Materials Literature
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The effect of calcium cyanamide (CaCN2) addition on the sintering of AlN ceramics was investigated. Pressureless sintering was carried out with 0 to 3.0mass% CaCN2 addition, and densified sintered specimens (relative density>97.0%) were obtained using 1.0 to 2.0mass% CaCN2 addition depending on sintering temperature a…
Al2O3-coated graphite powder was prepared using ethyl acetoacetate aluminium diisopropoxide through the sol-gel method. The fluidity of the Al2O3-coated graphite powder slurry was studied. The apparent viscosity of a 2mass% Al2O3-coated graphite powder slurry was lower than that of a graphite powder slurry in the rang…
The safety and health problems of an experimental magnetic fusion facility for a static magnetic field and variable electric and magnetic fields were considered. Static magnetic field strength was measured with a gauss meter in a large helical device (LHD) hall and outside of the 2-m concrete wall used as the radiatio…
The chemical state of the tungsten (W) in the rust of low alloy steel was analyzed by EPMA and XPS, and the electrochemical behavior of rust was investigated by alternating current (AC) impedance method after wet/dry cyclic corrosion test with chlorides. The 1.0mass%W-bearing steel showed higher corrosion resistance t…
A parameter identification of the Jiles-Atherton hysteresis model for a soft magnetic composite (SMC) is realized directly by a nonlinear optimization technique coupled with a 2D field calculation. The identification method fits experimental instantaneous voltage and current measurements realized on a transformer with…
Das Schwingfestigkeitsverhalten von induktiv randschichtgehärteten Bauteilen und bauteilähnlichen Proben erklärt sich schlüssig aus der Gegenüberstellung von Lastspannungs- und Schwingfestigkeitsprofil (Woodvine-Analyse). Maßgebendes Kriterium ist die kritische Verfestigungstiefe. Festigkeitsbetrachtungen im Bereich d…
A new series of rigid polyesters and semiflexible polyethers were synthesized from 4,4″-dihydroxy-5′-phenyl or anthracenyl-m-terphenyl. The polymers were characterized by viscometry, Fourier transform infrared, NMR, X-ray, differential scanning calorimetry, thermomechanical analysis, thermogravimetric analysis, ultrav…
Blends of 60/40 phr of MDPE/EPDM have been subjected to radiation vulcanization by gamma rays of 60 Co in the presence of either HAF carbon black or white Hisil. The effect of the level of loading with Hisil has been followed up in the range of 0-100 phr. Mechanical properties, namely, elongation at break, tensile mod…
The effects of ionizing radiation on ethylene-propylene copolymer were evaluated over the range of total γ doses up to 500 kGy. The influence of the irradiation dose was investigated by oxygen uptake and thermal analysis. Four testing temperatures (170, 180, 190, and 200°C) and two heating rates between 2.9 and 5.9 K/…
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…