Materials Literature
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The main objective of this paper is to investigate the applicability of a finite element method (FEM) to textile problems, in particular to the heat transfer behavior of plain knitted cotton fabrics. For this purpose, a heat transfer measurement unit is initially set up for the experimental study. Then, a plain weft k…
Fifteen years since the first application of the UHF method for partial discharge in gas insulated switchgear, this has become widely used and the preferred method for PD diagnostics in GIS. Same technique is currently starting to be applied for onsite PD testing of Power Transformers. Significant advantages of this U…
The catalytic oxidation of CO was performed over Au/TiO(2) under UV irradiation in the presence of H(2) in different reaction systems. It was found that the introduction of H(2) enhanced the CO thermocatalytic oxidation in a CO pre-introduced system (CO/O(2)vs. CO/H(2)/O(2)), but suppressed that in an O(2) pre-introdu…
During solidification, solute-induced convective instabilities at the solid -liquid interface can result in the formation of defects such as freckles and misoriented grains in superalloy single crystals. These defects can be particularly detrimental to the properties of single crystal nickel-base superalloys. Unfortun…
BACKGROUND: Previous experiences of whole body MR angiography are predominantly available in linear 0.5 M gadolinium-containing contrast agents. The aim of this study was to compare image quality on a four-point scale (range 1-4) and diagnostic accuracy of a 1.0 M macrocyclic contrast agent (gadobutrol, n = 80 patient…
It is not possible to measure the handle of fabrics, which can be defined as the total senses felt when touching a fabric. Objectively with only one instrument and therefore in many researches concerned with fabric sensorial comfort evaluations were done subjectively without using any instruments. However, various ins…
The four dominant types of high-voltage transmission cable -paper insulated oil filled (OF), cross-linked polyethylene insulated, oil filled, gas insulated, and high-temperature superconducting - offer a variety of advantages, disadvantages, and potential for future development. So does an emerging technology, high-te…
Al/MgAl2O4 in situ metal matrix composites have been synthesized using value-added silica sources (microsilica and rice husk ash) containing ∼97% SiO2 in Al-5 wt.% Mg alloy. The thermodynamics and kinetics of MgAl2O4 formation are discussed in detail. The MgO and MgAl2O4 phases were found to dominate in microsilica (M…
A truly in situ and simple method is developed for nanoparticle incorporation within the mesochannels of SBA-15 involving dispersion of metal precursors in surfactant-modified polymer micelles. The diffusion of the precursor within the micellar structure is aided by interaction with the cationic head group of the surf…
An effective approach for preparing electrically conductive SiAlON-TiN composites have been developed. Granules of a designed composition of α-β SiAlON were obtained by spray drying and coated with varying amounts of TiO2 powder (0-10 vol%) homogenously by mechanical mixing. Fully dense composites were obtained by spa…
It is well known that three types of white-colored microstructural changes occure in rolling contact fatigue (RCF). Those are called WB (White band), Butterfly and WEA (White etching area) respectively. As the conditions of bearing use have become severer, recently these phenomena are observed more frequently. However…
Since the proposal to synthesise materials by laser assisted pyrolysis in the 1970s, and its practical realisation in 1982, a number of researchers have used this method in obtaining nano-powders from liquid droplets. This study revisits this technique by introducing a new aspect in that it considers obtaining thin fi…
The effect of external fields (dc electric field, light illumination) on the memory effect of the incommensurate phase in the ferroelectric-semiconductor TlGaSe2 is studied using the measured dielectric constant. The results obtained are discussed. It is shown for the first time that the effect of external fields on t…
Chromium metal‐induced nanocrystallization of amorphous silicon (a‐Si) thin films is reported. The nanocrystalline nature of these films is confirmed from X‐ray diffraction and Raman spectroscopy. Significantly, the deconvolution of Raman spectra reveals that the thin films were crystallized in a mixed phase of cubic…
オーステナイト系ステンレス鋼の母材および溶接金属の水素脆化特性に及ぼす化学組成の影響を45 MPaの高圧水素ガス環境における低ひずみ速度引張試験 (Slow Strain Rate Testing, SSRT) により調査し，ひずみ誘起マルテンサイト (α′) 相生成およびδフェライト相有無の観点から機構を考察した．固溶化熱処理を施した母材および凝固ままの溶接金属ともに，脆化特性はα′相の生成量に依存した．Md30が高い化学組成ほど，また試験温度が低いほどα′相の生成量が増し，脆化感受性は増大した．また，溶接金属部に生成したδフェライト相は20％以下であったが，脆化に顕著な影響を与えなかった．α′相は亀裂先端部で連続生成することか…
A new heat radiation substrate for high power modules has been proposed by utilizing Al2O3 thick films formed by the aerosol deposition method (ADM) on Al substrates. Dense Al2O3 thick films (AD-Al2O3) could be obtained by the ADM at room temperature. A heat-cycle endurance test between -80°C and 180°C revealed that t…
The dielectric behavior of lithium tantalate (LT) single crystals has been investigated in the vicinity of the ferroelectric phase transition for nonstoichiometric and near-stoichiometric compositions. Fitting of the experimental data to a modified Curie-Weiss equation indicates the occurrence of a mildly relaxor-ferr…
To improve the mechanical properties and to reduce the water sorption amount of denture base resins, the polymerization characteristics of three novel fluoro-substituted monomers (MAF-TBN, MAF-MAE, MAF-TBN) and three styrene-type monomers (PTBS, PEES, PACS) were studied, as well as the copolymerization of these monome…
Ultrafine-grained steels with grain size of about 1 μm offer the prospect of high strength coupled with high toughness among conventional steel compositions and are attracting the attention of researchers worldwide. Application of these ultrafine grained steels to the fabrication of potential engineering structures de…
The requirement for diverse applications such as digital video, interactive media etc. demands high storage densities, rapid data transfer rates, random access to data and removability of the storage media. The complete technology involves suitable recording medium and the processes for recording, post treatment and r…