced by various pressing parameters. The evenness of penetration was found to be a function of the natural variability of the wood and was not influenced by the pressing parameters of temperature, moisture content, pressure, or time. These four parameters were …
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Reaction processing for the development of ultra-high temperature ceramics
… to produce dense ZrB₂ ceramics; conventional hot pressing, reactive hot pressing, and pressureless sintering"--Abstract, page iv.
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Experimental studies of the thermoelectric properties of microstructured and nanostructured lead salts
… path. Samples of PbTe and PbSe were prepared by hot pressing nano-size and micro-sized particles and the thermal diffusivity, the Seebeck coefficient, and the electric conductivity of the samples were measured. The samples made from the nano-sized particles showed no reduction in thermal …
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Consolidation of Al-TiO₂ and Ti₃Al-Ai₂O₃ composite powders
Pressureless sintering, hot pressing and sinter-HIP of Ti₃Al-Al₂O₃ and Al-TiO₂ composite powders have been carried out under inert atmospheres. The Al-TiO₂ composite powders were produced by discus milling Al/TiO₂ powder mixtures followed by ball milling. The Ti₃Al-Al₂O₃ composite powders were …
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Processing and Characterization of Silicon-Carbide Whisker/alumina Matrix Composites
… of greater than 99.5% density were produced by hot pressing mixtures of submicron $\rm Al\sb2O\sb3$ powder and SiC whiskers. Two sources of whiskers were utilized, Silar SC-9 whiskers from Arco Metals Co. and SCW # 1-S whiskers from Tateho Chemical Industries Co. Ltd.
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Processing and characterization of boron carbide-hafnium diboride ceramics
… processing. Boron carbide additives reduced the hot pressing temperature of HfB₂ by 150⁰C compared to carbon, which reduced the hot pressing temperature by ~50⁰C. Reduction of oxide impurities alone could not explain the difference in sintering enhancement, however, and other mechanisms of …
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Microstructural And Mechanical Characterization Of Al-al2o3 Nanocomposites Synthesized By High-energy Milling
… by (i) magnetic pulse compaction (MPC) (ii) hot-isostatic pressing (HIP), (iii) vaccum hot pressing (VHP), and (iv) a combination of vaccum hot pressing and hot-isostatic pressing (VHP+HIP). However, successful consolidation of the powders to near-full density was achieved only through …
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The Formation and Reactivity of BORON CARBIDE and related materials
… monolithic components can only be achieved by hot pressing at pressures between 200 and 300 Kgcm-2 and at temperatures above 2000°C preferably at about 2,300°C for the most rapid achievement of theoretical density, i.e. pore free.
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Effect of Cellulose Nanocrystals on the Rheology, Curing Behavior, and Fracture Performance of Phenol-Formaldehyde Resol Resin
… resin and CNC–resin mixtures, using different hot-pressing times. Fracture energies were measured by mode I cleavage tests. Bondline characteristics were analyzed by light microscopy. At a hot-pressing time of 10 min, the fracture energy decreased with increasing CNC content, whereas it stayed …
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Microstructural development, phase stability, and toughening in mullite matrix composites
… zirconia and/or SiC whiskers were fabricated by hot pressing of powders which had been prepared from Al, Si, Zr, and Mg (or Y) alkoxide precursors by a sol-gel process. A series of studies were conducted on microstructural evolution, oxidation behavior and toughening mechanisms, in order to …
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Tunable viscoelasticity, morphology, and charge transport of dynamic covalent polymers
… could be reprocessed and recycled using hot-pressing without significant degradation, unlike salt-free systems. In a second project, polymer networks with tunable ratios of neutral and ionic dynamic crosslinks were synthesized, and their composition was quantitatively characterized by 11B …
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Structure and properties of titanium nitride-strengthened microlaminate metal matrix composites
… and aluminum foils which were subsequently hot pressed to form microlaminate composites. The TiN volume percent was varied and its effect upon the structure and properties of the composites investigated. Scanning electron microscopy (SEM), cross-sectional transmission electron microscopy …
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Investigation on fabrication, interface formation, and properties of hot-processed titanium-doped copper/diamond composites
… copper/diamond composites fabricated via hot-processing techniques, hot-forging and hot-pressing, with focuses on optimizing fabrication parameters, elucidating interface formation mechanisms, and establishing the relationship between the interfacial microstructure and composites …
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Heat transfer in nano/micro multi-component and complex fluids with applications to heat transfer enhancement
… solid volume fraction, φ<10%), heat transfer in hot pressing of fiber suspensions and thermal performance of particle filled thermal interface materials (high solid volume fraction, φ>40%) are investigated. The effects of flow disturbance due to movement of suspended particles, thermo-physical …
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Development of a Self-Heating Consolidation Procedure for 3D-Printed Continuous Wire Polymer Composite Laminates
… procedure used resistive heating combined with hot-pressing to reduce the internal voids. Image processing of sample cross sections proved the void content in consolidated samples were 91.6% lower compared to unprocessed, while flexural tests found 5% and 12% higher flexural strength and …
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Simulation based modeling of the elastic properties of structural wood based composite lumber
… The study included the assessment of the orthotropic mechanical properties of the raw material, the effect of densification it experiences during the hot-pressing procedure, and the geometric structure of the composites. Using the results of these investigations, computer models were created …
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