Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A theory of a mushy region emergence for binary alloys is developed based on the classical Stefan thermodiffusion problem. At the instant a concentration (constitutional) supercooling arises near a planar front of solidification, and, as a consequence, solid phase elements in the form of dendrites, grains, etc. grow a…
The study of the electronic structure of the passive films formed on high purity Fe-Cr, Fe-Cr-Ni and Fe-Cr-Ni-Mo stainless steels was carried out by photoelectrochemical measurements. Bandgap energy and quantum efficiency are associated with the changes promoted by the alloying elements in the bilayer structure of the…
A new method for the optimisation of sintering processes makes use of the possibilities of an advanced thermokinetic software package. The method is based on dilatometer measurements at different heating rates. Subsequently, these measurements are analysed with a thermokinetic software package. The result of this anal…
Abstract
Ester Cross-Linking of Polycarboxylic Acid Scale Inhibitors as a Possible Means to Increase Inhibitor Squeeze Lifetime Øystein Bache; Øystein Bache RF-Rogaland Research Search for other works by this author on: This Site Google Scholar Svante Nilsson Svante Nilsson RF-Rogaland Research Search for other works by this a…
The folded chain structures in cellulose molecule were investigated through molecular dynamics simulation technique. The chain molecules based on the flexible ring structure model of glucose residues were applied for the simulation. The conformational transitions of the ring structures were not detected during the sim…
Carbon steel has been utilized well as a structural material in a commercial adsorption refrigerating system with help of corrosion inhibitors : most typically, hydroxide and molybdate ions. In this study, X-ray photoeletron spectroscopy (XPS) analysis has been carried out on the films formed on carbon steel exposed i…
The simultaneous codeposition of PTFE and α-alumina with nickel from Watts type bath was investigated. Nonionic surfactant (Triton-X 100) was added to the bath as a dispersing agent of PTFE. In the absence of α-alumina, PTFE particles did not codeposit, while they could codeposit in the presence of α-alumina pariticle…
Crack resistance of aluminium alloys used in Russian riveted and integrally stiffened airplane structures is outlined. Experimental data on crack growth duration and residual strength of riveted and integral structures are compared.
The aim of the study was to investigate the synthesis of a copolymer bearing cyclic carbonate and its miscibility with styrene/acrylonitrile copolymer (SAN) or poly(vinyl chloride) (PVC). (2-Oxo-1,3-dioxolan-4-yl)methyl vinyl ether (OVE) as a monomer was synthesized from glycidyl vinyl ether and CO2 using quaternary a…
The origin of the gel formation during the conversion of poly(amic acid)s to polyisoimides, and methods for its prevention are described. The gelation behaviour was studied as a function of the cyclodehydration temperature, the concentration and end-groups of 4,4′-oxydianiline/4,4′-oxydiphthalic anhydride poly(amic ac…
This paper deals with the performance of alumina bearing sol, prepared through sol-gel route, when used as a bonding agent in low cement refractory castable composition. The physical properties of the samples prepared by different processing technique (tapping and vibration) are compared. The results indicate that the…
The model of nonlinear equations for solidification in the presence of a quasiequilibrium mushy gone is solved analytically. Concentration, temperature fields, bulk fraction of the solid phase in the mushy zone, and the mushy region width are found theoretically.
Magnetic domain structures of Nd2Fe14B based permanent magnets were studied by using electron holography and Lorentz microscopy. In a sintered Nd2Fe14B permanent magnet, a domain wall width of a 180° magnetic domain was evaluated to be 5.1 nm by Lorentz microscopy, while the magnetization distribution in the 90° magne…
With an extended Su–Schrieffer–Heeger Hamiltonian including Hubbard energy and intersite Coulomb repulsion, we study the effects of two kinds of boundary conditions on the spin configuration and lattice distortion in organic ferromagnetic polymers with interchain coupling. It is shown that if the length L of the latti…
Thermal degradation of two series of polyacrylates containing long fluorocarbon chains [abbr.: PFnA {HCF2(CF2)n−1 CH2OC(O), n = 4, 6, 8, 10} and abbr.: PFFnEA {CF3(CF2)n−1 CH2CH2OC(O), n = 6, 8, 10}] was investigated by TG /FTIR. Thermal degradation behavior of polymers changed depending on the type of tie g…
New copoly(aryl ether ketone)s have been synthesized by polycondensation of 2,2′,3,3′,6,6′-hexaphenyl-4,4′-diphenol, 2,2′-p-hydroxyphenyl-iso-propane, and 4,4′-difluorobenzophenone. The technology of 13C-NMR was used to determine contents of the two bisphenols in the copolymers. Chain structure was characterized by il…
The Fourier transform infrared (FfIR) and Raman spectra of gypsum (CaS04'2H20) and barite (BaS04) from various localities in Macedonia were studied. Contrary to the group-theoretical predictions, it was found that the band originating from the V2 sulfate mode (expected at around 450 cm-I) does not appear in the infra…
Niosomes or non-ionic surfactants vesicles are microscopic lamellar structures formed on the admixture of a non-ionic surfactant, cholesterol and phosphate with subsequent hydration in aqueous media. The delivery of drugs by “vesicular drug delivery system” such as niosomes provides several important advantages over c…
The abilities of four chelators to separate bast fibers of non-retted oilseed flax from each other and the core and cuticle have been investigated at different pH level. EDTAand DTPA separate fiber ...