Materials Literature
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Heterogeneous nucleation and crystallization of lithium alumosilicate glasses with hafnia‐containing nucleation agents was explored. Kinetic, thermodynamic, and structural data were considered to assess nucleation efficiency and to characterize the crystallization process. It is shown how lattice parameters and, parti…
Pulsed laser ablation (PLA) was used to prepare nanoparticles of barium titanate (BaTiO 3 ). PLA using a titanium‐rich Ba–Ti–O ceramic target in oxygen ambience at 400 Pa and following online annealing at 1073 K enabled the production of BaTiO 3 nanoparticles (BTNPs) with a perovskite structure having nearly stoichiom…
Three-dimensional dissipative particle dynamics (DPD) simulations were performed to investigate the phase separation dynamics of semidilute polymer solutions with different polymer chain length and stiffness. For the polymer solution composed of shorter and more flexible chains, a crossover of the domain growth expone…
This article presents the experiment process and results of abrasive water jet perforation. This experiment was conducted in Kalamayi, China, Xinjiang Oilfield in October 2004. Referring to explosive perforation experiment, we made two cement cylinder samples with a diameter of 2.4 m, 1.2 m high, putting a 139.7 mm (5…
Polyaniline nanofibers (Pani nanofibers) have exhibited high performance and fault tolerant properties for dielectric elastomer actuator devices. Electrodes comprised of uniformly sprayed Pani nanofibers in thicknesses 0.7 μm, 1.1 μm, 1.3 μm, and 1.5 μm have shown the following high strains: 65% in area fo…
Development and test results of a rotor blade twist control system that utilizes a thermo-mechanical shape memory alloy (SMA) are presented. The actuation system controls the blade shape during flight operations allowing the blade to be configured for greater lift during takeoff and landing. SMA actuators provided an…
Synthetic crystals of melanotekite and kentrolite were obtained at 850 °C from melt. The aluminum analogue of kentrolite Pb 2 Al 2 Si 2 O 9 was hydrothermally synthesized at 2 GPa, 650 °C together with zoisite-(Pb) and margarite-(Pb). Synthesis products were characterized by single-crystal diffraction studies and micr…
Trilayer actuators were constructed using polypyrrole (PPy) films doped with dodecylbenzene sulfonate (DBS). Identical 5-20 μm PPy/DBS films were grown on either side of a 110 μm poly(vinylidene fluoride) (PVDF) membrane to serve as working and counter electrodes with respect to each other. The performance of the tril…
We explore the adsorption behavior of Ne and CF 4 in as-produced carbon nanohorn aggregates using adsorption measurements and computer simulations. Despite the difference in specific surface area observed for these gases, the isotherms for both gases show the presence of two substeps before monolayer completion. With…
We investigate the detailed electronic structure of $\mathrm{Pr}\mathrm{Co}{\mathrm{O}}_{3}$ and its temperature evolution by using high-resolution photoemission spectroscopy and ab initio band structure calculations. We observe that, in addition to the correlation effect, spin-orbit interaction plays an important rol…
Abstract In‐depth interpretation of ring‐banded spherulitic morphology, crystals, polymorphism, and complex melting behavior in poly(1,4‐butylene adipate) (PBA) were analyzed via a procedure of designing composite core‐shell spherulites, in which two lamellar patterns (ring‐band vs. ringless) were packed by subjecting…
Conducting polymer trilayers are attractive for use in functional devices, given low actuation voltages, operation in air and potentially useful stresses and strains; however, their dynamic behavior must be understood from an engineering perspective before they can be effectively incorporated into a design. As a step…
We calculate the ground-state energy of Dirac electrons in graphene in the presence of disorder. We take randomly distributed charged impurities at a fixed distance from the graphene sheet and surface fluctuations (ripples) as the main scattering mechanisms. A mode-coupling approach to the scattering rate and random-p…
Robust joining approaches for silicon carbide ceramics are critically needed to fabricate leak free joints with high temperature mechanical capability. In this study, titanium foils and physical vapor deposited (PVD) titanium coatings were used to form diffusion bonds between SiC ceramics using hot pressing. Silicon c…
Carbide Derived Carbon (CDC) coatings have been formed on Tyranno ZMI SiC fibers by the extraction of Si with chlorine in the temperature range of 550–700°C at atmospheric pressure. The kinetics and mechanisms of the growth of carbon coating on the Tyranno ZMI SiC fiber have been investigated, and process parameters h…
Abstract Ordered nanostructures are observed in the melt and solid state for a series of three peptide/PEG conjugates containing fragments of amyloid β ‐peptides. These are conjugated to PEG with $\overline M _{\rm n}$ = 3 300 g · mol −1 and a melting temperature T m = 45–50 °C. The morphology at room temperature is e…
Abstract Crystallization and melting behaviors of isotactic polypropylene (iPP) nucleated with compound nucleating agents of sodium 2,2′‐methylene‐bis (4,6‐di‐ tert ‐butylphenyl) phosphate (hereinafter called as NA40)/dicyclohexylterephthalamide (hereinafter called as NABW) (weight ratio of NA40 to NABW is 1:1) were s…
Beta titanium (Ti) alloys are one of the most promising groups of Ti alloys for biomedical applications. This work presents the production, microstructural characterization, and mechanical properties of as-cast Ti-10Mo-xNb (x = 0, 3, 6, 9, 20, and 30) alloys. They were produced via arc melting and characterized by sca…
A novel concept for a high-frequency, low-loss interconnect with significant skin effect suppression over a wide frequency band is presented. The concept is based on a multilayer comprising thin magnetic (Ni80Fe20) and metal (Cu) layers. The negative permeability of the magnetic layers leads to a near-cancellation of…
The structural evolution of a trioctahedral mica from Cava St. Antonio, Mt. Vulture, Potenza, Italy, has been studied in the temperature range 100-1023 K using in situ single-crystal X-ray diffraction techniques. The sample used shows a Ti-rich composition close to the phlogopite-annite join with the following crystal…