Materials Literature
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Abstract Considerable progress has been made in recent years in the search for synthetic methods leading to functionalized porphyrins, especially for modification of either the β‐ or meso positions. For the latter, total synthesis based on condensation methods or partial synthesis through functionalization of preforme…
We introduce a novel and versatile technique to fabricate monodisperse stimuli-responsive colloidosomes using stimuli-responsive microgel particles as building blocks, aqueous droplets as templates, and microfluidic devices to control the assembly. Our colloidosomes exhibit approximately 80% decrease in volume when ac…
A simple quasistatic model applicable to a wide class of wire media is developed that explains strong nonlocality in the dielectric response of wire media in the very long wavelength limit in clear physical terms of effective inductance and capacitance per unit length of a wire. The model is checked against known solu…
Blistering and deuterium retention in re-crystallized tungsten exposed to low-energy, high flux pure and helium-seeded D plasmas to a fluence of 10 27 D m −2 have been examined with scanning electron microscopy, thermal desorption spectroscopy, and the D( 3 He,p) 4 He nuclear reaction at 3 He energies varied from 0.69…
Mesoporous silica nanoparticles with remarkable stability and dispersibility have been successfully synthesized by direct organosilylation of silica−surfactant composite nanoparticles in a liquid phase. The nanoparticles can be uniformly embedded in a silica matrix to form nanocomposite coatings, which exhibit excelle…
Abstract Silver‐nanoparticle‐doped poly(9‐vinylcarbazole) (PVK) nanocomposites were prepared via the reduction of Ag + ions and the self‐assembly of PVK on AgNO 3 aqueous solution surfaces. The formed composite nanostructures depended strongly on the experimental temperature. Thick round disks of PVK surrounded by dis…
Deformation resistance of 320 mm x 280 mm cast bloom of spring steel 55CrSi (%: 0. 54C, 1. 37Si, 0. 70Cr) at 950 ~ 1 150 T was studied by Gleeble-1500 thermal simulator. Based on analyzing the effect of strain rate (1 - 10 s-1), deformation extent (0. 2 ~0. 5) and temperature on deformation resistance of the steel, th…
The structure of a 34t tundish has been studied and optimized by 1： 3 water model and orthogonal test with orthogonal table Ll6 (45). Results showed that the main primary and second sequence of tundish structure was height of weir, distance between dam and long nozzle, distance between weir and dam, and depth of dam；…
Loss of [Als] and [Si] and change of inclusions in low alloy steel (electrode-0.030%[Als],0.29% [Si],20×10-6T[O]) remelted by a 15 kg electroslag remelting (ESR)furnace with CaF2-Al2O3-CaO-SiO2slag system in argon atmosphere with argon flow rate 25 L/min and in air atmosphere have been studied. Results showed that rem…
Effect of 0. 10Cu-0.07As-0.05Sn on segregation in solidification, grain boundary segregation in heat treatment and ductility of low alloying steel (%:0. 15C,0.36Si,1.40Mn,0.003S,0.019P) at elevated temperature have been studied by Gleeble- 1500 hot simulator, scanning electron microscope and Auger electron spectroscop…
Rules of spread for 304 austenite stainless steel ①5. 5 mm coil non-tension rolling by a Φ160 mm two-high mill at ambient with 33. 1% ~68. 0% reduction has been studied. Results showed that the change of spread was influenced by metal flow uniformity during rolling: as reduction Δh/h0 was less than 58. 9%, with increa…
Numerical simulation of liquid flow field by using fluid dynamics analysis software Fluent has been carried out that the electromagnetic force exerts on submerged entry nozzle for round billet casting to make the liquid flow out of model nozzle in spiral condition and stir the liquid steel in mold. Results show that t…
According to actual 15 t tundish for casting 中120 mm pipe billet by horizontal continuous caster, the 1:1.5 water model system has been established to examine the flow field in local tundish and study the effect of flow control device on behavior of liquid flow in tundish. Results showed that the dead zone ratio in tu…
Math model of heat transfer during solidification of Φ400 mm concasting round bloom of steel 34Mn5V has been established and surface temperature values at controlling location of each secondary zone calculated by the model showed no difference to that measured at production ground. It is obtained with calculation by m…
Crystallization characteristics of two mold fluxes (%:2.54～3.0Al203 、7.34~8.35Na20 、8.83～8.87F、 0.79~3.00Li2O)during temperature decreasing and solidifying process for≤1.3 m/min normal speed casting (mold powder TCaO/SiO2=1. 19)and≥1.5m/min high speed casting (mold powder TCaO/SiO2=1.40) of 0.07～0. 10C hypoperitectic…
Elevated temperature ductility and deformed fracture mechanism of 370 mm×490 mm cast bloom of non- quenched and tempered free cutting steel 38MnVS(%:0.42C,1.29Mn,0.09V,0.067S)have been studied by Gleeble 1500D thermal simulator. Results showed that the Zero Strength Temperature(ZST)and Zero Ductility Temperature (ZDT)…
Structure and mechanical properties of0. 15C- 1.5Mn- 1.5Al-0.3Si TRIP steel heated at 820 ℃ for 2 min then quenching in 450 ℃ salt bath for 5~300 s,air cooling have been studied. Results showed that with increasing iso- thermal-time in Bainite transformation field at 450 ℃,the yield strength and elongation of steel in…
Test steel 15MnVNq (% : 0. 15C, 1. 71Mn, 0. 11V, 0.019 0 N) and steel 15MnVq (%: 0. 15C,1.72Mn, 0. 11V, 0.003 3N) were melted by 100 kg vacuum-induction furnace with respective adding V-N and V-Fe alloy, and rolled to 14 mm plate. Examination results showed that Added 0.019 0% N in steel 15MnVq obviously promoted V (C…
Production process to get super-low phosphorus content in high grade pipeline steel has been calculated by thermodynamics to study the conditions for LD dephosphorization and controlling resulfurization and the conditions for LF desulfurization and controlling rephosphorization. As 100 t LD end [O] is 0. 055%, the con…
With round- large oval- box- flat box pass system to replace original round- flat- octagon- flat box pass system,and optimized reduction schedule to roll φ210 mm carbon and alloy steel bars from 350 mm×470 mm bloom by 800 blooming mill at Special Steel Works, Bensteel, the qualified rate of rolled steel products was u…