Materials Literature
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There has been increasing interest in numerical simulations of fragmentation of expanding warheads in 3D. Accordingly there is a pressure on developers of leading commercial codes, such as LS-DYNA, AUTODYN and IMPETUS Afea, to implement the reliable fracture models and the efficient solution techniques. The applicabil…
Abstract Tetrahedral amorphous carbon coatings have the potential to significantly reduce friction and wear between sliding components. Here, we provide atomistic insights into the evolution of the sliding interface between naked and hydrogen-passivated ta-C sliding partners under dry and lubricated conditions. Using…
AIM: To analyze the neurotoxic potential of synthesized magnetite nanoparticles coated by dextran, hydroxyethyl starch, oxidized hydroxyethyl starch, and chitosan, and magnetic nanoparticles combined with ferritin as a native protein. METHODS: The size of nanoparticles was analyzed using photon correlation spectroscop…
A new fundamental route entitled ‘Route-R’ is introduced to refine the grains in the material through Equal Channel Angular Pressing (ECAP) process. In route R, specimen is inverted to the original position in each ECAP pass. In the present work, AZ61 alloy is processed using ECAP process for three different fundament…
This is a transient two-dimensional numerical study of double-diffusive salt fingers in a two-layer heat-salt system for a wide range of initial density stability ratio (Rρ0) and thermal Rayleigh numbers (RaT∼103 − 1011). Salt fingers have been studied for several decades now, but several perplexing features of this r…
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The inhibition effect of curcumin on the corrosion of mild steel in 1.0 M HCl solution was studied by weight loss, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) methods. The experimental results suggest that this compound is an efficient corrosion inhibitor and the inhibition eff…
Inhibition of steel corrosion by Ruta chalepensis L. oil has been investigated in aqueous 1 M hydrochloric acid solution using weight loss method, potentiodynamic polarization, electrochemical and impedance spectroscopy (EIS). The inhibition efficiency of R. chalepensis L. oil was calculated and compared. We note good…
The present paper is concerned with constitutive modeling of the compressive stress-strain behavior of selected polymers at strain rates from 10-3 to 103/s using a modified Ramberg-Osgood equation. High strain-rate compressive stress-strain curves up to strains of nearly 0.08 for four different commercially available…
Shell of oyster has a function of shelter from predator as well as growth potential. We investigated the physicochemical characteristics of oyster shells from three difference oyster farms. The shells from Wando waters characterized high stability of nanostructure, ticker nacreous layer, high thermal decomposition tem…
본 연구에서는 노말 메틸 피로리돈(N-methyl-2-pyrrolidone, NMP)을 대신하여 다이메틸설폭시화물(dimethyl sulfoxide, DMSO)을 용매로 사용하여 폴리염화비닐 (poly vinyl chloride, PVC)로 리튬망간산화물(lithium manganese oxide, LMO)를 고정화하여 PVC-LMO 비드를 제조하였다. XRD 분석을 통해 PVC-LMO 비드내에 LMO가 잘 고정화 된 것을 확인 하였다. 합성한 PVC-LMO 비드의 크기는 약 4 mm였다. PVC-LMO 비드에 의한 리튬이온 흡착 실험은 회분식으로 수행하였다. 랭뮤…
Nanocomposites were prepared from mixture of different concentrations of ferroelectric nanoparticles in an elastomeric matrix based on the vulcanized natural rubber. The morphological characterization of nanocomposites was carried out using Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and…
Structural changes and resistance to the stress-corrosion cracking of the nitrogen-bearing austenitic steels 04Kh20N6G11M2AFB and 09Kh20N6G11M2AFB (with 0.04 and 0.09 wt % C, respectively) after different treatments, including thermomechanical action, quenching from 1200°C, and aging at 700°C for 2 and 10 h, have been…
The article is devoted to the development of ultrasonic radiator in form of stair-step plate. The influence of radiator sizes on frequency and vibration amplitude is studied. On the base of the represented calculations it was determined the set of recommendations for designing of such radiators.
The temperature dependence of the optical absorption of core-shell nanoparticles is investigated in the framework of the quasi-static approximation at finite temperature with regarding to the Maxwell-Garnett model for random nanocomposite. The effect of temperature on the surface plasmon resonance and spectral propert…
In this work, we demonstrate a cascaded, multiplicative electromagnetic enhancement effect in surface‐enhanced Raman scattering (SERS) on periodically micropatterned films made of colloidal gold nanoparticles, prepared by a self‐assembly approach, without implying lithography procedures. The multiplicative enhancement…
In this paper, a mathematical modeling of a Thermoelectric Module (TEM) is presented. The modeling is based on several studies presented in literature with some correction of mistaken equations. The presented model is developed using different approach taking into consideration the modeling of the Maximum Power Point…
A new potential approximation known as modified Becke—Johnson based on density functional theory is applied to compute the electronic band profile and optical response of CdIn2O4, CdGa2O4 and CdAl2O4 compounds. The direct band gap with common LDA, GGA and EV-GGA is drastically underestimated compared with modified Bec…
Generally, insulating spacers of gas insulated switchgear (GIS) have outstanding durability and are not considered prone to insulation failure within a design life of about 30 years, provided the products conform and have passed the partial discharge (PD) test. However, to assume operation over 30 years, degradation c…
Glass sheets covered with aligned electrospun silk fibroin (Bombyx mori) were compared to tissue culture-treated Thermanox® coverslips, using an organotypic culture method. Different chick embryo organ behaviours were analysed in terms of circularity, cell growth and cell adhesion after being cultivated in contact wit…