Materials Literature
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Highly stressed machine parts such as gears and shafts are often surface treated to increase wear and fatigue resistance at critical locations. For example, induction surface hardening (ISH) is increasingly used in the automotive and aerospace industries thanks to the availability of modern multiple frequencies genera…
This paper describes the pyrolysis and combustion characteristics of PVC and PP from municipal solid waste applying the non-isothermal thermogravimetric analysis, the apparent activation energy and the pre-exponential factor were obtained by kinetics analysis. There is one phase in the pyrolysis of PP, which is volati…
The effect of the surface preparation in samarium doped semiconducting barium titanate [(Ba1-xSmx)TiO3] ceramics with (Ba, Sm)/Ti ratio of 1.000 was studied by means of isotope tracer technique using a secondary ion mass spectrometer. The surfaces of specimens were prepared with the chemical mechanical polishing (CMP)…
We show that the fluctuations associated with ferro orbital order in the $d_{xz}$ and $d_{yz}$ orbitals can develop a sharp resonance mode in the superconducting state with a nodeless gap on the Fermi surface. This orbital resonance mode appears below the particle-hole continuum and is analogous to the magnetic resona…
Abstract The results of the studies on the influence of the phase transfer catalyst on the epoxidation of (Z,E,E)-1,5,9-cyclododecatriene (CDT) to 1,2-epoxy-5,9-cyclododecadiene (ECDD) in the H 2 O 2 /H 3 PW 12 O 40 system by a method of phase transfer catalysis (PTC) were presented. The following quaternary ammonium…
On page 5091 Prof. Jun Zhou, Prof. Kaifu Huo, and co-workers demonstrate high-performance all-solid-state supercapacitors based on flexible, free-standing mesoporous vanadium nitride nanowire (MVNN)/carbon nanotube hybrid electrodes. The MVNNs are synthesized by way of a hydrothermal synthesis followed by thermal nitr…
The transformation mechanisms of layered silicates during the formation of vermiculite (vermiculitization), smectite (smectization), illite-like minerals (illitization), and soil chlorites (chloritization) have been considered. The mechanism of olivization has also been discussed. The manifestation features of these p…
100-oriented epitaxial Pb(Zr,Ti)O3 [PZT] films with various Zr/(Zr+Ti) ratios from 0 to 0.8 were grown on (100)c SrRuO3∥(100) SrTiO3 and (100)c SrRuO3∥(100) LaNiO3∥(001) CaF2 substrates. 200-nm-thick films grown on CaF2 substrates consisted of a pure tetragonal phase up to the Zr/(Zr+Ti) ratio of 0.8. On the other han…
Electron structure investigations of smooth hydrocarbon thick films with a high atomic D/C ratio, redeposited from deuterium plasma discharge onto the vacuum vessel regions of the T-10 tokamak, are continued. For the first time, the investigations of both film sides and in a valence band region were performed by X-ray…
A numerical study of the electromagnetic properties of a liquid crystal-tunable metamaterial absorber (LCTMA) is presented. This artificial structure is characterized by an efficient absorption of terahertz electromagnetic radiation in a narrow frequency range. The selective absorption in the metamaterial is tuned by…
The structure of a titanium iodide single crystal obtained by zone melting has been studied by metallography, X-ray diffraction, and electron microscopy. It has been shown that the initial bcc titanium single crystal becomes a pseudosingle crystal upon cooling below the temperature of the β → α polymorphic transition.…
The austenitic stainless steels are used in nuclear spent fuel reprocessing and waste management plants and the process fluid is nitric acid at temperature up to boiling point. However incorporation of oxidizing ions e.g. fission products as well as corrosion products, in nitric acid stream make the environment highly…
While aluminum-based metallization schemes on Si and corresponding top-side connections via Al-bonds have been optimized for the last decades and are well understood today, only few investigations have been done on the interaction of thick Cu wire-bonds and copper-metallizations on SiC. In this work the mechanical as…
We report on a study of target-thickness effects on the degree of the linear polarization as well as on the emission probability of bremsstrahlung arising in the collision of 100 keV electrons with thin gold targets. For this purpose an experiment at the electron source SPIN at the TU Darmstadt as well as Monte Carlo…
A simple method is developed for the synthesis of carbon nanotubes (CNTs) using Mo-Co/MgO catalyst by a thermal chemical vapor deposition (CVD) technique. Acetylene was used as the source of carbon and nitrogen as carrier gas. A series of MgO supported Mo-Co catalysts were prepared by the combustion route using urea a…
To obtain lead-free 0.5Ba (Zr 0.2 Ti 0.8 )O 3 -0.5(Ba 0.7 Ca 0.3 )TiO 3 ceramics with excellent microstructure and electrical properties, BZT-BCT ceramics doping Mn 4+ and Nb 5+ was synthesized follow a conventional solid state reaction route. By means of SEM, XRD, quasi-static d 33 meter, the influence of sintering t…
The grain-boundary and its electrical characteristics in SrCoO3doped ZnO varistors were studied. The grain-boundary around ZnO-grain is probably composed of SrCoO3, and its electrical behavior is clearly different from two conventional types of Bi-and Pr-based ZnO varitors. The non-linearity and characteristic behavio…
An oxide diluted magnetic semiconductor, Co doped ZnO thin film was successfully fabricated by cathodic electrodeposition method. X-ray diffraction studies demonstrate that the ZnCoO thin film indicates that the wurtzite structure. X-ray photospectroscopy studies suggested Co ions have a chemical valence of 2+. Optica…
Objective(s): This paper describes a selective and sensitive biosensor based on the dissolution and aggregation of aptamer wrapped single-walled carbon nanotubes. We report on the direct detection of aptamer–cocaine interactions, namely between a DNA aptamer and cocaine molecules based on near-infrared absorption at …
The methanol extracts of Terminalia chebula fruits as antibacterial agent and citric acid as a crosslinking agent have been applied on cotton plain woven fabric and the treated fabrics are then tested for antibacterial activity against bacterial strains like Staphylococcus aureus and Escherichia coli, under agar diffu…