Materials Literature
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Abstract A new process for boric acid production is developed. In this process the crystalline boric acid particles are directly produced in a one‐stage crystallizer through the reaction of colemanite particles with propionic acid. Each porous colemanite particle is comprised of spherical solid grains. It is found tha…
In order to investigate the influence of shot peening on the surface durability of sintered powder metal gears, the plasma case-hardened sintered powder metal rollers and gears shotpeened with different condition were fatigue-tested under a sliding-rolling contact condition. The hardness, the compressive residual stre…
For nematic lyotropic liquid crystals it has been experimentally observed that in nontreated glass cells the director in the surface layer can be reoriented by a magnetic field in any direction parallel to the surface, and the final state is stable. In this paper we will focus on the equilibrium configuration of the d…
The effect of the type of alcoholic solvent on the formation of SiO2 gels in the sol-gel process has been studied by observing the gelation time in a tightly closed system. A large difference in the rate of gelation was found among fifteen kinds of alcohols used as the solvent. The gelation time decreased with increas…
Plasma technologies for the destruction of ozone-depleting substances are reviewed. Particular attention is paid to the PLASCON process, based on an argon plasma produced by a dc plasma torch, which is used to destroy halons and chlorofluorocarbons in Australia and the UK. Three different approaches to modelling the d…
A new hybrid ceramic-polymer coating was designed to provide a chemical barrier to protect metallic substrates against corrosion. This material is completely hydrophobic, protecting the coated surface from chemical attack from its environment. A good adhesion between the organic and inorganic phases was achieved, prod…
The magnetic properties and crystal structures of nanocrystalline Sm-Fe-Co-Nb-B compounds were studied using rapid quenching technique and powder x-ray diffraction analysis. As a result, it was found that the TCu7-type structure was able to be obtained even if the B content of the ribbons was around 8at%, and high mag…
We investigate the ferroelectric phase transition and the domain formation in a periodic multilayer structure consisting of alternate ferroelectric (FE) and paraelectric (PE) layers of nanometric thickness. The principle result of this study is that the polarization domains formed in the different FE layers interact w…
Abstract Die Reaktion des chloroverbrückten, orthopalladierten Bis(2, 2, 5, 5‐tetramethyl‐4‐phenyl‐2, 5‐dihydroimidazolin‐1‐oxyl) mit dem Oxalsäurediamid‐verbrückten Bis(tetramethylpiperidin‐oxyl) ( 1 ) liefert einen Tetranitroxiddipalladium‐Komplex 3 mit einer Oxamid‐Brücke in der trans ‐Konformation, der röntgenogra…
Fiber-blending irregularities and fiber distribution in blended-yarn cross-sections are particularly important in determining the mechanical, functional, and aesthetic properties of textile products. In the work reported in this paper, wool/acrylic blended worsted yams with a linear density of 32 tex (31 Nm), twist le…
The wide application of pressure sensitive adhesives (PSAs) in thin film transistor liquid crystal display (TFT-LCD) devices is based on their advantages that PSAs provide sufficient bond strength and also are cleanly removable upon debonding. These two essential requirements are not obtainable without a proper unders…
The effects of resin blend or solvents on a deposited film in an electropaint system were studied. We confirmed that the film formation follows the ion-permeable film formation (IPFF) model. The film resistivity fell off after the addition of a resin with a low glass transition temperature ( T g ) to a resin with a hi…
The plasma plume generated during laser ablation of a carbon target (graphite 99.99%), is characterized by means of Optical Emission Spectroscopy (OES) and the Langmuir probe technique. Both techniques allow the determination of the mean kinetic energy of ions present in the plasma. Besides that, information about the…
The adsorption behavior of benzoic acid onto a water-compatible hypercrosslinked polymeric adsorbent NJ-8 was compared with that onto macroporous Amberlite XAD-4. This paper focuses on the static equilibrium adsorption behaviors,the adsorption thermodynamics and the column dynamic adsorption profiles. Five isotherm mo…
4 pages, 4 figures; one modified figure, added reference
Vibrational spectroscopy enables subtle details of the molecular structure of minyulite KAl2(OH,F)(PO4)2⋅4(H2O). Single crystals of a pure phase from a Brazilian pegmatite were used. Minyulite belongs to the orthorhombic crystal system. This indicates that it has three axes of unequal length, yet all are perpendicular…
The numerical model of columnar to equiaxed transition (CET) was constructed with consideration of molten steel flow. Solid shell growth was analyzed by using macroscopic heat flow model in addition to heat transfer due to the fluid flow at the solidification front, which was calculated by fluid flow model. At the sam…
This review is focussed on the crosslink distributions between rubber phases, which arise when blends of rubbers are vulcanized, how these distributions may be evaluated and controlled, and how they impact upon the properties of the blends. The blends are divided into three categories - rubbers differing primarily in…
This study has certified that investigating the characteristics of mic romorphology of Neogene red clay is also one of the effective methods to analyze the paleoclimate, and correlate and subdivide the strata. According to the ch aracteristics of micromorphology of Neogene red clay developed at Xiaqiang Villa ge, Xuny…
Measurement of the X-ray diffraction patterns of 304L stainless steel after subjecting it to an electrochemically induced surface annealing process in concentrated nitrite solutions shows that the austenite lattice contracts during processing relative to the untreated alloy. The surface annealing procedure, which invo…