Materials Literature
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The low-temperature superplastic flow behavior of two lots of Ti-6Al-4V sheet with an ultrafine microstructure was modeled. One lot (Sheet A) had an equiaxed-alpha starting microstructure; the flow stress/flow hardening exhibited by this material was explained on the basis of the Bird-Mukherjee-Dorn constitutive equat…
Abstract In accordance with high‐resolution transmission electron microscopy (HRTEM), (Ti 34 Al 66 )N/Cu physical vapour deposition (PVD) composite coating had a nanolaminated structure with 20 nm (Ti 34 Al 66 )N and 2.0–5.0 nm fine grain recrystallized Cu layers. It was unexpectedly found that the coatings under inve…
Nano-scale strengthening has been studied for Fe and Fe-based alloys and found to be a function of grains, subgrains, and particles. In Fe–C/O alloys, these microstructural features can result from phase transformations and deformation processes. The relationships between these structural features and strength have be…
First-principles studies of the geometric structures, electronic structures and second-order nonlinear optical properties of polar alkali metal-Mo(VI)-iodate compounds (AMoO(3)(IO(3)) (A = Li, Rb and Cs)) have been performed within density functional theory and the independent particle approximation. Our results indic…
TiO 2 thin films have been deposited on glass and indium tin oxide (ITO) coated glass substrates by sol–gel technique. The influence of annealing temperature on the structural, morphological and optical properties has been examined. X-ray diffraction (XRD) results reveal the amorphous nature of the as-deposited film w…
In order to investigate the effect of the microstructure on the oxygen permeation in Ba 0.95 La 0.05 FeO 3−δ membranes, three different methods such as solid‐state reaction, nitrate and acetate decomposition (NAD), and amorphous malic acid precursor (AMP) methods were used to fabricate membranes with different grain s…
High dielectric constant ( k ) CaCu 3 Ti 4 O 12 (CCTO) has been studied as a potential filler for low‐temperature cofired ceramics (LTCC) based on typical calcium aluminoborosilicate glass. CCTO does not appear to be chemically reactive with the glass regardless of the firing temperature over the compositional range o…
Abstract Poly(imide‐amide)s (PIAs) and poly(imide‐ester)s (PIEs) containing two Si‐atoms in the repeating unit were synthesized from acid dichlorides and diamines and diphenols, respectively. The acid dichlorides were obtained from the dianhydrides, which reacted first with glycine and then with thionyl chloride. The…
We present the studies on static and transient optical characteristics of electrospun poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4- phenylenevinylene]/poly(vinyl pyrrolidone) (MEH-PPV/PVP) nanofibers. [6,6]-phenyl-C61 butyric acid methyl ester is mixed into the polymer matrix, working as quenchers to optical excitons. Comp…
Abstract Energy of metal–metal (Me–Me) and metal–hydrogen (Me–H) bonds in hydrogen‐free and hydrogen‐charged fcc iron, nickel, and iron–nickel alloys are ab initio calculated. It is shown that short‐range decomposition of Fe–Ni solid solution and difference in Fe–H and Ni–H bonds are responsible for splitting of γ ref…
Abstract In this article, truly degradable composites were prepared using sweet sorghum fibers which are residue of ethanol fermentation industry as reinforcement and renewable resource‐based biodegradable polyester, poly( L ‐lactide) (PLLA) as matrix, they were fabricated by melt‐blending. The effect of different kin…
Abstract Clay/polymer nanocomposites, of the type montmorillonite/poly(glycidyl methacrylate) (MMT/PGMA), were synthesized via atom transfer radical polymerization (ATRP). MMT was amino‐silanized and then reacted with 2‐bromoisobutyryl bromide (BIB) to provide NH‐C(‐C(CH 3 ) 2 Br groups attached to the clay. The lat…
Electric-field enhancement of photovoltaic devices by carbon nanotubes (CNTs) is reported as a third alternative for increasing the efficiency of photovoltaic devices. Due to the formation of an efficient electronic energy-cascade structure, the decrease of the interfacial resistance, and the improvement of the electr…
Zirconia‐based materials, with very low or null doping contents (YO 1.5 between 0% and 4% mol), were prepared in the form of bulk nanostructured materials through a two‐step process. Nanometric powders of size‐stabilized tetragonal zirconia were synthesized by the Pechini method and subsequently densified using the hi…
Abstract A comparative study of chemical and enzymatic methods of aniline polymerization was carried out. Fungal laccase from Trametes hirsuta was used in the synthesis of polyaniline nanoparticles made with poly(2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid) (PAMPS). Template polymerization of aniline was carried out…
Abstract Polyethylene is already one of the most commonly used polymers due to its solvent resistance and easy processing. Low‐density polyethylene (LDPE) also has excellent flexibility and resilience. However, the mechanical properties of LDPE are often poor. We added the inexpensive ceramic filler Boehmite to LDPE,…
The combination of lithographic patterning and nanostamping methods makes it possible to accurately define diffraction-limited multicolor (wavelengths 560–620 nm) light sources on a silicon substrate. We demonstrate a postprocessing technique that utilizes standard photolithography process to pattern the cathode of to…
Ge-doped SbTe (Ge–ST) was compared with Ge2Sb2Te5 (GST) for its potential use in the phase-change memory with improved stability at varying ambient temperature (TA). Device characteristics such as RESET current, RESET resistance, and SET resistance of Ge–ST devices were found to vary significantly less with TA than th…
Abstract Binary and ternary composites composed of polyoxymethylene (POM), polyurethane (PU), and carbon nanofiber (CNF) were produced by water‐mediated melt compounding. PU latex and/or aqueous CNF dispersion were introduced into the molten POM in laboratory kneader to prepare toughened and/or nanoreinforced POM comp…
The solubility of griseofulvin in acetone, 2-butanone, 1,2-dichloroethane, N, N -dimethylacetamide, dimethyl sulfoxide, and N -methyl-2-pyrrolidone have been determined by the dynamic method. The experimental data were well-correlated with the modified Apelblat equation.