Materials Literature
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We demonstrate an ion implantation method for large-scale synthesis of high quality graphene films with controllable thickness. Thermally annealing polycrystalline nickel substrates that have been ion implanted with carbon atoms results in the surface growth of graphene films whose average thickness is controlled by i…
AIM: Understanding the interactions between nanomaterials and disease processes is crucial for designing effective therapeutic approaches. This article explores the unusual neuroinflammation targeting of dendrimers (with no targeting ligands) in the brain, with significant consequences for nanoscale materials in medic…
The ability to generate a change of the lattice parameter in a near-surface layer of a controllable thickness by ion implantation of strontium titanate is reported here using low-energy He + ions. The induced strain follows a distribution within a typical near-surface layer of 200 nm as obtained from structural analys…
Employing Molecular Dynamics simulations of a chemically realistic model of 1,4-polybutadiene between graphite walls we show that the mass exchange between layers close to the walls is a slow process already in the melt state. For the glass transition of confined polymers this process competes with the slowing down du…
Ferromagnetic insulator Pr0.8Ca0.2Mn1-yCoyO3 (0 <= y <= 0.7) thin films were epitaxially grown on (LaAlO3)0.3-(SrAl0.5Ta0.5O3)0.7 (100) substrates by pulsed laser deposition. To probe the ferromagnetic insulator state of hole-doped manganites, the Co content dependences of the structural, magnetic, and transport prope…
In the first part [D. B. Migas et al., J. Appl. Phys. 108, 093713 (2010)] electronic and optical properties of different phases of WO3 have been considered. In this part we present results of our ab initio calculations which clearly show that all Magnéli phases of tungsten oxides WOx (namely, W32O84, W3O8, W18O49, W17…
The key technology for production of lead free-cutting steel is to control the yield of lead, the homogeneity of lead in liquid, the lead vapour pollution on environment, the surface quality of billet and smooth casting. Both controlling lead and increasing castability of steel SUM24HSL (% : ≤0.11C, 1.0-1.5Mn, ≤0.05Si…
Based on analyzing the effect of calcium treatment on inclusion modification and combined commercial pilot production of pipeline steel X80 (%： ≤0.08C, ≤1.85Mn, ≤0.060Als) in steelworks, the limits of calcium content required for modifying Al2O3to low-melting-point calcium aluminate and the limits of sulphur content t…
With decreasing rolling speed, increasing reduction in rough rolling passes especially in last passes, the quality of macrostructure of continuous rolling Φ30 ~45 mm round products of bearing steel GCr15 rolled from 150 mm x 150 mm casting billet increases obviously i. e. occurred ratio of residual shrinkage hole decr…
Based on practical production data of steel ZG06Cr13Ni4Mo refining by 40 t VOD at Heavy-Duty Machinery Co, Ansteel, and according to conservation of energy and mass and principle of thermodynamics, a process model for steelmaking stainless steel with VOD has been established by using analysis method of system engineer…
According to similarity theory, the bubble behavior in single snorkel refining furnace has simulated by u- sing a scale 1 ：4 water model for an 80 t single snorkel refining furnace at steel works, and the effect of gas blowing rate (2~10 L/min) and plug diameter (15~30 mm) on bubble behavior and mixing time is analyze…
The bearing steel GCr15 is produced by pretreated hot metal (0.050% P, ≤0.005% S)-150 t BOF catch carbon blowing LF (RH) - 350 mm x 470 mm bloom casting-800 mm bar-rod continuous rolling mill process at Benxi Steel. Operation practice results show that the higher oxidative state of liquid at condition of high lance he…
The representative chemical composition system and properties of steel rails for freight transport and passenger traffic are summarized and analyzed. The key technologies of rails for railway manufacturing flow sheet including melting, continuous casting and hot rolling, and the now progress of the technologies at hom…
The growth behavior of austenite grain of secondary hardening ultra-high strength steel AF1410 (% : 0.165C, 14.10Co, 9.83Ni, 1.92Cr, 1.05Mo) heating at 800 ~ 1200 °C for 5 - 180 min has been studied. Results show that with increasing heating temperature and holding time the average austenite grain size of steel AF1410…
The N80-1 oil casing pipe steel (36Mn2V, % : 0.34-0.38C, 0.25-0.40Si, 1.45-1.70Mn, ≤ 0.020P, ≤ 0.015S, 0.01 -0.04Al, 0.11-0.16V, (Sn + Sb + As + Pb + Bi) ≤ 0.035, [O] ≤ 35 x 10-6[N] ≤ 80 x 10-6[H] ≤ 2.5 x 10-6is melted by 80t top and bottom combined blown converter-LF-VD-Φ210 ~ 270 mm round bloom casting process. With…
A computer simulation analysis on heat treatment process (electromagnetic induction heating for 55 s, air cooling for 8 s, wind cooling for 42 s then air cooling to ambient) of heavy rail end of steel U71Mn (% : 0.65 -0.76C, 0.15 ~0.35Si, 1.10~1.40Mn, ≤0.030V, ≤0.025Ti) has been carried out by using finite element met…
The effect of austenizing time (30 - 100 s) at 850 °C on structure and mechanical properties of 1 mm sheet of DF78O cold rolled dual phase steel (% ： 0.15C, 1.80Mn, 0.08Ti, 0.04Al) has been studied by using continuous annealing simulation machine. Results show that with conditions of austenizing at 850 X., cooling to…
The effect of location and number of gas permeable brick and bottom argon supply rate on mixing time of liquid in a 90 t ladle furnace at steelworks has been tested and studied by using water model with 1：2.5 geometric resemble scale. Results show that the optimum ladle furnace gas permeable brick is located under dum…
The 0.5-2.5 mm cold rolled sheet of test magnetic pure iron is rolled by 350 mm four high reversing finishing mill from 3.5-4.5 mm hot continuous rolled plate of magnetic pure iron (% ： 0.005C, 0.50 Al). Results show that the optimum annealing temperature for the magnetic pure iron sheet to get smaller coercive force…
The solubility of nitrogen in solid stainless steel 304, 304L, 301S and 301L (γ-phase) and in melts of austenite stainless steel has been calculated by using thermodynamic analysis method to get computational model for solubility of nitrogen in the steels, and the experimental research on nitriding behavior in four au…