Materials Literature
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We present the HoloDark technique which has recently been invented and allows one to map strain in two dimensions in layers and devices with nanometer resolution, high precision and large field of view. The technique is based on electron holography and is applicable to all standard focused-ion beam FIB prepared crysta…
There are numerous tests performed on stator coils designed to operate in high voltage electrical generators. There are tests performed to qualify a stator coil design. There are tests that are performed on each production coil at various steps in its production cycle. There are tests performed as a quality check and…
Atomic Vapor Deposition (AVD) technique was successfully applied for the depositions of amorphous HfO2, Sr-Ta-O and Ti-Ta-O thin films, which were investigated as alternative dielectrics to replace the standard SiO2 or Si3N4 dielectrics used in Metal-Insulator-Insulator (MIM) capacitors. Metal oxides were grown on 200…
The production method of a driving axles used in gearbox is presented in this paper. A five-stage cold extrusion technology for forming the driving axle was made. First, simulations based on thermal-mechanical coupling finite element model were performed with Deform_2D. During the forming process, the concave appeared…
A simple, cost-efficient method for purification of E. coli -derived recombinant Taq DNA polymerase isolated from the thermophilic bacterium Thermus aquaticus is described. Recombinant Taq DNA polymerase was purified using an aqueous two-phase extraction method following a primary treatment of heat denaturation. The e…
The effect of elements such as Ti, Al, Hf, Zr and B on hot tearing susceptibility during directional solidification was explored by tube-like samples with thickness of 1.0 mm, 1.5mm and 2.0mm in wall. Results of SEM of elements on solidification of casting Ni-based superalloys were presented. The influential extent am…
Cold rolling precision forming process of spline is one of the high-efficiency, precision and non-chip forming advanced manufacturing technologies. It has the characteristics such as high forming efficiency, energy-saving, low material consumption and better forming properties of components. The principle and the forc…
Lead free thick film NTC (negative temperature coefficient) thermistors based on perovskite-type semiconducting materials of different compositions BaFe 0.9 Sn 0.1 O 3 + BaBiO 3 , and BaFe 0.9 Sn 0.1 O 3 + BaBiO 3 + CuO were fabricated on alumina substrate by screen printing technology. The evolution of microstructure…
Growth of SiC nanowires in plasma-assisted hot filament chemical-vapor-deposition by using hexamethyldisiloxane (HMDSO) as the gas source is reported. The SiC nanowires (SiC-NWs) grew on Au-coated silicon substrate with core-shell structure, where the core consisted of polycrystalline SiC grains and the shell exhibite…
Uranium doped TiO2 (U-TiO2) nanomaterials, determined by scanning electron micro- graphy (SEM), were successfully synthesized via a simple, effective and environmental benign solid state reaction route. The characterizations via XRD and XPS showed that the uranium has been entered into the framework of anatase TiO2. T…
Mineral polymer is a new category of inorganic non-mental materials, which was manufactured from fly ash in this paper. Changes of fly ash in the polymerization can be described as: (1) Q4(0Al) is the main form of Si element in fly ash, with 67.5%content.During the solidification of mineral polymer, the content of Q4(…
The effect of a phosphorus atom introduced in a zeolite cluster involving ten silicon and aluminum atoms on the state of active catalytic structure sites is estimated. Zeolite clusters modified with boron are also considered. The effect of the electron density redistribution upon zeolite modification with boron and ph…
Electrodeposited copper foil was prepared by direct current electrodeposited method. Effects of different RE additions including 0, 3mg/L, 6mg/L and 9mg/L on the morphology, roughness, and mechanical properties of electrodeposited copper foil are investigated at high current density and high flow rate by SEM (scanning…
In cold rolling process, asymmetric shape defects are still a common problem to strip quality. For the mills with inverse symmetry roll shifting system, different roll wear and thermal contour of top roll system and bottom roll system could cause asymmetric shape defects during shifting operation. In this paper, three…
It is still in focus the problem of obtaining high quality polycrystalline materials by means of sintering fine diamond powders. The most important task of this problem is the consolidation or improvement of the processed polycrystalline diamond. It is worldwide recognized that the plastic deformation of the diamond p…
This paper presents the advantages of carbon nanotubes and graphene for spintronics. The advantage of CNT and graphene can be illustrated by experimental data on the basic structure composed a lateral channel connected to magnetic electrodes. In the simplest situation, i.e lateral channels between ferromagnetic source…
Ultra-high molecular weight polyethylene fiber plain woven fabric reinforced line-low-density polyethylene composites with different matrix volume fraction were prepared. The interfacial bonding strength and the impact property of the laminates were investigated. The experiment results revealed that the sample with a…
The focus of this study was an investigation of the thermal and structural properties of a series of piperidinium (PIPxx) and morpholinium (MORPxx) iodide salts. This study explores the effects changes in the alkyl chain length and ring conformation has in the melting point and crystal packing. As well heteroatom subs…
In this work, we focus on effects of the flow field design and the operation conditions on local current transients, which are induced by start-up and shutdown processes in a polymer electrolyte fuel cell (PEFC). Submillimeter resolved in situ diagnostics are employed for the measurement of local current transients in…
Titania supported Pt electrocatalysts (Pt/TiO2) were synthesized and investigated as alternative cathode catalysts for polymer electrolyte membrane fuel cells (PEMFCs). Transmission electron microscope (TEM) images revealed uniform distribution of Pt nanoparticles (dPt = 3-5 nm) on the TiO2 support. In-house developed…