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Microstructure and soft magnetic properties of three bulk amorphous and nanocrystalline Fe 78 Si 9 B 13, Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 and Fe 84 Nb 7 B 9 alloys prepared by consolidation at a ultra-high pressure (5.5 GPa) were investigated. The bulk alloys consisting of not only amorphous phase but also nanocrystalline α-Fe phase had …
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Figure 1 illustrates the effect of curing time, pressure and initial w/c ratio on the compressive strength of pastes prepared by high pressure (with- out heating) from a typical I cement. These results are roughly comparable with those of previous workers (Bajza, Franco and Skalny, 1968; Lawrence, 1969; Bajza, 1972). Note that the lowest w/c ...
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Searching for new superconductors at high pressures is promising mainly because of two effects that pressure has on materials. In metals, pressure-induced structural phase transitions can generate ...
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In this work, we investigated the microstructure and magnetic properties of FeCoNi (Al) high-entropy alloys (HEAs) prepared by high-pressure solidification (HPS). The results show that incoherent nanoprecipitates distributed in uniaxial grain uniformly, which significantly reduces the average magnetic anisotropy of the alloys.
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The O/W emulsions were prepared with MCT (oil phase), DOM, and food-grade polysaccharides (GG, XG, and Pec, respectively) by high-pressure homogenisation at 10 MPa for 5 min. The droplet distribution (including droplet diameters and PDI), ζ-potential and pH values of the emulsions are shown in Table 2 .
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The high-pressure torsion method, first introduced by Bridgman in 1935, 18 has received extensive attention as a top-down severe plastic deformation (SPD) technique in creating ultrafine-grained micro-structures with novel physical properties. 19 HPT produces high-density crystal defects and grain boundaries, which acting as pinning …
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Tan and Nakajima (2005a) successfully prepared β-carotene nanodispersions using an emulsification and evaporation technique with high pressure homogenization and studied their physicochemical properties. They also investigated the influence of phase ratio and homogenization pressure and cycle on particle size parameters and β-carotene …
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Pectic-oligosaccharides (POSs) were prepared from apple pectin by dynamic high-pressure microfluidization (DHPM). Operating under selected conditions (pectin concentration 1.84%, solution temperature 63 °C, DHPM pressure 155 MPa and number of cycles 6 passes), 32.92% of the pectin was converted into POS.The resulting …
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High blood pressure (hypertension) is diagnosed if the blood pressure reading is equal to or greater than 130/80 millimeters of mercury (mm Hg). A diagnosis of high blood pressure is usually based …
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The Vickers hardness of the bulk TaB and nano-TaC ceramics sintered at high pressure and high temperature were measured by using a diamond indentation method. Our tests gave a maximum Vickers hardness of 13.9 GPa for TaB, and 19.2 GPa for nano-TaC ceramics under a load of 29.4 N. The hardness of nano-TaC-5 wt% Co …
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Hardness measurements for high-pressure prepared TaB and nano-TaC ceramics. Authors: Haihua Chen. Hao Liang. Southwest University of Science and …
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2.3 High pressure batch ing method. The schematic and notations of our gas ing chamber are shown in Fig. 1. This system owns a chamber made of high-pressure stainless steel. The supercritical CO 2 as the blowing agent supplies to the chamber through a mass flow meter.
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Aim for foods rich in potassium, magnesium and calcium to lower your blood pressure . Banana. Oranges. Apricots. Melon, like cantaloupe, honeydew and watermelon. Dark leafy greens, like spinach and kale. Potatoes. Sweet potatoes. Winter squash, like acorn or butternut.
