Materials Literature
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Laser cladding using Al–30%Si alloy powder was applied to AZ91D alloy in order to improve its wear resistance. Area fractions of Mg2Si and Mg17Al12 compounds with relatively high hardness in the cladding layer with a width of 4 mm and a depth of 1.5 mm increase with an increase in powder feeding rate, resulting in hig…
Electronic structure of incipient ferroelectric CaTiO3 has been studied from the full potential linearized augmented plane wave method(FLAPW). To understand the incipient ferroelectricity of CaTiO3, the total energy, the density of states, and band structure have been obtained. From the total energy analysis, we found…
Order, order, order! Ferromagnetism and the Curie temperature were explained by Weiss in terms of a huge internal ‘molecular field’ proportional to the magnetization. The theory is applicable both to localized and delocalized electrons. No such magnetic field really exists, but it is a useful way of approximating the…
As a study in a series to investigate the effect of anodized coating on fatigue strength of aluminum alloys, repeated tensile fatigue test was conducted in laboratory air and at room temperature under the stress ratio of 0.01 using smooth plate specimen of A2014-T6 and A6151-T6 with anodized film thickness of 3μm. Fat…
In the process of growing crystals in solutions, double diffusive convection due to thermal and solutal gradients occurs. A measurement system comprising a rapid heat-transfer control system and an accurate real-time phase-shifting interferometer has been developed to investigate the transient double diffusive convect…
The phase diagram of Co-rich Sm-Co-Ti system was obtained by X-ray diffraction analysis and magnetic measurement. It was found that there exist three series of compounds, SmCo7-xTix, Sm2Co17-xTix and SmCo12-x Tix. The formation ranges for these three series are 0.32≤x≤0.54, 0≤x≤1.13 and 1.45≤x≤1.95, respectively. The…
The structure of a one-dimensional Al–Co–Ni quasicrystal in an Al71Co19Ni10 alloy annealed at 1100°C for 11 h has been studied by atomic-scale observations of high-angle annular detector scanning transmission electron microscopy and high-resolution transmission electron microscopy. Its structure can be characterized a…
The article is devoted to the method of calculation of an unsteady super-cavity. In the article, an analysis of calculation of an infinite cavity based on the energy principle is given, and a comparison of the calculation results with the classical results is performed. A new deduction of the law of expansion of the c…
Porous silicon membranes having 30 μm thickness, 1-2.5 mm side and nominal porosity in the range from 55 to 65% were formed in square localized areas of p + silicon and were investigated by multicrystal X-ray diffractometry, X-ray absorption, and X-ray synchrotron section topography. Preliminary results of this study…
The purpose of this paper was to obtain new hybrid composite materials (HCM) with applications in electromagnetic shielding and their characterization using new methods. The paper presents 6 experimental models (EM) of new hybrid composite materials (HCM) with applications in the electromagnetic shielding and their ch…
Mg-based hydrogen storage alloys are considered as a promising candidate for hydrogen system because of its lightweight, high storage capacity, low price and rich mineral resources. In detail,we reviewed the preparation and properties of Mg-Ni-based hydrogen storage alloys. All kinds of attempts have been done to impr…
For a user, the ideal hardfacing deposit is one that will resist all types of wear described earlier. In reality the formulation and selection of consumables is governed by the predominant wear mode and by the economic considerations. These factors have led to the development and availability of a large number of hard…
Potential ennoblement for stainless steel in natural seawater was analyzed. Open circuit potentials (OCPs) of platinum, gold, palladium, chromium, titanium and nickel ennobled in natural seawater as well as stainless steel, SUS 304 (18Cr-8Ni). Potential ennoblement is not a specific event to only stainless steel. Mari…
Starting from the achiral nematic phase composed of DL-serine hydrochloride decylester (DL-SDE), the change in density has been measured at 20°C as DL-SDE was stepwise replaced by the L-enantiomer. It was found that the density increased linearly with the replaced mole fraction of the L-isomer. The average difference…
Adding simply, in the classical capillary model, a constant line density of energy along the contact line leads to ill-posed equilibrium problems. Then, when line tension is present, the equilibrium configuration minimizes a different energy: the relaxedenergy, which explicitly depends on the presence of surface phase…
Abstract The 13 1/2 a 0 x 13 1/2 a 0 superstructure of 1T-TaSe 2 at room temperature has been studied by singel-crystal X-ray diffraction. The basic structure has symmetry P 3̅ m 1 with a 0 = 3.4733 Å and c 0 = 6.2715 Å. The superstructure has a pseudo hexagonal lattice, but it is triclinic with a 169-fold, 13 1/2 a 0…
Cs1-xSn1-xBi9+xSe15 and Cs1.5-3xBi9.5+xSe15 crystallize in a new structure type which does not belong to but is closely related to the members of the homologous series Am[M6-Se8]m[M5+nSe9+n]; the new phases reveal a third dimension of structural evolution for this series according to the formula Am[M1+lSe2+l]2m[M1 + 2…
Wrist watch size laptops and flat televisions screens based on LED film aren't yet in the shops -but they might be soon thanks to an 'accidental' scientific discovery 30 years ago.When
The quaternary scandium cuprate Ba3Cu3Sc4O12 has been prepared via the high temperature solid state reaction of the respective binary oxides and BaCO3 in air at 950 °C. The cuprate was characterised by powder X-ray diffraction (PXD) and its structure determined for the first time by Rietveld refinement of powder data.…
Cylindrical steel plates used for the thermochemical polishing of chemical vapor deposited (CVD) diamond films at elevated temperatures are investigated regarding their carbon content using X-ray and ion beam analysis. The surface distribution of carbon is investigated at randomly selected areas on two plates, one vir…