Materials Literature
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In this study, the dielectric, magnetic, and transport properties of Gd0.33Sr0.67FeO3 have been analyzed. The temperature dependence of resistivity exhibits the adiabatic small polaron hopping conduction; i.e., ρ/T=A exp(E/kBT), E being the small polaron hopping energy. The dielectric loss anomaly was found to be arou…
Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) techniques were used to investigate the kinetics of thermochemical conversion of an agricultural residue, namely the straw and stalk of rapeseed plants. The thermal degradation characteristics and the kinetic parameters (order of reaction, activa…
Abstract Ground rubber tire (GRT) powders were chlorinated by trichloroisocyanuric acid (TCLCA). GRT powders of different chlorination levels were characterized by X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDAX), attenuated total reflection infrared (ATR-IR) spectroscopy, thermal, d…
The effects of nitrogen incorporation into amorphous boron carbide (B4C) films were studied. The films were deposited by dc-magnetron sputtering with the Si substrates at room temperature. The nitrogen incorporation occurs at the expense of the boron content. The main feature of infrared absorption spectra obtained fr…
We describe an x-ray photoelectron spectroscopy spectrometer capable of determining the composition, thickness, and chemistry of thin film surfaces during growth. The instrument operates at pressures up to a few millitorr, an adequate range for many sputtering, low pressure chemical vapor deposition and thermal evapor…
This work is a theoretical study of the mechanical behavior of two different weave types: plain and twill. Traditional methods permit the study of plain weaves but prove quite difficult for twill weaves. Indeed, the difficulties related to modeling the mechanical behavior of the twill weave are due to its very complex…
This paper presents the numerical analysis for a variational formulation of rate-independent phase transformations in elastic solids due to Mielke et al. The new model itself suggests an implicit time-discretization which is combined with the finite element method in space. A priori error estimates are established for…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation M. Abdul Kader, Anil K. Bhowmick; Novel Thermoplastic Elastomers from Fluorocarbon Elastomer, Acrylate Rubb…
The effect of heat treatment on the Fourier transform infrared spectrometry (FTIR) reflection peak position of the Si–O structural band near 1087 cm −1 of a liquid‐crystal‐display substrate glass was investigated. The FTIR peak position shifted more slowly with heat‐treatment time, and to a greater extent than expecte…
Abstract The melting behavior and isothermal and non‐isothermal crystallization kinetics of poly(butylene terephthalate) (PBT)/thermotropic liquid crystalline polymer (LCP), Vectra A950 (VA) blends were studied by using differential scanning calorimetry. Isothermal crystallization experiments were performed at crystal…
The synthesis and structural characterization of a novel series of deep-red mixed-valence (MoVI/MoV) compounds with nano-sized spherically shaped cluster anions containing 18, 40, or 54 Mo atoms, respectively, is reported: Na10[H4Mo18O56(CH3COO)2] × ca. 36 H2O × 3 CH3COOH (1), (NH4)12Na12[Mo40O128] × ca. 70 H2O (2), (…
The structures and energy characteristics of a new class of nanotubes and fullerenes formed by binary layers of a trigonal network of metal atoms M and a graphite-like network of boron atoms are considered by the example of magnesium and zirconium diborides. It is shown that, contrary to the familiar carbon monolayer…
We present magnetization measurements on lightly doped ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ single crystals with $0.06<~x<~0.15$ in external fields up to 14 T at temperatures between 4.2 and 180 K. In contrast to the ferromagnetic behavior which is found for $x>~0.11,$ the sam…
The magnetic anisotropy and magnetostriction of a Lu 2 Fe 17 single crystal are investigated. The temperature dependence of the magnetic anisotropy constant K 1 is measured in the range 4.2–300 K. The results obtained are compared with the data calculated using the Callen theoretical formula. It is found that the temp…
A cryogenic experiment determining the dielectric susceptibility of the ferroelectric substance, strontium titanate, in the 90- to 300-K temperature range is described. Evidence is presented for a structural phase transition in strontium titanate at 110 K. The experiment is suitable for advanced students.
The chemical state of tungsten in the rust of low-alloy steel was analyzed by electroprobe x-ray microanalysis (EPMA) and x-ray photoelectron spectroscopy (XPS), and the electrochemical behavior of the rust was investigated by the electrochemical impedance spectroscopy (EIS) method after a wet/ dry cyclic corrosion te…
The synthesis of open-chain, tetrapyrrolic 2,2'-bisdipyrrin ligands was investigated, starting from a variety of different pyrrolic and 2,2'-bipyrrolic precursors. Four important observations were made: (1) The solubility of 2,2'-bisdipyrrins can easily be tuned through the peripheral substituent pattern, allowing the…
This paper describes the dependence on test parameters of the fatigue resistance of EPDM. Fatigue was investigated using dumbbell specimens under load control at 1 Hz until failure. Tests were made in order to create a common Wöhler (S–N) curve while increasing the stress amplitude and also to show the influence of in…
Thermomechanically coupled finite element analysis of the hot plane strain compression test has been carried out to investigate the effect of various test parameters on the measured response and deformation of specimens. The results are presented in a series of papers. In this paper (Part 1), the results of two-dimens…
A statistical model, the Ising model, is used to simulate liquid wetting of fibrous assemblies. The adhesive energy between fiber and liquid and the cohesive energy within the liquid are calculated by applying the Lifshitz theory under the assumption that the interactions between a fiber cell and a liquid cell and bet…