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Showing 1 to 17 of 17 for “"LINEAR SHRINKAGE"”.
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΗΣ ΓΡΑΜΜΙΚΗΣ ΣΥΣΤΟΛΗΣ ΤΩΝ ΑΛΓΙΝΙΚΩΝ ΑΠΟΤΥΠΩΤΙΚΩΝ ΥΛΙΚΩΝ
THE AIM OF THIS STUDY IS TO INVESTIGATE THE LINEAR SHRINKAGE OF ALGINATE IMPRESSION MATERIALS. 17 HYDROCOLLOID ALGINATES, 3 SILICONISED ALGINATES AND VOCOLOIDWERE STUDIED. THE MEASUREMENTS WERE MADE WITH A LINEAR VERNIER MICROSCOPE CAPABLE OF MEASURING TO 0,01 MM THE INITIAL MEASUREMENT WAS MADE 10 …
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Suitability of Thulamela Clays for Use in The Ceramic Industry: A Case Study in Thulamela Municipality, Limpopo Province, South Africa
… clays' strength, cracking, water absorption, and linear shrinkage during and after firing at different temperatures (300°C, 700°C, 800°C, 900°C, and 1150°C), aiming to assess their potential for ceramic use. The study analysed the physical and chemical properties of clays from various locations. …
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High-dimensional covariance estimation with applications to functional genomics
… 2 introduces a flexible and scalable Bayesian linear shrinkage covariance estimator. This accommodates multiple shrinkage target matrices, allowing the incorporation of external information from an arbitrary number of sources. It is also less sensitive to target misspecification and can …
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Materials systems for low shrinkage metal skeletons in three dimensional printing
… of the necks during the sintering step causes a shrinkage of the part which, in general, is not uniform and has a certain amount of error associated with it. With this method, the magnitude of the shrinkage is 1.5% and the uncertainty is 0.2%. The 3DP process can compensate for predicted …
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Measurement of electromagnetic signal velocities in saturated fine-grained soils
… between low and high frequencies relate to linear shrinkage. These relationships have wide-ranging uses in engineering, including rapid index testing, geo-hazard monitoring, improved electromagnetic field surveys, and researching the properties of soil porewater.
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Time dependent flexural analysis of reinforced concrete members
… of time dependent deformations that are known as shrinkage and creep, can produce substantial deformations and deflections to the structure. The mechanics of quantifying the serviceability deflection of RC beams is complex due to flexural cracking and the associated partial interaction (PI) …
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Development of a co-dispersion binder for the three-dimensional printing process to facilitate handling of ceramic casting shells in the green state
… was quantified by additional criteria such as shrinkage, warping, and binder stability. Average linear shrinkage in parts printed with co-dispersions was 0.05% after firing at 900°C. A simple model for warping, based on elastic response of a plate to free thermal strain, predicts that flat …
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Fabrication of 316-L stainless steel and composite micro machine components using softlithography and powder metallurgy process
… is also adopted to improve the densities and linear shrinkages of the stainless steel green and sintered micro components. A new mixing method is used to improve the homogeneity of the ceramic inclusions in the stainless steel matrix of the composite micro components. Characterization of the …
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Steam Cured Self-Consolidating Concrete and the Effects of Limestone Filler
… performance (rapid chloride permeability, linear shrinkage, sulfate resistance, freeze-thaw resistance and salt scaling resistance) of various self-consolidating concrete mix designs containing 5% silica fume and steam cured at a maximum holding temperature of 55°C. This research also …
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Fabrication and characterization of hollow silica aerogel spheres using sol-gel processing in the dual nozzle generation system
… for the elimination of residual solvents without shrinkage and cracking of hollow spheres. To monitor the hydrolysis and polymerization reactions FTIR (Fourier Transform Infrared Spectroscopy), and $\sp1$H, $\sp{29}$Si, and Solid-State NMR (Nuclear Magnetic Resonance) were used. The …
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Thermo-mechanical model of steel shell behavior in continuous slab casting
… the effects of heat conduction, solidification, shrinkage, non-uniform superheat dissipation due to turbulent fluid flow, thermal distortion of the mold and the visco-plastic mechanical behavior of the steel. Coupling between the thermal and the mechanical portions of the model are based on the …
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Sub-micron Patterning of ZnO-PMMA Hybrid Films
… glass. The SiOC was shown to be have interesting shrinkage properties where the feature-level linear shrinkage was up to 5% more than that of the bulk. The features were shown to be stable during pyrolysis up to 1000°C and stable at operating temperatures up to 1000°C. A constant number Monte …
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Enhancing the engineering properties of expansive soil using bagasse ash, bagasse fibre and hydrated lime
… change against fluctuations of moisture content. Shrinkage and expansion of soil can commonly take place near the ground surface, where it is directly subjected to seasonal and environmental variations. Construction of civil engineering structures on expansive soils is highly risky, as this type …
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An investigation into the volume change characteristics of loess like soil in Mount Moorosi Village in Lesotho
… had significant warping (up to 27 mm) in linear shrinkage that illustrated potential inducement of detrimental stresses to the superimposed structures during drying. The identification and quantification of the mineralogy composition clearly evidenced the passive minerals (quartz, feldspar …
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Use of sol chemistry and fine grained precursors in the production of controlled microstructural polycrystalline continuous oxide fibres
… between 900 - 950°C was critical, as up to 26% linear shrinkage would result. The formation of nano porous y-alumina was apparent from low angle XRD scans and concurred from Al27 solid state NMR analysis which manifested itself as deformations in the fibre longitudinally resulting in "kinks" …
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Influence of firing temperature on ceramic properties of kaolinitic clays from Duthuni, Limpopo Province (South Africa)
… measured by weight loss (WL), bulk density (BD), linear shrinkage (LS), water absorption (WA) and flexural strength (FS). The characteristic mineral assemblage comprised; quartz + kaolinite ± mica + microcline + goethite + hematite + anatase + ilmenite. Quartz occurred as major constituent in both …
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Fabricating Complex-Shaped Components by Room-Temperature Injection Molding of Aqueous Ceramic Suspension Gels
… technique was found to reach 98%TD with linear shrinkage of</p> <p>The room-temperature injection molding technique was later adapted to ZrB<sub>2</sub>, a leading UHTC material that was difficult to fabricate into complex shapes due to its high melting temperature (>3000°C) and …