Materials Literature
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Nanometric multiferroic LaFe1-yi£? yO3, (0.0 ≤ y ≤ 0.03, step 0.01) samples were successfully synthesized using citrate autocombustion method. The X-ray diffraction (XRD) data reveal that all the samples have single phase orthorhmbic structure. The high resolution transmission electron microscope (HRTEM), energy dispe…
Generally, chrome thin film is used for shading material of a photo mask. Pattern precision of the chrome mask is unstable in chrome wet etching, and process cost and environmental risk increase in chrome dry etching using chlorine gas. In this study, we investigate dry etching method using non-chlorine gas for the Cr…
To understand deformation mechanisms of non-basal slip in magnesium, [1010] tensile tests were carried on pure magnesium single crystals in various temperatures. While the crystal fractured as brittle manner at room temperature, the crystals were deformed by {1011}<1123> first order pyramidal slip and showed ductility…
Focused-ion-beam chemical vapor deposition (FIB-CVD) is a useful tool for nanostructure fabrication because it enables us to fabricate the arbitrary three-dimensional (3-D) nano- and microstructures. In this study, a method for the homogeneous growth of ultra-long overhang nanostructures was investigated. As a result,…
Effects of ambient temperature, O_2 concentration and injection duration on combustion and emission characteristics of diesel spray under high temperature and high pressure ambient were experimentally examined using a constant volume vessel. It is confirmed that the ambient temperature /pressure has large effect on th…
Det stigende antal nanomaterialer, som introduceres på markedet disse år, øger behovet for risikovurdering af disse materialer. Da det ikke er muligt at vurdere risikoen særskilt for hvert enkelt nanomateriale, er der behov for en forskningsstrategi på området, som prioriterer de tilgængelige økonomiske og tidsmæssige…
The uniqueness of a solution in the small sense (in the sense of lack of infinitely close solution) is proved for the boundary-value problem of equallystressed reinforcing metal composite plates in conditions of steady creep of materials of all phases of the composition, when in addition to static and kinematic boundar…
In this study, the effect of plastic deformation on microscopic structure and anisotropy of elastic modulus in SPCC (Steel Plate Cold Commercial) is investigated. Various plastic strains (0%, 2.5%, 5%, 7.5%, 10%) are applied to annealed SPCC plates, then, specimens for tensile tests are cut out from them. The elastic…
The nano/microstructured Y0.95Eu0.05PO4 have been hydrothermally synthesized by changing the pH value and PO4/RE molar ratio. The structures and morphologies of the as-synthesized Y0.95Eu0.05PO4 have been investigated by X-ray powder diffraction (XRD), thermogravimetric analysis (TGA) and field-emission scanning elect…
Influence of polymer additives on transfer ratio in gravure printing have been experimentally studied with a liquid transfer model test consisted of a static lower plate with a very small cavity and a movable upper flat plate. Dilute polymer solutions have examined and those results were compared with those of Newtoni…
During extrusion-cooking of starchy products, the molten material is forced through a die so that the sudden pressure drop causes part of the water to vaporize giving an expanded, porous structure. The moisture is lost due to evaporation and heat transfers, as the material cools down. Thus the material crosses glass t…
A three-scale approach for textile models was given in [1]: a one-dimensional fiber model and a room model, with a meso-level in between, which is the yarn scale. To analyse and simplify the model, its characteristic times are investigated here. At these times the fiber and yarn model, and the yarn and room model, res…
Thermal barrier coatings (TBC) is indispensable technique for advanced gas turbines. However, thermally grown oxide (TGO) is formed at the interface between a top and a bond coatings of the TBC in a high temperature environment, and the TGO can induce delamination or spallation of the TBC. By Cerium (Ce) addition to c…
Phasefield simulation ofmicrostructure evolution and material property of
Diplomska naloga predstavlja izracun investiciji v postavitev soncne elektrarne, ki jo bomo implementirali z razlicnimi vrstami soncnih modulov. Omejili se bomo na mikro soncne elektrarne, kar pomeni, da instalirana moc soncne elektrarne ne presega 50 kWp. Izgradnja soncne elektrarne lahko predstavlja velik financni s…
It has been clarified that fracture accompanying a fish-eye on its fracture surface occurred under long fatigue life regions in the stepwise S-N curve of an austenitic stainless steel obtained at 700℃. After a large fish-eye, which origin was located at the interior of the specimen, had reached the specimen surface, t…
High frequency differential transmission spectroscopy of graphene, probing near the M-point, is performed and analyzed theoretically. Electron-phonon coupling is identified as the chief mechanism for renormalization with an effective acoustic deformation potential of approximately 5eV.
Ti-Ni shape memory alloy (SMA) is the functional material which has shape memory properties and superelasticities. Since Ti-Ni SMA works well at temperatures below 373K, this SMA is expected to be a driving source of heat-engines using low-temperature thermal energy. However, previous SMA heat-engines have several pro…
In recent years, because of the expansion of the digital consumer electronics market and automotive electronics, demand for personal computers and mobile phones is increasing. Copper alloys are used as the lead frame members mounted on the IC chip of the electronic device. In this study, we attempted the production of…
Sub-surface fatigue fractures in titanium alloys are frequently observed in very high cycle region. However, the mechanism of sub-surface fractures has many unclear points. This study focused on an idea that the environment around sub-surface cracks resembles vacuum environment. To reveal the effects of vacuum environ…