Materials Literature
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High-pH stress corrosion cracking (SCC) failures of underground pipelines have occurred in a wide variety of soils, covering a range in color, texture, and pH. No single characteristic has been found to be common to all of the soil samples. Similarly, the compositions of the water extracts from the soils have not show…
Powder X-ray diffraction experiments of the antiferroelectric PbHfO 3 were performed between 8K and 525K using a conventional X-ray generator and a synchrotron radiation. Antiferroelectric superlattice reflections and reflections at R-point appeared below 435K on heating. Reflections associated with a large cell volum…
The dielectric properties of organic-porous silica films deteriorate after photoresist removal processing. plasma ashing has been commonly used to remove photoresist. Nevertheless, the plasma will destroy the functional groups and induce moisture uptake in porous silica films. In this study, trimethylchlorosilane (TMC…
Structural analysis of the solvated mixed-valence (MV) trinuclear iron carboxylate, [Fe3O(HCO2)6(γ-pic)3]·x(γ-pic), 1, (γ-pic = 4-methylpyridine; x ≈ 1.3), has been performed from X-ray diffraction data at four temperatures. Analysis of the X-ray diffraction and variable temperature Mössbauer data for 1 clearly shows…
At –25°C, the sequential block copolymerizations of 4-(tert-butyldimethylsilyloxy)styrene (TBDMSS) and 4-methylstyrene (4MS) were investigated by using a syndiospecific living polymerization catalyst system composed of (trimethyl)pentamethylcyclopentadienyltitanium (Cp*TiMe3), trioctylaluminum (AlOct3) and tris(pentaf…
The luminescent property of Eu 3 + in ( Sr 0.99 La 1.01 ) Zn 0.99 O 3.495 solid solution was systematically examined. ( Sr 0.99 La 1.01 ) Zn 0.99 O 3.495 was newly found in the Sr-La-Zn-O system. Under ultraviolet excitation, emission intensity increases with increasing Eu 3 + concentration to y = 0.7 in ( Sr 0.99 La…
Diamond like carbon (DLC) films were deposited on to titanium (Ti) substrates by Plasma Enhanced Chemical Vapour Deposition (PECVD) process. The quality of the films were checked by Raman spectra and nano-hardness tests. The cytocompatibility of titanium and DLC coated titanium were studied using continuous cell lines…
Shear bands were generated under prescribed and controlled conditions in stainless steel (Fe‐18%Cr‐8%Ni). Hat‐shaped specimens, deformed in a Hopkinson bar were used, yielding strain rates of approximately 104s−1 and shear strains that could be varied between 1 and 100. Specimens recovered from the collapse of thick‐w…
The effects of several critical assumptions and parameters on the computation of strain energy release rates for delamination and debond configurations modeled with plate elements have been quantified. The method of calculation is based on the virtual crack closure technique (VCCT), and models of the upper and lower s…
In many intensive agroecosystems continued inputs of phosphorus (P) over many years can significantly increase soil P concentrations and the risk of P loss to surface waters. For this study we used solid-state 31P nuclear magnetic resonance (NMR) spectroscopy, high-power decoupling with magic angle spinning (HPDec–MAS…
In order to investigate the mechanical properties of Gd123 single-grain bulk superconductors fabricated using a modified QMG method, tensile tests in the direction of the a/b-or c-axis of small specimens cut from bulk samples have been carried out at 293K. As for the mechanical properties perpendicular to the c-axis,…
In-situ reaction and texture development were investigated during heat treatment in reactive templated grain growth (RTGG) processing for textured SrTiO3 (ST) ceramics. Platelike Sr3Ti2O7 (S3T2) particles were used as a template and aligned S3T2 particles were heat-treated with stoichiometrically required amounts of T…
is one of the defect silicate apatites. -doped i.e. , solid solutions, were synthesized and their luminescent properties were studied. The emission intensity increased with increasing concentration up to and decreased to At it raised again dramatically. In addition, the lattice parameter, a , decreased quickly with in…
Using Ti–Ta alloy to which Ta was added systematically, i.e. Ti–5 mass%Ta, 10 mass%Ta, 20 mass%Ta, 30 mass%Ta, 40 mass%Ta and 50 mass%Ta alloys, the effect of Ta concentration on phase constitution in the solution treated and quenched state and aging behavior is studied by electrical resistivity and Vickers hardness m…
Electron stimulated carbon adsorption at room temperature has been studied in the context of radiation induced surface modifications in the vacuum system of particle accelerators. The stimulated carbon adsorption was monitored by Auger electron spectroscopy (AES) during continuous irradiation by 2.5 keV electrons and…
Elastomeric bearings have had an exemplary performance record over the past 40 years. Recently, increased testing requirements have been imposed that now make the testing of elastomeric bearings one of the major costs in constructing the supports. Currently, four low-temperature tests are required for elastomeric bear…
Barium titanate (BaTiO3) films were prepared on (100)Pt/(100)MgO substrates by metal-organic chemical vapor deposition (MOCVD). The effects of deposition temperature (Tdep) and O2 partial pressure (PO2) on the microstructure and dielectric properties of the films were investigated. The BaTiO3 films prepared at Tdep=87…
Formulas for the expansion of arbitrary invariant group functions in terms of the characters for the Sp(2N), SO(2N+1), and SO(2N) groups are derived using a combinatorial method. The method is similar to one used by Balantekin to expand group functions over the characters of the U(N) group. All three expansions have b…
The objective of this study is to compare the reactivity of two polymorphs of flufenamic acid with ammonia and relate it to crystal packing. Forms I and III of flufenamic acid were exposed to dry ammonia vapor. Optical microscopy, microscopic Raman, and XRPD were used to characterize the possible changes. The differen…
A reverse approach to designing as-built transformers is presented in this paper. The physical characteristics and dimensions of the windings and core are the specifications. By manipulating the amount and type of material actually to be used in the construction of the transformer, its performance can be determined. S…