Materials Literature
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The mechanism of UV and EB cure processes for porous low-k SiCOH materials was investigated by using experimental results obtained using PECVD and SOD films as well as simulated results. Both UV and EB cures induced dielectric constant change and Young's modulus improvement because Si-OH elimination (moisture removal)…
High production machining at high cutting velocity and feed generates large amount of heat and high cutting temperature, which shortens the tool life and deteriorates the job quality. This problem becomes more acute when the jobs are difficult to machine and are to be used under dynamic loading. The conventional cutti…
We have monitored the physical processes linked to electrochemical processes in situ occurring at MmNi 3.6 Mn 0.4 Al 0.3 Co 0.7 alloy negative electrodes using an acoustic emission (AE) technique in terms of waveforms, power spectra, and time history of the AE signals. Hydrogen evolution was characterized by an AE wav…
Abstract We describe the experiments on a magnetically-induced drift of the easy axis on a soft surface of photoaligning material fluoro-polyvinyl-cinnamate. We found unexpected partial relaxation of the drift of the easy axis after switching the magnetic field off. This relaxation cannot be explained in a framework o…
Magnetic properties of palladium and palladium-platinum alloy (Pd-Pt) of different hydrogen content were measured in a hydrogen atmosphere at ambient temperature using a superconducting quantum interference device (SQUID) magnetometer. It was found that the magnetic susceptibility of Pd and Pd-Pt alloy decreased with…
The production of high concentrations of physiologically active pentameric and hexameric chitosan oligosaccharides was investigated. Chitosanase directly immobilized on an agar gel-coated multidisk impeller was used for the hydrolysis of chitosan. As hydrolysis proceeded, the concentration of chitosan was increased fr…
This paper reports the scaled-up self-assembly of single walled carbon nanotubes (SWCNTs) on the inside wall of a long silica-lined steel capillary tubing for applications such as chemical processing and separations. A unique one step self-assembly process has been developed and the effect of the substrate on the morp…
In this present work we report the influence of nozzle parameters viz., axial angle and diameter of the nozzle in reducing yarn hairiness during NozzleRing spinning. Three nozzles having varying nozzle axial angles of 40°, 45°, and 50° and a constant nozzle diameter of 2.2 mm, and another nozzle having axial angle of…
p-Hydroxybenzoate ester (paraben) preservatives are used in numerous orally administered products. The recognized route of metabolism for parabens is hydrolysis to p-hydroxybenzoic acid followed by conjugation and excretion. However, in the presence of alcohols, a presystemic transesterification pathway not previously…
A heteroepitaxial PbZr1−xTixO3 (PZT) thin film was fabricated by means of hydrothermal epitaxy at 210 °C below Curie temperature without undergoing the paraelectric to ferroelectric phase transition. From transmission electron microscope and piezoresponse force microscope observations, it was confirmed that the fabric…
Crystallization of tetrakis(thiourea)platinum(II) with squarate, croconate and rhodizonate dianions leads to the formation of different hydrogen bonded networks. The solvent used in the crystallization plays a central role in the nature of the hydrogen bonded network obtained, templating different structures from the…
Dense β-Si3N4 ceramics were prepared from the α-Si3N4 raw powder by sintering at 1900°C for 12 h at a nitrogen pressure of 1 MPa, using a mixture of Y2O3 and MgSiN2 as the sintering additives. The effect of embedding conditions on the thermal conductivity of β-Si3N4 ceramics was investigated by changing the number of…
We have developed two novel organic superconductors kappa H- and kappa L-(DMEDO-TSeF)2[Au(CN)4](THF) (DMEDO-TSeF = dimethyl(ethylenedioxy)tetraselenafulvalene) with the onset transition temperatures of 4.8 K for the kappa H-phase and 3.0 K for the kappa L-phase at ambient pressure, where DMEDO-TSeF is the second examp…
In previous study, the analysis of simultaneous reaction between the reduction reaction and the gasification reaction in a facing pair was performed. The definition of the coupling phenomenon was proposed. It was found that the starting temperature of gasification decreased from 900 to 600°C in the facing pair under C…
Reinforcing steel bars are an important material for construction. The strength level of rebar has been increased to as high as, for example, 345, 390 and 490 grade. In order to produce high-strength rebar, V microalloying technology has been successfully applied, while Nb application to reinforcing bars has been trie…
The relationships between mechanical properties and microstructure of Ti-29Nb-13Ta-4.6Zr in under aged, peak aged and over aged conditions at various aging temperatures were investigated. The maximum Vickers hardness values of Ti-29Nb-13Ta-4.6Zr aged at 573 K, 673 K and 723 K are obtained at aging times of around 2419…
Compósitos que utilizam fibras vegetais como reforço têm despertado crescente interesse por parte da comunidade científica e industrial. O bagaço e a palha de cana são materiais renováveis e quando usados como reforço em uma matriz termoplástica podem dar origem a compósitos com baixo custo, baixa densidade e interess…
Geothermal and solar heat are attractive and environmentally clean energy sources for future power systems where solid state generators may become more important. In this paper, a generator model for such a novel conversion system is presented. Benefits and constraints are shown using a thermoelectric generator for so…
In this paper we report the fabrication, properties and degradation studies of banana fibers–reinforced thermoplastic polymers. In order to impart hydrophobicity to the fibers and also to concomitantly increase interfacial bond strength, which is a critical factor for obtaining better mechanical properties of composit…
We previously reported that the electric permeability εr' of ferromagnetic nanocomposite oxide sputtered films with a Bi2O3-Fe2O3-PbTiO3 ternary system is subject to change with an external magnetic field H and that electric polarization induced by a small ac magnetic field, ΔPh(ω), is observed. To explain these exper…