Materials Literature
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Iron chalcogenides, binary FeSe, FeTe and ternary FeTexSe1−x, FeTexS1−x and FeTe:Ox, are the simplest compounds amongst the recently discovered iron-based superconductors. Thin films of iron chalcogenides present many attractive features that are covered in this review, such as: (i) easy fabrication and epitaxial grow…
High-energy-resolution fluorescence-detected X-ray absorption spectroscopy (HERFD-XAS) has been applied to study the chemical state of ∼1.2 nm size-selected Pt nanoparticles (NPs) in an electrochemical environment under potential control. Spectral features due to chemisorbed hydrogen, chemisorbed O/OH, and platinum ox…
Magnetic properties of nanometer-thick Co films intercalated at the graphene/Ir(111) interface are investigated using spin-polarized low-energy electron microscopy and Auger electron spectroscopy. We show that the graphene top layer promotes perpendicular magnetic anisotropy in the Co film underneath, even for relativ…
The evolution of elastic-plastic shock waves with the propagation distance has been studied in 99.99% purity aluminum and in annealed 6061 aluminum alloy. The free surface velocity histories of shock-loaded samples, 0.1–2.0 mm thick and with initial temperature from 296 to 932 K, have been recorded using velocity inte…
We present a simple analytical approach to study anharmonic effects in single-layer, bilayer, and multilayer graphene. The coupling between in-plane and out-of-plane modes leads to negative Gr\"uneisen coefficients and negative thermal expansion. The value of the thermal expansion coefficient depends on the coupling t…
In the modern micro-electronics, transition metal oxides due to their colossal values of dielectric permittivity possess huge potential for the development of capacitive energy storage devices. In the present work, the dielectric permittivity and the effects of temperature and frequency on the electrical transport pro…
Treatment of malignant gliomas remains a challenge irrespective of the recent improvements. Chemotherapeutic agents for malignant gliomas have been particularly inefficient for the existence of blood-tumor barrier (BTB), which hampers the accumulation and uptake in tumor. Moreover, even though blood-brain barrier (BBB…
Following the previous achievement of highly crystalline α-Ga 2 O 3 thin films on c -plane sapphire, the growth of corundum-structured α-(Al x Ga 1- x ) 2 O 3 was examined aiming at the future application of α-(Al x Ga 1- x ) 2 O 3 /Ga 2 O 3 heterostructures to power devices and other functional devices. The results s…
Group IIIA elements (B, Ga, In, and Tl) have been doped into PbSe for enhancement of thermoelectric properties. The electrical conductivity, Seebeck coefficient, and thermal conductivity were systematically studied. Room-temperature Hall measurements showed an effective increase in the electron concentration upon both…
The mechanism of effect of isothermal temperature on banded structure is delved by calculation of ferrite incubation period and nucleation rate, and the evolution of banded structure in sample of gear steel SAE8822H (/% : 0. 22C, 0. 20Si, 0. 98Mn, 0. 60Cr, 0. 46Ni, 0. 36Mo) heated in tube furnace at 930 ℃ for 10 min a…
The rating of inclusions in steel 15CrMoG for boiler tube (/%: 0. 12 〜0. 18C, 0. 17 - 0. 35Si, 0. 40 〜0. 70Mn, ≤0.015P, ≤O. 010S, 0. 80 〜1. 10Cr, 0. 40 〜0. 55M。≤0. 08 V, ≤0. 020Alt) is that C series ≤1.0 and Ds series ≤1.0. The production flow sheet of the steel is hot metal pretreatment-120 t LD-LF-RH-280 mm x 380 mm…
According to the phenomena of 8 ~ 12 mm plate tensile fracture layering of low alloy high strength welded steel HG70C (/%: 0. 069 ~D. 077C, 0. 07 〜0. HSi, 1. 79 〜L83Mn, 0.011 〜0.012P, 0. 004 ~ 0. 005S, 0. 121 〜 0. 123Ti, 0. 046 - 0. 047 Nb), the morphology of fracture and area near layering are observed and analyzed b…
The types and formation cause of inclusions in casting steel 38CrMoAl (/%: 0. 35 ~ 0. 42C, 0. 20 ~0. 45Si, 0. 30 - 0. 60Mn, 1. 35 〜1.65Cr, 0. 15 ~ 0. 25Mo, 0. 70 - 1. 10A1) are studied. By optimizing deoxidation technique including increasing 60 t EAF end [C] ≥ 0. 010% and maintaining high basicity slag (R≥2. 5), inje…
The major research and development field of patented technologies for high strength oil well tubing steels including the key technique of heat resistance (≤650 °C), corrosion resistance (H2S, CO2Cl-medium) and anti-collapse (yield strength 380 ~ 1 241 MPa) is summarized and the characteristics of research and developm…
Based on the process of 50 t EAF-LF-VD for gear steel 28MnCr5 (/% : 0. 28C, 0. 09Si, 0. 70Mn, 0. 015P, 0. 027S, 0. 95Cr) , the effect of proportion of each ingredient in slag on melting point of CaO-SiO2-Al2O3-MgO refining slag series has been studied by using thermodynamic calculation software FactSage, to get optimu…
Effect of ageing treatment at 480 ~ 620 °C for 4 h on structure and mechanical properties of steel 15-5PH (/% ：0. 065C, 0. 46Si, 0. 58Mn, 0. 022P、0. 004S, 14. 77Cr, 5. 19Ni, 2. 91 Cu, 0. 22Nb) solid-solution-treated at 1 000 T and 1 040°C for 30 min water cooling has been studied. Results show that with ageing at 480…
The relative studies on evaporation of fluorides in quad- and pent-ingredient slag series during electroslag remelting process are concluded and summarized. The thermodynamic analysis on volatile reaction of fluorides has been carried out by activity calculation model of slag components to get order of evaporation of…
A double loop-electrochemical proteinomimetic reactivation (DL-EPR) method is used to evaluate the intergranular corrosion (IGC) susceptibility of hot rolled and annealed 430 ferrite stainless steel (0. 038% C, 16. 83% Cr). A suitable test parameter- in test solution 0. 05 mol/L H2SO4+0. 001 mol/L KSCN + 0. 10 mol/L N…
The effects of size, type, amount and morphology of inclusions in steel on magnetic properties of non-orien- ted silicon steel is reviewed. The main kinds of inclusions in non-oriented silicon steel are smaller size MnS, AIN, and CuxS etc. The inclusions of dimension 0. 1 ~ 1. 0μm have larger influence on magnetic pro…
The steel GCrl5 is produced by hot metal pretreatment-120 t top and bottom combined blown converter-LF- VD-0180 mm CC process. The statistical data for effect of converter end [C] on oxygen activity in liquid, effect of LF refining slag basicity on T[O] and effect of aluminium content in steel at end of LF refining pe…