Materials Literature
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Heat-assisted magnetic recording is one of the most promising approaches to achieve extremely high density magnetic recording. A laser is used to temporarily heat the recording media film to render its switching field to become lower than the magnetic field of the writing head. After writing, the film material is cool…
Abstract The catalytic and photocatalytic hydrothermal oxidation of chlorobenzene has been examined at reaction temperatures ranging from 25 to 400 °C and at a fixed pressure of 30 MPa, using Cu(II)-grafted tungsten trioxide (Cu/WO3) as the catalyst and hydrogen peroxide as the oxidizing reagent. The decomposition eff…
A microresonator-based interfacial fatigue testing technique was used to investigate the subcritical delamination of atomic-layer-deposited alumina coatings along the sidewalls of deep-reactive-ion-etched monocrystalline silicon thin films. This technique ensures loading conditions relevant to microelectromechanical s…
Fluoro substitution in thermotropic liquid crystals provides a general way of modifying the properties of a parent system. Transition temperatures, mesophase types and other physical properties can be affected by fluoro substitution, so that frequently the behaviors of the parent compound can be manipulated and improv…
Nowadays, one of the major issues of the PEMFC concerns the durability. Historically, carbon has been used as a catalyst support in PEMFC; nevertheless, under the environmental conditions of the cell, the carbon is oxidized, leaving the catalyst unsupported. In order to increase the stability and durability of the cat…
The cure monitoring of composite parts is an important key to optimize the industrial curing cycles. In this study, it is proposed to monitor the cure of a thermosetting resin by a Fresnel refractometer. The measurements are first compared to dielectric analyses and predictions of a thermo‐kinetic model that uses para…
We study the modifications on the ground and excited state properties of polycyclic aromatic hydrocarbons (PAHs), induced by the variation of concavity and π-connectivity. Inspired by experimentally feasible systems, we study three series of PAHs, from H-saturated graphene flakes to geodesic buckybowls, related to the…
Terbium‐activated YA l 3 ( BO 3 ) 4 ( YA l 3 ( BO 3 ) 4 :Tb 3+ ) phosphors were synthesized by both combustion method and solid‐state reaction. It was found that the pure‐phase YA l 3 ( BO 3 ) 4 phosphors synthesized by combustion method were obtained at 1000°C, which was 200°C lower than that by solid‐state reaction.…
The ordering transitions of a two-dimensional lattice liquid characterized by a single favored local structure (FLS) are studied using Monte Carlo simulations. All eight distinct geometries for the FLS are considered and we find a variety of ordering transitions: first order, continuous, and multistep transitions. Usi…
The self-assembly of an angular 2,5-bis-(pyridin-2-yl)-1,3,4-thia-diazole ligand (L) with silver nitrate (AgNO3) produced a new dinuclear silver(I) coordination complex, [Ag2(C12H8N4S)2(NO3)2]·4H2O, which crystallizes with two Ag atoms bridged by two L ligands. The Ag atom is surrounded by four N atoms of L and by one…
In order to investigate and predict effects of preparation parameters on wear mass loss of Ni-SiC composite coatings, Ni coatings and Ni-SiC composite coatings were prepared on steel substrates by electrodeposition process. The results showed that the contents of SiC particles increased with density of pulse current a…
Hollow balls are used in the production of various machines and devices. The technology for producing hollow balls by metal forming technologies poses numerous difficulties connected with the forming of a hollow billet. The billet, which is usually in a form of a rod, is a subject to such processes as forging, helical…
Two commercially available (EP, Z) and eight new elastomeric composites (M1-M4, G1-G4, of thickness ≈1 mm) containing mixtures of differing proportions of heavy metal additives (Bi, W, Gd and Sb) have been synthesised and examined as protective shields. The intensity of the X-ray fluorescence radiation generated in th…
In the present research, the synthesis and characterization of poly(arylene ether ketone) (PAEK)–cadmium sulfide (CdS) nanocomposites prepared using carboxylic-functionalized PAEK (PCA-PAEK) as the ligand in dimethylformamide solution from cadmium acetate and thiourea is reported. The resulting CdS/PCA-PAEK nanocompos…
The lifting of the fourfold degeneracy of the zeroth Landau level in graphene under high magnetic fields has been the subject of numerous experimental studies, and attributed to various mechanisms such as pure spin splitting, spin splitting combined with subsequent valley splitting, or the formation of a quantum Hall…
Ultrasound waves have been successfully applied for removing template from the mesoporous MCM-41 molecular sieve. The method uses a 28 KHz ultrasound irradiation in a methanol solvent for disrupting micellar aggregation of the surfactant molecules, cetyltrimethylammonium bromide, which have filled the pores of the as-…
This research mathematically derives the frequency equations of back electromotive force (BEMF), cogging torque and unbalanced magnetic force (UMF) of a brushless DC (BLDC) motor due to unevenly magnetized permanent magnet (PM). The proposed mathematical equations are experimentally validated by comparing with the mea…
Copolymers, consisting of isothianaphthene and phenylene derivatives with liquid crystal groups, were synthesized via Migita-Kosugi-Stille polycondensation reaction. IR absorption, UV-vis optical absorption, and PL spectroscopy measurements were carried out. Thermotropic liquid crystallinity of the polymers with bandg…
Abstract The crystal structure and magnetic properties of SmFe 9− x Co x ( x = 0, 1, 3, 5) alloys were studied by X‐ray powder diffraction (XRD) and magnetic measurements. The Th 2 Zn 17 ‐type structure of the as‐cast state is changed to TbCu 7 ‐type structure after quenching to a rotating molybdenum roll under certai…
Phase resonances in multilayer metal-dielectric compound gratings are numerically modeled and described. Additional grating layers allow for more complex types of phase resonances in which light travels in different, circuitous routes through the structure. It is shown that phase resonances produce highly enhanced fie…