Materials Literature
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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…
Differently from magnetoelectric (ME) crystal families (e.g., Cr 2 O 3 and phosphates) to which the ME effect is intrinsic, multiferroic composites such as ferrite/piezoelectric ceramic composites exhibit extrinsic ME effect which is known as a "product property" resulted from the interaction between the ferrite and p…
We present an effective Ginzburg-Landau theory for ferromagnetic cubic Ni-Mn-Ga in which structural and magnetic phase transitions take place. The general problem of a cubic ferromagnet is taken into account by fitting the parameters of the Ginzburg-Landau functional to experimental data. This enables us to obtain a r…
The reaction of boron with products of the thermal decomposition of hydrazine and the crystallization of boron nitride from BN solutions in supercritical N–H fluid have been studies in situ at pressures up to 5.2 GPa and temperatures up to 1600 K using angle- and energy-dispersive X-ray diffraction with synchrotron ra…
Our recent research interest has focussed on rare earth phenanthroline complexes, which are obviously of significant value for modern coordination chemistry. As a continuing part of a systematic investigation of ternary rare earth phenanthroline nitrato complexes [Y.Q. Zheng, L.-X. Zhou, J.L. Lin and S.-W. Zhang (2000…
Multi-wall carbon nanotubes (MWNTs) have been grown from simple pyrolysis of camphor, a botanical hydrocarbon, at 900°C for 15 min in argon atmosphere at ambient pressure using ferrocene as a catalyst. The nanotube diameter is fairly uniform (20-40 nm) and the yield is extremely high (∼90%). Structural characterizatio…
The purpose of the project was to develop an x-ray photoelectron spectroscopic technique to quantify film-tablet interfacial thickness. Tablets containing 99% dibasic calcium phosphate were coated with an acrylic polymer containing chlorine (Eudragit RL 30 D). The film-tablet interface was defined as the region where…