Materials Literature
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Tri-(1, 4-butanediol single-butyrate) citrate (TBBC) was synthesized as a new plasticizer for PLA. The chemical structure of TBBC was characterized by FT-IR. PLA was plasticized with various amount of TBBC. The effects of both temperature and shear rate on the rheologies of PLA/TBBC blends were evaluated by a parallel…
Melt quenching of B2O3 with less than 25 mol. % rare-earth oxide (RE2O3) at ambient pressure results in a milky white glass because of liquid-liquid phase separation into B2O3 and RE2O3·3B2O phases. In contrast, we have found that melt quenching under GPa-order pressure realizes a transparent RE-doped B2O3 glass. This…
We propose an anti-symmetric grating structure for effective excitation of the short-range surface plasmon polariton (SR-SPP) mode of a metal stripe waveguide. The structure consists of two corrugated Bragg gratings offset by half of a period formed on the two sides of the metal stripe, respectively. The SR-SPP mode i…
The dielectric spectrum of CaCu3Ti4O12 samples prepared by traditional "one step" ceramic technology is analyzed. It is established that the characteristic Debye-type dispersion with an activation energy 0, 075 eV manifests in the high-frequency range (f ~ 106 Hz). In the low-frequency region (f< 102 Hz) a transition…
High-power pulsed sputtering (HPPS) penning discharge is featured that the plasma is generated at a narrow gap consisting of a pair of cathodes as sputtering target in parallel each other. The magnetic field is provided by setting a set of permanent magnets behind the targets and the electric field is parallel to the…
In industrial practice of rolling and hot forging, i.e. extrusion-type forging, abruptchanges in strain rate during the deformation of the material occur. For accurate numericalsimulation of a forging process, the experimental investigation of the effect of the transient changein strain rate on plastic flow behaviour…
Multimodale plasmonische Resonanzen: Silicium-Nanodrähte, die räumlich kontrollierte, axial angeordnete dotierte Regionen enthalten, wurden synthetisiert und mittels IR-Spektroskopie im mittleren IR-Bereich untersucht (siehe Bild; P=Partialdruck). Die Drähte zeigen multimodale lokalisierte Oberflächenplasmonenresonanz…
Due to advancements made in 3D weaving process [1] and, in order to develop 3D textile structure as reinforcement of composite material for aeronautic application, a good prediction of the geometry and the mechanical properties of the 3D woven unit cell is required. Due to the complexity of these textile architectures…
Picture frame shear tests are state of the art for determining the shear force vs. shear angle behaviour for in-plane deformation of most technical textiles, such as woven fabrics. Many publications describe this test and the used picture frames. Benchmark tests showed that the measured shearing behaviour for one samp…
The question of the recycling of the polyurethane (PU) foam, especially in the automotive industry represents one of the main technology thrust and challenge of the car manufacturers and the Original Equipment Manufacturers’ (OEM) since 2000. Indeed, it is nowadays necessary for car industry to promote ecological meth…
Solar Energy is a kind of green and renewable energy, and solar cells can be used to convert solar energy to electricity. Due to the requirements of carbon reduction and energy saving as well as the policy of Government incentive, the installation of solar energy system is becoming more and more popular. However, the…
Textures of rolled sheets are typically orthotropic along the mid-thickness plane, where the material undergoes plane strain compression. At the surface and in the subsurface layers, however, the achievement of the orthotropic symmetry can be impeded due to friction between the sheet and the rolls. The through-thickne…
In this paper the compression behaviour after different pre-strain and different shear angle of steel and glass fibre knitted fabrics will be analysed. These types of materials are used during the production of automotive windshields and other glasses in a car. The production of a windshield involves a step whereby th…
ABSTRACT In this work, we investigated the effect of four different configurations at the exit of a single‐screw extruder on the induction of beta phase in PP for four different rotational speeds. The configuration of a breaker plate with 120 orifices of 1‐mm diameter and 7‐mm length each, give the highest content of…
The standard uniaxial tensile test is the widely accepted method to obtain relevant properties of mechanical characterization of sheet metal materials. However the range of strain obtained from tensile test is limited. The bulge test is an alternative to obtain ranges of deformation, higher than tensile test, thus per…
Over the past years, high-k dielectrics have been incorporated into modern semiconductor devices. One example is ZrO2, which has been introduced in memory applications. This paper elucidates some difficulties with pure ZrO2 like unintended crystallization during the growth of the dielectric and the evolution of the mo…
Abstract: A new concept of incremental equal channel angular pressing (I-ECAP) with converging billets is proposed and simulated numerically. It follows a recently introduced process of ECAP with converging billets, in which the contact surface between converging billets plays the same role as a movable die wall in th…
Researchers from the United States Department of Agriculture and Texas Tech University have published the establishment of a set of reference cottons with known fiber maturity and linear density (fineness) values. Their work was based on careful analysis of the dimensions of a large number of individual transverse fib…
Improving tumor delivery of lipophilic drugs through identifying advanced drug carrier systems with efficient carrier potency is of high importance. We have performed an investigative approach to identify parameters that affect liposomes' ability to effectively deliver lipophilic camptothecin (CPT) to target cells. CP…
In the field of sheet metal forming traditional forming processes are used. However, a quasi-static forming process combined with a high speed forming process can enhance the forming limits of a single one. In this paper, the investigation of the process chain quasi-static deep drawing – electromagnetic forming by mea…