Materials Literature
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Guided bone regeneration (GBR) films with bioabsorbable characteristics have been employed for surgical procedures to prevent the growth of scar tissue in the bone graft site. GBR films provide an isolated space over regions with defective tissues and prevent the invasion of fibrous connective tissue into the defect s…
Previous studies on brittle fracture of composite insulator were concluded, and unanswered questions were analyzed. Almost all the previous studies focus on the source of corrosion medium (the acid) and the mechanical load in brittle fracture, but the stress concentration of stress corrosion fracture was neglected. Sa…
Abstract Mixed rare earth organophosphates have been investigated as potential corrosion inhibitors for AA2024‐T3 with the aim of replacing chromate‐based technologies. Cerium diphenyl phosphate (Ce(dpp) 3 ) and mischmetal diphenyl phosphate (Mm(dpp) 3 ) were added to epoxy coatings applied to AA2024‐T3 panels and the…
We study the binding of molecular oxygen to a (5, 0) single walled SiC nanotube, by means of density functional calculations. The center of a hexagon of silicon and carbon atoms in sites on SiCNT surfaces is the most stable adsorption site for O 2 molecule, with a binding energy of −38.22 eV and an average Si–O bindin…
Solute-rich beta titanium alloys such as Ti 38-644 (Beta- CTM) are known for an inhomogeneous precipitation of the strengthening alpha phase during aging. Consequently precipitate-free zones, referred to as “β flecks”, remain within the beta matrix when the material is solution treated above the transition temperature…
Novel ternary phases, (Pd(1-x)Zn(x))(18)(Zn(1-y)Al(y))(86-delta) (0<or=x<or=0.162, 0.056</=y<or=0.088, 0<or=delta<or=4), which adopt a superstructure of the gamma-brass type (called gamma'-brass), have been synthesized from the elements at 1120 K. Single-crystal X-ray structural analysis reveals a phase width (F43m, a…
We formulated a hydrodynamic model in order to describe the dynamical behavior of the π- electrons in single carbon nanotube shells of arbitrary chirality, either metallic or semiconducting, below terahertz frequencies, as long as only intraband transitions of the π- electrons are allowed. The hydrodynamic equations w…
SYNOPSIS: Despite the extensive use of topical coatings in cosmetics, their effect on the mechanical properties of human skin and the perception of skin tightness in the form of drying stresses is not well understood. We describe the application of a recently developed substrate curvature technique to characterize str…
The C 1s and F 1s X-ray absorption spectra of pristine and fluorinated single-walled carbon nanotubes with different fluorine contents and nanodiamond as a reference compound have been measured with the aim of characterizing single-walled carbon nanotubes and their products formed upon treatment of the nanotubes with…
New back-coating formulations containing new flame-retardant systems were prepared and applied on cotton textile samples. The flammability properties of cotton samples were improved sharply by applying the new back-coating formulations. The mechanical properties of cotton samples was totally destroyed when using the f…
Increasing the resistance of a material against fatigue crack growth by optimizing the microstructure is one of the major tasks of modern materials science. Thereby grain and phase boundaries are microstructural elements which can decelerate the propagation rate especially of short cracks. However, in different materi…
The synthesis of novel μ-nitrido diiron phthalocyanine with electron-withdrawing substituents is reported: μ-nitrido tetra-methylsulfonylphthalocyanine (13), μ-nitrido tetra-ethylsulfonylphthalocyanine (14), μ-nitrido tetra-adamantylsulfonylphthalocyanine (15), μ-nitrido tetra-cyclohexylsulfonylphthalocyanine (16). Th…
Mixed crystals of urea-thiourea in various proportions have been grown in solution by slow evaporation technique at room temperature (30°C). The solubility studies have been carried out at room temperature. In the presence of high concentrations of the thiourea in the medium, the solubility decreases appreciably. X-ra…
Abstract Acrylated epoxidized soybean oils (AESOs) with different level of saturation were obtained by the ring opening of different saturation epoxidized soybean oils using acrylic acid as the ring opener. AESO‐based thermosets have been synthesized by free radical polymerization of these AESOs and methyl methacrylat…
The effects of simulated acid rain (SAR) on corrosion behaviours of Q235 steel in acidic soil were studied using potentiodynamic polarisation, electrochemical impedance spectroscopy measurements, scanning electron microscopy and X-ray diffraction. The results indicated that the SAR heavily increased the corrosion rate…
This paper reports that SiO 2 is selected to fabricate broadband antireflection (AR) coatings on fused silica substrate by using glancing angle deposition and physical vapour deposition. Through accurate control of the graded index of the SiO 2 layer, transmittance of the graded broadband AR coating can achieve an ave…
A series of new β-diketones containing in their structure cyclohexane and benzene ring was obtained. The effect of the terminal substituents in the molecules of β-diketones on their liquid crystal and optical properties was studied. The absorption spectra of all β-diketones practically do not overlap with the emission…
This study examined the local structural and optical properties of ZnO nanoparticles (NPs) with mean diameters of 4.5 and 70 nm using extended X-ray absorption fine structure (EXAFS) measurements at the Zn K edge and photoluminescence (PL) measurements. EXAFS revealed that the average bond length of atomic pairs in th…
This article shows, on the base of recent results, that dislocation dynamics simulations provide a unique opportunity for establishing scale transitions in crystal plasticity. In the present study, transitions are performed between elementary dislocation mechanisms, collective and intermittent slip events at the mesos…
Abstract The origins of dolocrete and associated palygorskite in the Çanakkale region of Turkey have been little studied, but are of fundamental importance for a more complete understanding of the mineralogy of this region. The present study was undertaken in order to narrow this gap. Siliciclastic red mudstones withi…