Several weathering steels and a plain carbon steel exposed to atmosphere for 17 years at Yokkaichi (at a coastal and industrial region) and Mikuni Pass (at a rural region) in Japan were analyzed and compared to find effects of environments on the formed rusts. Specimens were examined with electron probe microanalysis (EPMA), X-ray diffraction (XRD) and transmission electron microscope (TEM). Th...

The purpose of this study was to analyze the physical properties and chemical compositions of a new experimental cement (NEC) and compare them with mineral trioxide aggregate (MTA); pH, working time, setting time, dimensional changes following setting, flow, film thickness, and chemical composition of NEC and MTA were assessed. For chemical compositions, all specimens were imaged and analyzed b...

OBJECTIVE To evaluate the remineralization of carious dentine following the restoration of an extensive lesion in a permanent molar with a high strength glass-ionomer cement (GIC). MATERIALS AND METHODS Thirteen first permanent molars, which were scheduled for extraction because of the presence of extensive caries lesions, were selected for this study. They were first restored, according to t...

The study of silica polymorphs in impactites is important for determining the pressure and temperature impact rock formation. Silica modifications melt rocks Janisjärvi structure (Karelia, Russia) are presented by tridymite, cristobalite, quartz, trace stishovite coesite. were characterized studied scanning electron microscopy (SEM), probe microanalysis (EPMA), Raman cathodoluminescent spectros...

Measurements of highly radioactive actinides such as Np, Pu, Am, or Cm in as-fabricated irradiated nuclear fuels are crucial to improve the safety and performance fuel cycle, but also necessary find solutions environmental impact long-lived waste. Currently, most common technique measuring quantity distribution is electron probe microanalysis (EPMA). However, accurate analysis by EPMA accompani...

There are two fundamental considerations in preparing samples for electron probe microanalysis (EPMA). The first one may seem obvious, but we often find it is overlooked. That is, the sample analyzed should be representative of the population from which it comes. The second is a direct result of the assumptions in the calculations used to convert x-ray intensity ratios, between the sample and s...

Dye sensitized solar cells (DSCs) have received considerable attention once this technology offers economic and environmental advantages over conventional photovoltaic (PV) devices. The PV performance of a DSC relies on the characteristics of its photoanode, which typically consists of a nanocrystalline porous TiO2 film, enabled with a large adsorptive surface area. Dye molecules that capture p...

The plasma spray process was used to form 70%NiCrAlY + 30%TiO2 and 25%Cr2O3 5%YSZ cermet coatings on MDN-420 special steel alloy . Cyclic oxidation testing conducted coated uncoated specimens at 700°C under a static air environment. Thermogravimetric analysis applied establish the kinetics. X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy-dispersive x-ray spectroscopy (EDS), p...