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The microstructures, mechanical properties, thermal conductivities, and corrosion behavior of novel high-thermal-conductivity hypoeutectic Al-Si alloys, prepared by rheological high-pressure die-casting (Rheo-HPDC) and …
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CI of complexes and IBC of homogenized corn starch paste are shown in Fig. 1.The IBC (Fig. 1 (A)) value increased as the homogenization pressure increased, reaching a plateau about 1.43 at 80 MPa, and then the extent of variation is quite small when pressure varies from 80 MPa to 120 MPa.The high pressure and high shear force …
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Nanoemulsions were prepared according to the high pressure homogenization technique (Stang et al. 2001). Briefly, 6 g of soybean oil were added dropwise to a 2% (w/v) of polysorbate 80 water solution (44 mL) under high-speed stirring (Ultraturrax T25 basic, IKA ® Werke & Co.KG, Staufen, Germany) to obtain an …
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Interpenetrating-phase BMG composites with large tensile plasticity were prepared successfully by high pressure die casting. • The composites display metallurgical bonding between matrix and reinforcement. • The excellent mechanical properties mainly originate from a proposed mutual-reinforcement mechanism. •
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Contrasted with the E 2 (high) mode (652.2 cm −1) of the AlN powder, the position of the E 2 (high) mode of the AlN bulk material prepared by high pressure is observed at 659.9 cm −1. A Raman shift of 7.7 cm −1 had taken place. This indicates that compressive stress remained in the AlN bulk material sintered under the condition …
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4. Conclusions. Fully dense 93W-5.6Ni-1.4Fe tungsten alloy with an ultrafine grain size of 271 nm, high relative density of 98.6% and high dislocation density of 2.6 × 10 16 m −2 was successfully fabricated by spark plasma sintering under a high pressure of 150 MPa and a low temperature of 950 °C.
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When the HEAs prepared by SPS, the pressure is usually dozens of MPa. In order to gaining high density, the sintering temperature will be high leading to a large grain size. ... In-situ high-pressure XRD experiments with a wavelength of 0.6199 Å and a focused beam size of about 26 × 8 μm 2 were performed at the beamline 4W2 of Beijing ...
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Fig. 1 a shows the X-ray diffraction patterns of the as-prepared B 4 C-cBN composites with different cBN content after high pressure sintering. The optical image of the mirror-polished sample with 50 wt.% cBN is shown in the inset of Fig. 1 a. Clear diffraction peaks corresponding to B 4 C and cBN are detected, indicating that there is no …
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In this study, the feasibility of preparing oxhide gelatin from cowhide scrap by high pressure assisted-liquid extraction was verified. Different processing conditions, including high pressure time (15 to 25 min), pressure (250 to 350 MPa), and liquid-to-solid ratio (1:3 to 1:5), were optimized thro …
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The high pressure and high temperature sintering of alpha-Si3N4 and gamma-Si3N4 with Y2O3-Al2O3-La2O3 as additives were studied under pressures of 5.4 GPa and temperatures of 1420-1770 K.
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The high pressure and high temperature (HPHT) method has been intensively investigated to be an effective way for synthesizing phase-pure, bulk and …
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CaCu3Mn2Te2O12 was synthesized using high-temperature and high-pressure conditions. The compound possesses an A- and B site ordered quadruple perovskite structure in Pn3̅ symmetry with the charge combination of CaCu32+Mn22+Te26+O12. A ferrimagnetic phase transition originating from the antiferromagnetic interaction between …
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In the multiple emulsion solvent evaporation method a high pressure microf … Effect of microfluidization parameters on the physical properties of PEG-PLGA nanoparticles prepared using high pressure microfluidization J Microencapsul. 2009 Sep;26(6):556-61. doi: 10.1080/02652040802500655. ...
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High-pressure torsion (HPT) is a severe plastic deformation technique where a sample is subjected to torsional shear straining under a high hydrostatic pressure. The HPT method is usually employed to create ultrafine-grained nano-structures, making it widely used in processing many kinds of materials such as metals, glasses, biological …
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High pressure enables the creation of new materials mainly through four routes, as discussed below. Routes for new high-pressure materials. Producing new …
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Call 911. Be prepared. If you have been diagnosed with high blood pressure, track your blood pressure and medications. If possible during an emergency, having these logs with you can provide …
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Abstract. High-pressure torsion (HPT) is a severe plastic deformation technique where a sample is subjected to torsional shear straining under a high hydrostatic pressure. The HPT method is usually employed to create ultrafine-grained nano-structures, making it widely used in processing many kinds of materials such as metals, glasses ...
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