Materials Literature
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Au-Pt nanostructures on highly oriented pyrolytic graphite (HOPG) were prepared by irradiating bimetallic target under ultrahigh vacuum with pulsed radiation of Nd:YAG laser. The deposited nanostructures were characterized by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The measured spectr…
Time Modulated Chemical Vapour Deposition (TMCVD) process regime has been used to deposit diamond coatings onto commercially available tungsten carbide tool inserts. The TMCVD process was developed in our laboratories so that diamond films with fine grains could be deposited. It accomplishes this by promoting secondar…
The N 1s core binding energies of spin-coated poly(vinylpyridine) (PVPy), quaternized PVPy, and UV-irradiated PVPy were determined using X-ray photoelectron spectroscopy, and the depth profiles were determined using Ar + beam etching. In typical N 1s spectra, cationic nitrogen atoms appeared at a binding energy 2–3 eV…
Wood is the one of three main construction materials. Comparing to other two, Iron and Concrete, recycling rate of wood is low and its material flow is not clear yet. One reason of such situation is that there are so many recycling methods of wood. In this research, we tried to make real situation clear concerning abo…
The most popular and important biodegradable polymers are aliphatic polyesters, such as polylactic acid (PLA), polyglycolic acid (PGA), polycaprolactone (PCL), polyhydoxyalkanoates (PHA’s) and polyethylene oxide (PEO). However, each of these has some shortcomings which restrict its applications. Blending techniques ar…
Dielectric Relaxation Spectroscopy (10−1 Hz to 106 Hz) was used in order to get relevant information regarding the different modes of motion, from supercooled liquid down to the glassy state, present in the glass‐forming Ibuprofen. This pharmaceutical drug easily avoids crystallization on cooling from the melt, formin…
The surface magnetic domain patterns of a La2/3Sr1/3MnO3 film grown on a LSAT (001) substrate, where LSAT stands for (LaAlO3)0.3(Sr2AlTaO6)0.7, were observed by magnetic force microscopy (MFM) as a function of the temperature in the 300?360 K range at its remanent state. Magnetic stripe domains showing an up and down…
North Carolina State University Theses Chemical Engineering.
Since the introduction of XeF2 in‐situ cleaning, its use in production implanters has been mainly focused on cleaning ion sources by flowing the cleaning vapor through the source arc chamber. This has been called “Dynamic” in‐situ cleaning. “Static” in‐situ cleaning is a different method under development at ATMI whic…
The long term development of fusion materials in the European Union for the construction and operation of future fusion power reactors focuses on structural materials such as Reduced Activation Ferritic Martensitic (RAFM) steels, of which the EU reference material is EUROFER, Oxide Dispersion Strengthened (ODS) RAFM a…
A new materials testing apparatus using an external loading system in 230 MPa hydrogen at room temperature was developed. The apparatus consisted of a pressure vessel with a loading device for the slow strain rate technique (SSRT). The elimination of the axial load due to high pressure acting on the pull rod was achie…
The deleterious effect of creep damage upon fatigue endurance in elevated temperature low cycle fatigue is well established and has become known as the ‘creep – fatigue interaction’. This has been identified as a narrow region where a transgranular crack becomes intergranular as creep damage develops. In other cases t…
In letzter Zeit wird gehäuft über Risiken von Nahrungsinhaltsstoffen und pflanzlichen Arzneimitteln in Verbindung mit deren Gehalt an Cumarinen berichtet. Ziel dieses Reviews ist es deshalb, zunächst eine Übersicht zur Biochemie, Pharmakologie und Toxikologie dieser Stoffgruppe zu geben. Abhängig vom Substitutionsmust…
The predicting equations for the declines of transmembrane pressure and permeate flux in hollow-fiber ultrafilters were derived from the complete momentum balance with the consideration of the rate of momentum transfer by convection, instead of simply applying Hagen-Poiseuille theory without the consideration of the e…
In order to discuss the effect of fiber length distribution on yarn properties,researchers prefer fiber length density function,for some mathematical methods can be adopted conveniently and the density function is the best way to describe the entire length distribution.Based on Premier test data,this approach uses ker…
Guide-mode resonances of double-layer gratings are analyzed with the Fourier modal method and the relationship between spectral characteristics of resonant gratings such as peak diffraction efficiency, linewidth and side-band reflectance and depth, period and fill ratio of grating are illustrated in detail. It is show…
BaO-Al_2O_3-SiO_2(BAS) glass-ceramics with stoichiometric and off-stoichiometric celsian composition were fabricated,doped with B_2O_3 for melting and sintering.Crystallization and phase transformation characters of two groups of BAS glass-ceramics with and without ZrO_2 were investi- gated by differential scanning ca…
In this paper,the four-way catalytic technology for controlling diesel automobile exhaust gases emissions including four kinds of main pollutants such as hydrocarbons,carbon monoxide,particulate matter(PM)and nitrogen oxides(NOx),is reviewed in terms of the four-way catalytic converters and four-way catalysts,and the…
Thermal decomposition of hexanitrohexaazaisowurtzitane (HNIW) was studied by mass spectroscopy (MS) with low impacting electron energy. Non-isothermal kinetics treating method for ion curves in mass spectroscopy was established. The mechanism of HNIW thermal decomposition was analyzed according to the Arrhenius curves…
This report critically examines measurement techniques for determining the shape, size and size distribution of nanosized filler particles in polymeric systems. Particular emphasis has been placed on the ability of these techniques in providing reliable, quantitative data for assessing the level of dispersion in compo…