Materials Literature
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Laminated composite beams containing magnetostrictive layers are modeled as distributed parameter systems and the magnetostrictive layers are used to control the vibration suppression. Velocity feedback with constant gain distributed controller is chosen to achieve vibration suppression. A general formulation of the p…
Grinding lanthanum oxide (La 2 O 3 ) with Al 2 O 3 was conducted to investigate their mechanochemical reactions to form lanthanum aluminate (LaAlO 3 ) powder using a planetary ball mill. Grinding for 120 min allowed us to obtain single‐phase LaAlO 3 with a large surface area when transition alumina was used, whereas n…
We have studied the occurrence of superconductivity under pressure in the ${\mathrm{CaSi}}_{2}$ family of compounds, namely the semimetallic trigonal phase and the $\ensuremath{\alpha}\ensuremath{-}{\mathrm{ThSi}}_{2}$-type tetragonal one. Although only the latter is superconducting ${(T}_{c}=1.56\mathrm{K})$ at ambie…
Synopsis Today’s shampoo formulations are beyond the stage of pure cleansing of the hair. Additional benefits are expected, e.g. conditioning, smoothing of the hair surface, improvement of combability and lather creaminess. Cationic polymers play an important role in providing many of those features. Therefore, within…
Abstract Layered polymer/calcium carbonate (CaCO3) composite films have been successfully obtained by alternate repetition of spin-coating of polysaccharides and thin film crystallization of CaCO3 in the presence of an acid polymer. SEM images show layered structures consisting of brick of the inorganic crystal and mo…
Experimental data for the temperature dependence of relaxation times are used to argue that the dynamic scaling form, with relaxation time diverging at the critical temperature T(c) as (T-T(c))(-nuz), is superior to the classical Vogel form. This observation leads us to propose that glass formation can be described by…
The optical properties of ${\mathrm{Nd}}^{3+}$ ions in six different compositions of glasses based on ${\mathrm{GeO}}_{2},$ PbO, and ${\mathrm{Bi}}_{2}{\mathrm{O}}_{3}$ have been investigated by using steady-state and time-resolved laser spectroscopy. Judd-Ofelt parameters were derived from the absorption spectra and…
Ferrite nanocrystals have been synthesized by use of functionalized surfactantsto give nanoparticles doped with 3.5 % in mass of cobalt ions. These nanoparticles can be aligned on a substrate on a very large scale when the particles are deposited in the presence of a magnetic field (see Figure). In the absence of an a…
The crystallization behavior of nitrogen-doped amorphous Ge 2 Sb 2 Te 5 -(N) phase-change thin films was studied by utilizing differential scanning calorimetry, in situ ellipsometry and in situ transmission electron microscopy. The combined analysis of in situ ellipsometry isotherms of amorphous Ge 2 Sb 2 Te 5 -(N) fi…
A systematic study has been made of some of the properties of R2, the most dominant paramagnetic defect produced in type-IIa diamond by electron irradiation. R2 has been produced in high-purity synthetic diamonds, which have been irradiated with 2 MeV electrons in a specially developed dewar, allowing irradiation down…
Decreased hepatocyte adhesion to polymeric constructs limits the function of tissue engineered hepatic assist devices. We grafted adhesion peptides (RGD and YIGSR) to polycaprolactone (PCL) and poly-L-lactic acid (PLLA) in order to mimic the in vivo extracellular matrix and thus enhance hepatocyte adhesion. Peptide gr…
Relativistic full-potential calculations within the generalized gradient approximation (GGA) for a series of Mn-based Heusler alloys are presented. Calculated equilibrium lattice parameters deviate less than 1.2% from the experimental values. The main features of a half metallic system are present in the density of st…
R ‐curves of lead zirconate titanate (PZT) have been measured with compact tension (CT) specimens for different poling conditions and grain sizes. Depending on poling direction the plateau value of the R ‐curves ranged from 1.13 to 1.54 MPa·m 1/2 for a grain size of 6.4 μm and from 1.14 to 1.30 MPa·m 1/2 for a grain s…
Nanoscaled AgxAu1−x (0.2<x<0.8) alloy particles were synthesized by putting gold and silver particles into pores of monolithic mesoporous silica by soaking and annealing method. It has been found that in optical absorption spectrum, the surface plasmon resonance (SPR) maximum of AgxAu1−x alloy particles…
Abstract Control of coalescence is a critical factor in preparing polymer blends with specific morphologies. Coalescence was studied as a function of shear rate, volume fraction, viscosity ratio, and amount of block copolymer in a model system comprising polystyrene (PS) and high density polyethylene (HDPE). Small dro…
R ‐curves, process zones, and shielding stresses of barium titanate (BaTiO 3 ) and partially stabilized zirconia (PSZ) have been studied using compact‐tension (CT) specimens. BaTiO 3 and PSZ exhibited pronounced R ‐curves that rose over similar crack lengths and showed steady‐state toughnesses of 0.7 and 6.4 MPa·m 1/2…
Selected condensation products of aromatic aldehydes and p-phenylenediamine have been synthesized and evaluated as corrosion inhibitors for mild steel (MS) and oil-well steel (N-80) in 15% hydrochloric acid (HCl) at 105°C ± 2°C by the weight loss method. All the condensation products showed excellent performance. 2,4-…
Optical and x-ray scattering studies of a chiral, organosiloxane smectic-A liquid crystal indicate a large field induced optical tilt of up to 31 degrees accompanied by a very small contraction of the smectic layers. This result suggests that the molecules have a nonzero tilt even with no applied field, and that the p…
Multi-resolution signal decomposition (MSD) technique of wavelet transforms has interesting properties of capturing the embedded horizontal, vertical and diagonal variations within an image in a separable form. This feature was exploited to identify individual partial discharge (PD) sources present in multi-source PD…
Suspension bridge cable inspections have revealed severely corroded and broken wires in some main cables. Accelerated, cyclic corrosion studies were conducted to assess the relative effect of general corrosion, corrosion cracking, and hydrogen embrittlement on the deterioration in material properties of high-strength…