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 coupling thermodynamic model to quantitatively describe elements segregation and inclusions precipitation during solidifcation process of clean RE heavy rail steel has been established,and according to the analysis on literature data,the model has higher precision.The effect of RE adding amount on law of precipitati…
The properties of surface passivating film of cold rolled stainless steel 409L(%:0.017C,11.50Cr, 0. 17Ti) passivated in 20%HNO3solution at 58 ℃ for 0～60 min have been analyzed by using glow discharge emission spectrometry (GDS),scanning electron microscope(SEM)and X-ray photoelectron spectroscopy(XPS),and the effect o…
In order to work out the problem of high air leakage rate of sintering machine at iron and steel works,a simulated magnetic seal device for sintering machine has been manufactured and the magnetic seal test to simulate slit status of sintering machine was carried out by using permanent magnetic alloy NdFeB as seal mag…
The improved process to decrease T[O] and inclusion content in steel was proposed by analysis on relation between T[O] and stable oxide inclusion content in liquid casing pipe steel 37Mn5 at 1 540 ~ 1 580 ℃ during 100 t LF refining and effect of slag basicity on active oxygen in steel in steel-slag equilibrium state.…
Main links for removal of inclusions in liquid steel are inclusion growth,floating and separating. The key progress on technique for removal of inclusion in steel is gas stirring-ladle argon blowing,gas shielding weir and dam in tundish, RH-NK-RERM method; electromagnetic cleaning-ladle electromagnetic stiring, tundis…
Influence of solution-treated temperature at 920~1100 ℃ on structure and corrosion resistance of medium plate of steel S32750(%:0.022C,25.35Cr,7.17Ni,4.05Mo,0.28N)in 6%FeCl3+0.05NHCl liquor has been studied. The results showed that with solution-treated at ≤ 1000 ℃,the σ-phase precipitated in steel,the ferrite content…
With considering the boundary conditions for secondary cooling thermal transmission, a mathematical model for thermal transmission to suit slab caster has been established. The measurement results by using infrared thermoscope to measure the surface temperature of 230 mm x 1650 mm slab of X65 pipeline steel conform to…
Telomers ionically tethered to nanometer-sized particles yield self-suspended, nanoparticle-laden liquids with unusual dynamical features. By subjecting these suspensions to controlled, modest shear strains, we find that their flow behaviors observed using experiments performed on time scales of tens of seconds can be…
Abstract This review summarizes previous work that was done to improve the production of bacterial cellulose nanofibres. Production of biocellulose nanofibres is a subject of interest owing to the wide range of unique properties that makes this product an attractive material for many applications. Bacterial cellulose…
This review discusses several computational methods used on different length and time scales for the simulation of material behavior. First, the importance of physical modeling and its relation to computer simulation on multiscales is discussed. Then, computational methods used on different scales are shortly reviewed…
Large-scale production of conical carbon nanostructures is possible through pyrolysis of hydrocarbons in a plasma torch process. The resulting carbon cones occur in five distinctly different forms, and disc-shaped particles are produced as well. The structure and properties of these carbon cones and discs have been re…
Graphene with a high carrier mobility of more than 10,000 cm2/Vs on SiO2has attracted much attention as a promising candidate of future high-speed transistor materials. The contact resistance (RC) between graphene and metal electrodes is crucially important for achieving potentially high performance of graphene from b…
We use ab initio density functional calculations to study the stability, elastic properties and electronic structure of sp2 carbon minimal surfaces with negative Gaussian curvature, called schwarzites. We focus on two systems with cubic unit cells containing 152 and 200 carbon atoms, which are metallic and very rigid.…
Free energy of crystal phases is commonly evaluated by thermodynamic integration (TDI) along a reversible path that involves an external potential. A persistent problem in this method is that a significant hysteresis is observed due to differences in the center of mass position of the crystal phase in the presence and…
We find that three nonstoichiometric cubic binary chromium chalcogenides, namely Cr 3 S 4 , Cr 3 Se 4 , and Cr 3 Te 4 , are stable half-metallic ferromagnets with wide half-metallic gaps on the basis of systematic state-of-the-art first-principles calculations. We optimize their structures, and then calculate their ma…
A new model is proposed for the strong ferromagnetism associated with partially localized orbitals in the Fe16N2 metallic system which draws substantially from models of heavy fermion metals. We demonstrated that an unusual correlation effect is brought up within the Fe-N octahedral cluster region and the effective on…
A wide range of experiments have established that certain chemical reactions at metal surfaces can be driven by multiple hot electron mediated excitations of adsorbates. A high transient density of hot electrons is obtained by means of femtosecond laser pulses and a characteristic feature of such experiments is the em…
The ground state and the transport properties of graphene subject to the potential of in-plane charged impurities are studied. The screening of the impurity potential is shown to be nonlinear, producing a fractal structure of electron and hole puddles. Statistical properties of this density distribution as well as the…
The aim of this project was to compare cerium oxide and silver particles of different sizes for their potential for uptake by aquatic species, human exposure via ingestion of contaminated food sources and to assess their resultant toxicity. The results demonstrate the potential for uptake of nano and larger particles…
Polymers that depolymerize by a cascade of intramolecular reactions in response to the removal of a stabilizing end-cap can allow for an unprecedented degree of control over the polymer degradation process. Described here is the development of polymers comprising N,N'-dimethylethylenediamine and 4-hydroxybenzyl alcoho…