Materials Literature
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We show that the dimensions of carbon nanotubes (CNTs) in suspension can be characterized by depolarized dynamic light scattering. Taking advantages of this in situ technique, we investigate in detail the influence of sonication procedures on the length and diameter of CNTs in surfactant solutions. Sonication power is…
The peculiar redox-active character of quinonoid metal complexes makes them extremely appealing to design materials of potential technological interest. We show here how the tuning of the properties of these systems can be pursued by using appropriate molecular synthetic techniques. In particular, we focus our attenti…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTetrathiafulvalenes, Oligoacenenes, and Their Buckminsterfullerene Derivatives: The Brick and Mortar of Organic ElectronicsMichael Bendikov, Fred Wudl, and Dmitrii F. PerepichkaView Author Information Department of Chemistry and Biochemistry and Exotic Materials Institute, U…
Abstract For high-strength steels developed at the National Institute for Materials Science (NIMS) in Japan, a dispersion of nano-sized MX nitride particles along boundaries and in the matrix is achieved by reducing carbon concentration below 0.02%. This structure results in excellent creep strength at 923K, approxima…
Abstract A collaborative program by the U.S. Department of Energy and Ohio Coal Development Office aims to identify new materials for ultrasupercritical (USC) coal power plants operating at significantly higher efficiencies. These USC plants require advanced ferritic alloys, austenitic steels, and nickel-based alloys…
Abstract Tempered martensitic 9-12%Cr steels bearing tungsten, such as P92 and P122 showing higher creep rupture strength than the conventional steel P91, have been developed for thick section components in ultra-supercritical (USC) boilers. However, their creep strength is not sufficient for applying at the steam con…
Abstract Since the 1990s, the power plant market has shifted towards more flexible and efficient Steam Power Plants (SPPs) with fewer service inspections and lifetimes of ≥200,000 hours, including combined-cycle applications. This shift has driven efforts to enhance both design and materials. One approach is the insta…
Methods for the crystal structure determination from powder diffraction data are reviewed with special emphasis on the application to technical ceramics.Experimental techniques using other than laboratory X-ray, such as synchrotron radiation, neutron and electron beams, are also described.As an illustrative example, t…
Abstract The influences of ultrasonic oscillations on rheological behavior and mechanical properties of metallocene‐catalyzed linear low‐density polyethylene (mLLDPE)/low‐density polyethylene (LDPE) blends were investigated. The experimental results showed that the presence of ultrasonic oscillations can increase the…
Abstract High‐abrasion furnace black (HAF, grade N330)–filled powdered styrene butadiene rubber [P(SBR/HAF)] was prepared and the particle size distribution, mixing behavior in a laboratory mixer, and mechanical properties of P(SBR/HAF) were studied. A carbon black–rubber latex coagulation method was developed for pre…
Abstract New high temperature polyaryleneetherketone triphenylphosphine oxides incorporating trans ‐1,4‐cyclohexane, 1,3‐adamantane, and 4,9‐diamantane structural units were synthesized by the base‐promoted polymerization reaction between 4,4′‐difluorotriphenylphosphine oxide and the novel dihydroxy monomers trans ‐1,…
<div class="htmlview paragraph">Three-way catalyst systems for gasoline engines do not activate under engine cold start conditions since exhaust gas temperature is low. Zeolite based hydrocarbon (HC) adsorber substrate stores high-concentration HC emitted immediately after engine start and oxidizes when HC is re…
Abstract This paper reports about the polymerization of ε‐caprolactam monomer in the presence of low molecular weight hydroxyl or isocyanate end‐capped ethylene‐butylene elastomer (EB) elastomers as a new concept for the development of a submicron phase morphology in polyamide 6 (PA6)/EB blends. The phase morphology,…
Abstract The experimental charge density methodology is extended to macromolecular structure and biocrystallography. Ultrahigh‐resolution diffraction data now can be collected at third‐generation synchrotron sources for well‐ordered protein crystals; the data can be refined with a more sophisticated model than the ind…
Abstract Summary: A low‐density polyethylene (LDPE)/millable polyurethane (PU)/organoclay ternary nanocomposite was successfully prepared. The nanocomposites were characterized by X‐ray diffraction (XRD) and transmission electron microscopy (TEM). The nanocomposites, as evidenced by XRD, are intercalated. The heat shr…
<div class="htmlview paragraph">Operational Diesel Particulate Filter (DPF) technology traps and oxidizes soot particulate, lowering particulate emissions. Additionally they trap other non combustible material which is deposited as ash within the filter. The trapping of this material leads to increased backpress…
Abstract A series of blends of bacterial poly( R ‐hydroxybutyrate) (PHB), with different miscible amorphous components, were prepared. The molecular mass of the amorphous components was varied from M n ≈ 600 to 200,000 g/mol. Several factors were found to influence the stress–strain behavior of PHB blends: the glass‐t…
Magnetization behavior across a metamagnetic transition from an antiferromagnetic state to a ferrimagnetic state is investigated in detail for compound ${\mathrm{Mn}}_{2}{\mathrm{Sb}}_{0.95}{\mathrm{Sn}}_{0.05}$. The study clearly brings out various generic features associated with a first-order transition, viz., the…
Abstract The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than cu…
The growth mechanism of pentacene thin films on a thermally grown SiO2 on Si(100) substrate is examined in detail for a wide substrate temperature range (223–342K) by analyzing the saturated island density and island size distribution. It is found that the log plot of the saturated island density as a function of inve…