Materials Literature
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Controlling the electromagnetic response of general structures is one of the most ambitious purposes, containing numerous different objectives that can be utilized in implementing various optical components and electronic equipment. In this paper, the simplest configuration of a single isotropic layer is considered, w…
The law of influenced material of liner is researched by numerical simulation.Multiple explosively formed projectiles (MEFP) forming process is numerically simulated with different liner material,such as copper, aluminum, iron and so on.The law that the formation parameters of MEFP such as velocity, length-diameter ra…
In order to develop low-cost large eutectic ceramic, Al2O3/MgAl2O4/ZrO2 eutectic ceramic crystal was prepared with induction zone melting. The eutectic phases' composition and microstructure were investigated with X-ray diffraction and scanning electron microscopy, respectively, and mechanical properties were tested w…
The technique was developed with the purpose of definition of parameters for surface layer uniformity after mechanical hardening. It was found that one of the most effective methods of surface plastic deformation that provide precise adjustment of uniformity level of surface layer hardening is presented by static-puls…
The paper concerns a new group of titanium alloys with improved properties caused by presence of carbon. The effect of heat treatment processes like annealing, solution treatment and precipitation hardening on the microstructure of Ti-8Al-1Mo-1V alloy with carbon content not exceeding the limit of solubility of carbon…
Summary The influence of the side‐chains of main‐chain chiral poly(2‐oxazoline) s on their thermal properties was investigated using differential scanning calorimetry (DSC) and the nature of the obtained melting endotherms was further investigated by thermal annealing of the polymers. Poly(R‐2‐ethyl‐4‐ethyl‐2‐oxazolin…
We examine electromigration mass transport under pulsed-DC (PDC) and AC conditions by measuring the Cu drift velocity. We observed drift velocities that are constant as a function of duty ratio, confirm that there is no recovery of electromigration damage during current reversal, or off-cycles. Failure time distributi…
Metamaterials in particular a kind of metallic complementary electric split ring resonator (CeSRRs) bring new opportunities for traditional high-power vacuum electric devices. In this paper, we report the transmission characteristics in both simulation and experiment for a novel slow-wave structure (SWS) with the CeSR…
In this study, the eect of B2O3 addition on the sintering behavior of 0-5-10% ZrO2 doped barium titanate based microwave dielectric ceramics were investigated. For this purpose, the powder mixtures consisting of BaCO3, TiO2 and ZrO2 were prepared by ball milling technique in alcohol using ZrO2 balls at 200 cycle/min f…
Novel hollow Fe3O4 nanoparticles for drug delivery were synthesized via a one-step template-free approach. These nanoparticles were obtained by modifing the Fe3O4 nanoparticles with 3-aminopropyltrimethoxy silane, and then grafting alginate onto the surface of amine magnetic. The hollow structure of Fe3O4 spheres was…
The use of natural fibers as reinforcement material for natural fiber composite materials easily available, cheap, many types and variations. One of the natural fibers that can be used as reinforcement fiber composite is cantula agave plant leaves. In order to create a natural fiber composite material which has good m…
In the bridged vacuum gaps, the secondary electron emission avalanche (SEEA) occurring along the surface of solid insulator and the resultant surface charging play a crucial role in the progress of surface discharge. In order to sophisticate the insulation design of high voltage vacuum devices, analysis and control of…
Development of vacuum micro-nano-electronics is quite important for combining the advantages of vacuum tubes and solid-state devices but limited by the prevailing fabricating techniques which are expensive, time consuming and low-throughput. In this work, window-assisted nanosphere lithography (NSL) technique was prop…
In this paper, pure and indium-doped barium ferrite (BaInxFe12-xO19, x = 0, 1) thick films were fabricated by tape casting. X-ray diffraction and scanning electron microscopy results show that these BaM thick films have highly c-axis oriented crystallographic texture. Magnetic measurements indicated that pure samples…
The axisymmetric gravity-driven dynamics of a bubble rising toward a free surface is addressed for gas-liquid interfaces having unequal surface tensions. The liquid flow is governed by the Stokes equations which are here solved using a boundary element method in axisymmetric configuration. Within this framework, two d…
In this work, aqueous dispersions of PolyEtherKetoneKetone (PEKK) oligomers were obtained by an emulsion/dispersion solvent evaporation technique. The PEKK oligomers were synthesized by a Friedel–Crafts acylation with a number average degree of polymerization of 4. The synthesized PEKK oligomers had very good thermal…
A HfZrSiTa alloy of low melting point was designed by phase diagram calculation and smelted. The C f /HfC composite was then prepared by reactive melt infiltration at relative low temperature. The open porosity of specimen was 8.45%. By SEM, XRD and EDS, it was found that the melt infiltration microstructure mainly co…
The isothermal oxidation behaviours of Al2TiO5/TiO2/ZrO2 composite coating on titanium alloy (TC4) deposited by micro-arc oxidation technique were studied at different temperature points of 1073, 1173 and 1273 K in dry air. The surface morphology and phase composition of all coated samples were investigated before and…
Multilayer protective materials and coatings attract attention last years because the possibility appears to obtain unique properties of materials due to combination of properties and sizes of layers. In his paper analytical solution is constructed for the problem on multilayer foil tension. It is assumed that stress…
This work focuses on the effect of deposition temperature and post deposition annealing (PDA) in different gas ambient on the electrical properties of R.F. sputter deposited ferroelectric Barium Strontium Titanate (Ba0.5Sr0.5TiO3) thin film capacitors. Approximately 2000Å of Barium Strontium Titanate (BST) thin film w…