Materials Literature
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The corrosion morphologies of aged magnesium alloy AZ80 were investigated by immersion corrosion tests, scanning electron microscopy (SEM), electrochemical measurement. The T5 heat treatment was carried out in a vacuum furnace, holding for 16 h at 177◦C, and then cooling in air. The results showed intergranular corros…
S. Ahmadi1)†, H. Arabi, A. Shokuhfar and A. Rezaei 1) Institute of Advanced Technologies for Metallic Materials, Tarbiat Modares University, Tehran, Iran 2) Center of Excellence of Advanced Materials and Processing (CEAMP), Department of Metallurgy and Materials Science and Engineering, Iran University of Science & Te…
Medipolymorphol, a new sterol isolated from the whole plant of Medicago polymorpha Roxb was used as corrosion inhibitor for 316 stainless steel in 5% HCl at room temperature. Electrochemical techniques have been found to be reliable in evaluating corrosion characteristics of the system. Several techniques have been us…
The luminescence of unusual divalent bismuth (Bi2+) in BaB8O13 is reported. The emission band with maximum peak at 592 nm corresponds to the P-2(3/2)-->P-2(1/2) transition of Bi2+ in the matrix and the excitation spectrum with two bands peaked at 470 and 580 nm respectively corresponds to two split crystal-field level…
Microstructure and interfacial reactions of AI2O3 joints brazed with AI2O3-particulate-contained composite Ag-Cu-Tifiller material were researched by scanning electron microscopy (SEM), electron probe microscopy analysis (EPMA),energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The interfacial reaction…
In this paper, we reported a first-principles investigation on the structural and electronic properties of O adsorption on the gamma-TiAl(111) surface, to illustrate the oxidation process. It has been found that: (1) rather than stopping with one full monolayer of coverage, oxygen adsorption continues till two monolay…
The structure and properties of Cu-Cr-Zr alloy were studied after rapidly solidified aging and solid solution aging. At the early stage of aging (500 ‐ C for 15 min), the hardness and the conductivity of the alloy rapidly solidified are 143 HV and 72% IACS, respectively. Under the same aging condition, the hardness an…
In this article, we report the results of our detailed investigations of the growth kinetics of zero-dimensional nanocrystals as well as one-dimensional nanorods by the combined use of small angel X-ray scattering (SAXS), transmission electron microscopy (TEM) along with other physical techniques. The study includes g…
The electrical resistivity of Cu/Ta multilayers deposited by radio-frequency magnetron sputtering on a polyimide substrate was investigated as a function of monolayer thickness It is found that the resistivity of the multilayer increases with decreasing monolayer thickness from 500 nm to 10 nm Two significant effects…
By combination of magnetron sputtering deposition and vacuum annealing, an aluminum diffusion coating was prepared on the substrate of AZ91D alloy to improve its corrosion resistance. The microstructure and composition of the diffusion coating was investigated by scanning electron microscopy and X-ray diffraction. The…
The differences of tension-tension fatigue and tensile creep characters of 2D-C/SiCand 3D-C/SiC composites have been scrutinized to meet the engineering needs. Experiments of tension-tension fatigue and tensile creep are carried out under vacuum high temperature condition. All of the high temperature fatigue curves ar…
The modified embedded atom method proposed by authors has been applied to calculating the enthalpies of formation of random alloys and the ordered intermetallic compounds for noble metal binary systems bearing Rh or Ir. The present results are in good agreement with those of Miedema theory, available experiments and t…
Electrodeposited zinc and zinc-based alloys are widely used as the protective coatings of metals,and the nature of their atmospheric deterioration is their electrochemical corrosion under thin electrolyte film.This paper reviews the influence mechanism of several important aggressive particle on the corrosion process…
Ti-containing carbon films were deposited by using magnetron sputtering deposition. The composition and microstructure of the carbon films were characterized in detail by combining the techniques of Rutherford backscattering spectrometry (RBS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and transm…
Ion implantation is a powerful method for fabricating nanoparticles in dielectric. For the actual application of nanoparticle composites, a careful control of nanoparticles has to be achieved. In this letter, the size, distribution and morphology of Ag nanoparticles are controlled by controlling the ion current densit…
Calmodulin plays a role in several life processes, its flexibility allows binding of a number of different ligands from small molecules to amphiphilic peptide helices and proteins. Through the diversity of its functions, it is quite difficult to find new drugs, which bind to calmodulin as a target. We present availabl…
Fluoropolymer and different kinds of silica particles were used for controlling surface chemistry and morphology, respectively. A superhydrophobic surface originated from strawberry-like or quincunx-shaped composite silica particles was obtained. The dual size particles are obtained by utilizing the graft of different…
The erosion behavior of Kapton when exposed to atomic oxygen (AO) environment in the ground-based simulation facility was studied. The chemical and physical changes of sample surfaces after exposed to AO fluxes were investigated by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and atomic f…
High-temperature heat-treated graphitic nanoribbons are characterized in the bulk and individually by Raman spectroscopy. In the bulk, seven excitation laser energies are used and line scans with Elaser=2.33eV on isolated pristine and heat-treated nanoribbons are carried out (see image). The results from these measure…
Nanocrystalline nickel zinc ferrite powders (NixZn1−xFe2O4, A for x=0, B for x=0.2, C for x=0.5, D for x= 0.8 and E for x= 1) were synthesized by polyacrylamide gel method. X-ray diffraction (XRD), transmission electron microscopy (TEM) and wave-guide were used to characterize the composition. The XRD results show tha…