Materials Literature
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Sorption of phosphate onto gibbsite (gamma-Al(OH)3) and kaolinite has been studied by both macroscopic and 31P solid-state NMR measurements. Together these measurements indicate that phosphate is sorbed by a combination of surface complexation and surface precipitation with the relative amounts of these phases dependi…
Periphytic diatom communities were sampled from glass substrates immersed along a gradient of organic and metallic pollution. We investigated the influence of nutrients and a combination of nutrients and metals on biofilms and diatom communities settling on the glass over three weeks. Biofilm was characterized through…
Catalytic properties of Au nanoparticles supported on a one-dimensional γ-Al 2 O 3 (1-D) nanofiber and commercial γ-Al 2 O 3 have been investigated during CO oxidation at low temperatures (298∼373 K). The kinetic data showed that the activity of Au catalysts could be remarkably improved by using γ-Al 2 O 3 nanofibers…
The phenomenon of accumulated charges on solid insulator surfaces is one of the critical parameters to consider at the insulation design stage, for AC electric power equipment as well as for DC equipment, so it is important to investigate the characteristics and predominant factors underlying various charging mechanis…
A new method based on variable transformation is proposed for the estimation of the constant strain rate tensile test by using a previously introduced concept of viscoelastic response given to the real relaxation stimulus. The time range of the “good” fitting is 2.5 to 3 times larger than the best results achieved usi…
The effect of basalt fibers, produced by the Junkers technology and used as reinforcement in polymer composites, was modeled on the properties of composites, adapting the statistical fiber mat model of Poisson type. The random distribution was approximated by so-called effective spheres that act as defect sites in com…
Polyketone was prepared by the copolymerization of carbon monoxide (CO) and styrene (ST) catalyzed by o-phenylenediamine resin-supported palladium acetate. Effects of each catalytic system component such as 2,2’-bipyridine, 1,4-quinone and p-toluene-sulphonate on the copolymerization were investigated. The resin-suppo…
Although high density polyethylene (HDPE) is one of the most widely used industrial polymers, its application compared to its potential has been limited because of its low dimensional stability particularly at high temperature. Dilatometry test is considered as a method for examining thermal dimensional stability (TDS…
We adopt a kinetic theory of polariton non-equilibrium Bose-Einstein condensation, to describe the formation of off-diagonal long-range order. The theory accounts properly for the dominant role of quantum fluctuations in the condensate. In realistic situations with optical excitation at high energy, it predicts a sign…
Abstract Amorphous polymers exhibit a primary (glass, or α‐) relaxation process and a low‐temperature relaxation process associated with polymer backbone motion usually referred to as the β‐relaxation process. The latter process can be observed below the glass transition temperature of the polymer and usually merges w…
Underwater implosion experiments were conducted with thin-wall glass spheres to determine the influence that structural failure has on the pressure pulse. Four experiments were conducted with glass spheres having an outside diameter of 7.62 cm, thickness of 0.762 mm, and an estimated buckling pressure of 7.57 MPa. The…
We present a combined experimental and numerical study of the equilibrium cluster formation in globular-protein solutions under no-added salt conditions. We show that a cluster phase emerges as a result of a competition between a long-range screened Coulomb repulsion and a short-range attraction. A simple effective po…
The main goal of this study is to obtain a morphological confirmation of the contribution of coalescence to the fibril formation mechanism in microfibril reinforced composites (MFC) and in this way to explain the large differences in sizes of the starting spheres and the resulting long microfibrils, at rather modest d…
The corrosion behavior of mild steel in the presence of acetic acid (CH3COOH) and carbon dioxide (CO2) has been investigated using electrochemical techniques and weight-loss measurements. Electrochemical measurements have shown that the presence of acetic acid affects predominantly the cathodic reaction. The acetic ac…
Mathematical model for Nb( C ,N) precipitation in ferrite of micro niobium HSLA steel and calculated NbC nucleation radius, nucleation rate and growth rate in ferrite with 900 ~ 1200 ℃. austenization are presented. The test results by some authors indicated the precipitation of niobium carbo-nitride needed higher disl…
LF (ladle furnace)refining is a key metallurgical process for steelmaking cold rolled low carbon steel in BOF-LF-CSP flow sheet. The electric characteristics of a 120 t LF with 20 MW transformer and the power supply curves have been studied and optimized by established optimizing model to decrease refining time and im…
The numerical simulation of jet flow field of inner and out of Laval tube has been carried out by commercial software CFX4. 4, and the fluid flow distribution of axis symmetry turbulence jet out of tube with different stagnation pressure was analyzed to verify the k-ε turbulence model. Results showed that at environme…
A charge partition model for stainless steel smelting by K-OBM-S process at Taiyuan Steel has been established by a linear programming method including 13 decision variables in the model, minimum cost charge partition selected to be objective function and a set of linear equality and inequality about variable as restr…
The controlled rolling and cooling test for a V-Nb-Ti microalloying X100 pipeline steel(0.057C,1.84Mn, 0.25Mo) has been caried out by φ350 mm 4 roll mill in laboratory.Results showed that with initial rolling temperature 1100 ℃,finishing temperature 800~900 ℃ and end cooling temperature 100～400 ℃ the structure of X100…
The nitrogen removal from 0. 02% C molten steel in argon direct current (DC) glow plasma has been tested by a 25 kg vacuum induction furnace and the effect of argon glow plasma on kinetics of nitrogen removal from molten steel was studied. Results showed that the nitrogen removal speed and efficiency from molten steel…