Showing papers in "Materials Letters in 2008"

TL;DR: In this article, a vivid account of natural products which are used as corrosion inhibitors for various metal and alloys in aggressive media is given, where the authors point out the importance of cheap, safe inhibitors of corrosion.

TL;DR: In this article, a simple biological procedure using coriander extract as the reducing agent was used to synthesize gold nanoparticles in the size range from 6.75 to 57.91 µm.

TL;DR: In this article, a bioactive hydroxyapatite (HA) coating was electrodeposited on AZ91D magnesium alloy surface to improve its biodegradation performance.

TL;DR: A facile bottom-up synthetic route using green tea extract as reducing and stabilizing agent produced gold nanoparticles and silver nanostructures in aqueous solution at ambient conditions as discussed by the authors.

TL;DR: In this article, the authors reported the synthesis of nanoparticles of silver by reduction of aqueous Ag+ ions with the culture supernatant of Bacillus licheniformis.

TL;DR: In this article, a new equation for the dependence of Tg on composition in blends as well as in copolymers is presented. But the new equation is not applicable to polymers.

TL;DR: Magnetic Fe 3 O 4 -activated carbon nanocomposite was synthesized for the first time from rice husk based activated carbon as mentioned in this paper, which still held a relatively large pore diameter of 3.1

TL;DR: In this article, a simple and fast microwave-hydrothermal method at 130°C for 20min was used to synthesize crystalline ceria (CeO2) nanoparticles, which were characterized by thermogravimetric analysis (TG-DTA), X-ray powder diffraction (XRD), field-emission scanning electron microscopy/STEM mode (FEG/STEM), Fourier transformed-IR and RAMAN spectroscopies.

TL;DR: In this paper, a hybrid organo-inorganic hybrid composite material based on conducting polymer, poly(o-toluidine) (POT)−silver (Ag) nanoparticles has been successfully synthesized by performing chemical oxidative polymerization of o-toline in the presence of negatively charged Ag nanocolloids.

TL;DR: In this article, the effect of different lubricant environments when 6061 aluminium alloy is machined with diamond-coated carbide tools was analyzed with respect to the cutting forces, surface roughness of the machined workpiece and tool wear.

TL;DR: In this article, a cost effective and reliable casting technique was introduced to overcome the wetting problem between B 4 C and liquid aluminium metal as well as the formation of undesirable phases at the interface using K 2 TiF 6 flux.

TL;DR: In this paper, carbon micro-spheres with a regular and perfect shape, high yields and narrow size distribution were successfully synthesized by a hydrothermal route in a stainless steel autoclave.

TL;DR: In this paper, a tool for welding was rotated at speeds ranging from 800 to 1600rpm under a constant traverse speed of 300mm/min, and defect free welds were successfully obtained and the surface morphology of the welds became smoother as the tool rotation speed was increased.

TL;DR: A chelating monomer, glycidyl methacrylate-iminodiacetic acid (GMA-IDA), was grafted onto cotton fibers to form cotton fiber-graft-GMA−IDA (CFGI) as discussed by the authors.

TL;DR: In this article, a new solvent system for the electrospinning of CA nanofibers, a mixed solvent of acetic acid/water was developed, which can be used for CA deacetylation.

TL;DR: In this paper, the corrosion properties of a Mg alloy with Ca in Hank's solution were investigated by the hydrogen evolution test, and the results demonstrated that the corrosion resistance and hydrogen evolution rate are controlled by the Mg2Ca phase distribution in the mg-Ca alloy system.

TL;DR: The corrosion inhibitive effect of the extract of black pepper on mild steel (MS) was evaluated by conventional weight loss studies (303 −323 K), electrochemical studies viz., Tafel polarization, ac impedance and scanning electron microscope (SEM) studies as mentioned in this paper.

TL;DR: In this paper, the microstructure and property relationship in aluminum-HSLA steel and aluminum-dual phase steel bimetals fabricated by explosive welding technique was investigated, and it was shown that the plastic deformation of dual-phase steel was higher than HSLA steel near interfaces of bometals.

TL;DR: In this article, the chemical and physical processes of magnesium in simulated body fluid (SBF) were investigated, and the corrosion rate of magnesium was measured after 3, 5, 7, 14 and 21 days of immersion, respectively.

TL;DR: In this article, the degradation of the magnesium alloy AZ31 in Hank's solution was investigated and the degradation rate was shown to be significantly reduced by grain refinement produced by mechanical processing and hot rolling does lead to a desirable retardation of degradation, while subsequent equal channel angular pressing does not result in any further reduction of degradation rate.

TL;DR: In this article, a sol gel combustion method using urea as fuel was used to obtain ceramic BiFeO 3 powders, which were thermal treated at different temperatures (300-840 ÂC) and times (1-64 ÂH) to investigate the best synthesis conditions of the material.

TL;DR: In this paper, the mechanical properties of stinging nettle fibres are measured and compared to flax and other lignocellulosic fibres, showing that they have a linear behaviour.

TL;DR: In this article, a novel photocatalyst WO 3 /TiO 2 nanocomposite was prepared through a hydrothermal method by using cetyltrimethylammonium bromide (CTAB) as surfactant.

TL;DR: In this article, an optimized etching time of 2.5min is found to be essential, before Teflon coating, to obtain a highest water contact angle of 164 −± 3° with a lowest contact angle hysteresis of 2 5 −± 1.5°, with the water drops simply rolling off these surfaces with even the slightest inclination of the sample.

TL;DR: In this paper, a PANI nanofiber product synthesized by using both potassium biiodate, KH(IO 3 ) 2, and sodium hypochlorite oxidant shows high electrical conductivity of greater than 100 S cm − 1.

TL;DR: In this article, the effect of niobium element on the as-cast microstructure of the hypereutectic high chromium cast irons containing 4.0 and 20.0% Cr was studied.

TL;DR: In this paper, electrospun polyacrylonitrile (PAN)-based nanofiber webs containing titania were prepared and tested to make an easy operation of photodegradation effective.

TL;DR: A series of N, S-substituted Titanium (IV) bis (2,4-pentadionate) precursor were synthesized by the sol-gel method as mentioned in this paper.

TL;DR: In this paper, a uniform single-crystal boehmite leaf-like nanosheets with high anisotropy (with a lateral size of (4.5 − 0.5μm) and a thickness of 60 − 90 nm) and flower-like superstructures consisting of singlecrystal petals were synthesized for the first time by a simple hydrothermal method.

TL;DR: In this article, the inhibition effect of five amino acids (AA) on the corrosion of copper in molar nitric solution was studied by using weight loss and electrochemical polarization measurements.