Thermo-emf in Si–Ge solid solution whiskers
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Blends of Thermoplastic Polyurethane and Polypropylene
Thermoplastic polyurethane (TPU) was blended with thermoplastic polypropylene (PP) in different weight percentages in a twin-screw extruder and characterized by dynamic mechanical analysis (DMA) and X-ray analysis. Mechanical properties were also measured. Viscoelastic and mechanical properties of pure thermoplastic p…
Current transformer module basing the Jiles-Atherton hysteresis model in EMTP/ATP simulation
The topic of this paper is to construct the module of the current transformer (CT) basing the Jiles-Atherton (J-A) hysteresis model in electromagnetic transient program (EMTP) and alternative transient program (ATP) simulation. The J-A hysteresis model constitutes of first-order ordinary differential equations and has…
Refractive Indices Of Liquid Crystals And Their Applications In Display And Photonic Devices
Liquid crystals (LCs) are important materials for flat panel display and photonic devices. Most LC devices use electrical field-, magnetic field-, or temperature-induced refractive index change to modulate the incident light. Molecular constituents, wavelength, and temperature are the three primary factors determining…
Hydrogen-bonded liquid-crystalline polyurethane complexes with 4-dodecyloxybenzoic acid
We prepared novel hydrogen-bonded liquid-crystalline polyurethane complexes from 4-dodecyloxybenzoic acid and polyurethane containing pyridyl units in the main chain, based on 2, 6-bis(hydroxymethyl) pyridine. The complexes were investigated by differential scanning calorimetry, polarizing optical microscopy, and X-ra…
Influence of Fabric Softeners on Performance Stability of the Textile Materials
The aim of the research was to explore the effect of household fabric softeners on the textile hand rates after repeated washing cycles. The behavior of three pure cotton and one cotton-PES blended textile materials, which were different in type, structure, thickness and finishing, were investigated in the multifold w…
A survey of test methods for scale adhesion measurement
The spallation of oxide scales from the steam side of tubes in power generation boilers can severely limit component life time. The process involves through scale cracking and crack propagation at or parallel to the scale/alloy interface. Many techniques have been developed in the past two decades to assess the interf…
The P1s and P2p XAFS Spectra of Elemental Phosphorus, Theory and Experiment
X-ray absorption spectroscopy was used to study the local structure and chemical bonding of elemental phosphorus. Three allotropes of this element exist in the solid state. The most common of these is the amorphous red phosphorus. The other two are crystalline: white phosphorus and black phosphorus. In the gas phase t…
The role of zinc in the vulcanisation of styrene-butadiene rubbers
There is pressure on the rubber industry to reduce, or even remove, the zinc oxide used in rubber compounds, because of concerns that zinc chemicals may have adverse effects on the aquatic environment. An EUsupported project, entitled Ecozinc, was set up to determine the scope for reducing, or eliminating, the zinc ch…
Microstructure Evolution of Oxide Films Formed on Zircaloy-4 during Autoclave Tests
The microstructure and crystal structure of oxide films in different depth of oxide thickness, and the morphology of fracture surface of oxide films, which are formed on Zircaloy-4 specimens during the autoulave tests in deionized water at 360 ℃/ 18.6MPa, have been investigated by transmission electron mi- croscopy, s…
OPTIMIZATION OF CORONA RING DESIGN FOR EHV COMPOSITE INSULATOR USING FINITE ELEMENT AND NEURAL NETWORK METHOD
A method to optimize the location and the dimensions of the corona ring is presented for EHV transmission line composite insulators. This method is used to handle the open boundary problem of the insulator model by means of the asymptotic boundary conditions. Then, in order to set the optimal goal, the finite element…
Indications of ferrolysis and structure degradation in an Estcourt soil and possible relationships with plinthite formation
Geographic associations of duplex soils, like the Estcourt form, and plinthic soils, like the Avalon and Westleigh forms, such as are found in the Eastern Free State, are recognised worldwide. These soils share redox morphology. In duplex soils, the redox morphology is dominated by a contrast in clay content between t…
Elucidation for Electro-chemical Degradation of Cross-linked Polyethylene Insulated Power Cable
The water treeing phenomenon has been recognized as an ultimate difficulty for long-term service life of cross-linked polyethylene (XLPE) insulated power cables. Elucidation of substantial mechanistic pathway of water treeing is quite important to suppress water treeing. Many factors which affect water treeing have be…
Behavior of Hybrid Wood Plastic Composite-Fiber Reinforced Polymer Structural Members for Use in Sustained Loading Applications
In the design and construction of waterfront structures, there is a need for development of a corrosion resistant, lightweight, cost effective and environmentally friendly structural material. Hybrid wood-plastic composite (WPC) - fiber-reinforced polymer (FRP) structural members would be corrosion resistant, and rela…
Recent Trends and Future Subjects on High Temperature Corrosion Prevention Technologies in High Efficiency Waste-to-energy Plants
Corrosion prevention methods of materials are key technologies to increase in power generation efficiency, reduce in environmental pollution and realize maintenance-free in the waste-to-energy plants. Corrosion environment have became severe condition according to social demands such as increase in calolific value of…
High-Performance Polymer Electret for Micro Seismic Generator
Development of micro seismic generator for energy harvesting applications is presented. In order to fabricate MEMS-friendly high-performance electret film, CYTOP is adopted as an electret material and the charge density and the charge stability of CYTOP is experimentally characterized. When corona charging is employed…
Construction of conjugated molecular structures on gold nanoparticles via the Sonogashira coupling reactions
Functional, conjugated molecular structures have been fabricated on Au nanoparticles via the Sonogashira coupling reactions.
Anisotropic photonic crystals and microcavities based on mesoporous silicon
A technique to prepare one-dimensional anisotropic photonic crystals and microcavities based on anisotropic porous silicon exhibiting optical birefringence has been developed. Reflectance spectra demonstrate the existence of a photonic band gap and of an allowed microcavity mode at the photonic band gap center. The sp…
Effect of Anisotropy of Surface Energy on the Growth Direction of Solid Phase in Constrained Growth Condition
The growth direction of solid phase, which has a great influence on the grain selection, has been investigated. Transparent organic systems, succinonitrile–H2O alloy and pivalic acid–H2O alloy have been used for unidirectional solidification. Essential parameters of phase diagrams, distribution coefficient of H2O (k)…
A Method for Measuring the Strength of Scale Deposits on Heat Transfer Surfaces
Abstract The technique of fluid dynamic gauging has been successfully applied to assess the adhesion characteristics of thin (< 1 mm) layers of calcium sulphate deposits serving as mimics of mineral scales often found on heat transfer surfaces. The shear strength of the scale layers increased on ageing; layers aged…