Materials Literature
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In the present work Ti-HA (3, 10, 20, 50 vol%) nanocomposites were produced by the combination of mechanical alloying and powder metallurgical process. The experimental results show, that Ti-HA nanocomposites have better mechanical and corrosion properties in comparison with microcrystalline titanium. For example: Vic…
The grain boundary diffusion (GBD) of copper in aluminum is investigated in the range t = 300−400°C. Investigations were performed on a scanning electron microscope equipped with an attachment for electron probe X-ray microanalysis. The triple product sδD gb (where s is the segregation coefficient, δ is the width of t…
Fluorescence resonance energy transfer (FRET) between water-soluble conjugated polymer, poly-(9,9-bis(6'-N,N,N-trimethylammonium)-hexyl-fluorene phenylene) bromide, and ssDNA's labeled with four different types of dyes (Pacific-blue, Alexa-fluor 430, Fluorescein, and ROX) has been investigated. The effect of spectral…
Dark subsurface horizons, with properties similar to the sombric horizon characterized by the USA Soil Taxonomy, are frequent in Southern Brazil. The genesis of this horizon is controversial and poorly understood. This study aimed to describe the occurrence of sombric-like horizons in Ultisols in the South of Santa Ca…
Polyurethanes (PUs) have been synthesised successfully from renewable resources namely as rapeseed and sunflower oil using 4,4’-methylen-bis-(phenylisocyanate) (MDI) as the cross-linking agent. The mechanical property of these materials was observed in the Dynamic Mechanical Thermal Analysis (DMTA) test. A high tan de…
Abstract This paper deals with the deposition of thin films in capacitively coupled RF plasmas fed with bis(dimethylamino)dimethylsilane in mixture with argon. The effect of input power and of O 2 addition has been studied by means of a detailed FTIR investigation of the plasma phase and FTIR and XPS analyses of the d…
Amorphous carbon films with sp3 bonded carbon fractions over 70% are deposited by pulsed laser deposition. However, the optical bandgap obtained from optical transmittance and spectroscopic ellipsometry analysis shows the values to be below 1.0 eV. A wide range of measurements such as electron energy loss spectroscopy…
Abstract ZnO nanotube arrays were synthesized on zinc foil by a simple solvothermal approach. In this approach, zinc foil was used not only as a substrate but also as a zinc‐ion source for the direct growth of ZnO nanotube arrays. X‐ray diffraction (XRD) analysis and Scanning electron microscope (SEM) images, indicate…
Consolidation of titanium and titanium alloy powders using thermomechanical powder metallurgy (TPM) processes (powder compact forging, extrusion and rolling) is one way that can lead to cost-effective production of high value-added consolidated titanium and titanium alloy products such as near-net shaped components, t…
In the article, the results of examinations of changes in deformability of oxygen and sulphur inclusions in structural steel processed with calcium are discussed. The results obtained imply the positive influence of the calcium additives on the changes in geometry of oxygen and sulphur inclusions related to the modifi…
Some aspects of the interaction of (NH4)42[Mo 72 VI Mo 60 V O372(H3CCOO)30(H2O)72] · 30H3CCOONH4 · 250H2O (polyoxometalate Mo132) with a water-soluble nonionic polymer (poly(vinyl alcohol) or related poly(vinylpyrrolidone)) were studied in aqueous solutions and in films. A set of methods was used: spectrophotometry, E…
Compounds with the Ca3Ga2Ge4O14 structure containing Co2+, Mn2+ and Fe3+ ions in 3f position were synthesized and their magnetic properties were studied at low temperatures. Long range antiferromagnetic ordering in triangular net lattice has been observed with TN = 7–40 K.
The effect of Aluminum equivalent and Molybdenum equivalent on the strength and fracture toughness of titanium alloys was studied in this paper. The result shows that the tensile strength of the alloy increases with increasing of aluminum equivalent and molybdenum equivalent and the fracture toughness decreases gradua…
As the deregulation of the electric power industry moves forward, there is an increasing need for cost cutting and it is becoming exceedingly important to keep track of the residual life and identify the timing of replacement for power transmission equipment that has aged for several tens of years in the field. This p…
Measured lifetimes of hot phonons in group-III nitrides have been explained theoretically by considering three-phonon anharmonic interaction processes. The basic ingredients of the theory include full phonon dispersion relations obtained from the application of an adiabatic bond charge model and crystal anharmonic pot…
Thermooxidative degradation at and beyond processing temperatures of a polyoxymethylene copolymer has been progressively accelerated to carbonisation through oven-storage aging. The quantification of such degradation was carried out through FTIR spectrography and colour spectrophotometry methods. The state of thermo-o…
The effects of a combination of thermal oxidation at various temperatures and high-pressure water vapor annealing (HWA) on the luminescence and structural characteristics of nanocrystalline porous Si (PSi) have been investigated. The influences of initial PSi porosity and excitation power have also been studied. Stron…
Surprisingly little is reported on the pragmatic influence of project stakeholders on industrial designers' selection of product materials and manufacturing processes. This paper reports on a descriptive scoping study that revealed these influences as critical in making effective selection decisions. Using interview a…
Thin films of a new composite of an electroactive fullerene-based (C60-Pd) polymer and HiPCO single-wall carbon nanotubes, which were noncovalently modified by 1-pyrenebutiric acid (pyr-SWCNTs), were electrochemically prepared under multiscan cyclic voltammetry conditions. With respect to blank polymer, superior condu…
Powder inelastic neutron scattering (INS) has been used to determine the guest atom “rattling” energy in thermoelectric clathrates Ba8YxGe46−x (Yx=Ni6,Cu6,Zn8,Ga16) under different applied conditions. Chemical pressure was exerted by the atomic substitution, and a physical pressure of 9 kbars was applied using a clamp…