Materials Literature
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Abstract A multi-thickness target plate impact experimental technique is proposed in this paper and adopted in the research on the so-called failure wave phenomenon in soda-lime glasses, in which, four sub-targets in different thicknesses embedded in the target ring are impacted simultaneously and the longitudinal str…
In [1,2] an error (by a factor of 1000) in the diffusion rate of monomer in a photopolymer material used by the \nauthors of [3], is presented. In [3] no errors are identified in our analysis and our physical evidence is not addressed. \nIt is implied that our model and our results are disproven by the results in the…
Analytical studies of the effect of edge decoration on the energy spectrum of semi-infinite one-dimensional (1D) model and zigzag edged graphene (ZEG) are presented by means of transfer matrix method, in the frame of which the conditions for the existence of edge states are determined. For 1D model, the zero-energy su…
Three-dimensional (3D) urchin-like rutile TiO2 powders were synthesized by a mild hydrothermal method without any templates. An individual urchin-like TiO2 powder consists of self-assembled nanorods with a length of about 150 nm and width of about 10 nm. Additionally, the urchin-like TiO2 nanopowders were coated with…
This paper using high energy ball milling (HEM), researched has discussed the preparation of Al-CNT compound materials at the different milling times, rotary speeds, amount of CNT and sinter technology for their properties of hardness and density and for the preparation the Al-CNT. The milling time is about 30 to 100…
The photoelectrochemical properties of TiO2-based photoelectrodes with metal oxide overlayers (e.g., ZnO, ZrO2, MgO, and Al2O3) were investigated. The metal oxides were deposited on TiO2/tin-doped indium oxide (ITO) films by spin-coating metal-alkoxide precursors. The formation of the overlayers was confirmed by energ…
Nanostructured materials with diameters less than 100 nm have been studied vigorously in recent years. Many studies have been devoted on exceptional optical properties induced by quantum confinement for fundamental research and applications. For excellent luminescence characteristics, phosphor particles have to acquir…
Fe-1 wt% Y2O3 composite powders were mechanically alloyed for 12 hr and then heat-treated at 1050 degrees C for 1 hr. Positron annihilation lifetime and coincidence Doppler broadening measurements are in qualitative agreement with X-ray diffraction studies, indicating that in the as-mixed Fe-1Y2O3 composite, up to app…
We have grown a single-layer-thick porous gold film with pore size of ∼1 nm. The film is created by deposition of gold atoms onto a C 60 covered Au(111) surface. By controlling the sample temperature at 120–150 K, the deposited gold atoms are able to penetrate the molecular layer and reach the C 60 –Au(111) interface.…
Silicon quantum dot superlattice was fabricated by alternating deposition of silicon rich nitride (SRN) and Si3N4 layers using RF magnetron co-sputtering. Samples were then annealed at temperatures between 800 and 1,100 degrees C and characterized by grazing incident X-ray diffraction (GIXRD), transmission electron mi…
CO2 corrosion for rubber materials makes sealing failure of downwell tools and annulus pressure even, which will endanger the safety production of gas injection wells. The high-temperature high-pressure autoclave was used to test supercritical CO2 corrosion for dumbbell-shaped hydronibrile nitrile with pressure 35MPa,…
외경 1.02 mm, 내경 0.437 mm를 갖는 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 중공사를 상전이 방적기술로 제조하였다. 초기 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$ 선구 분말은 착체중합법을 이용하여 합성하였고, $900^{\circ}C$ 에서 하소하였다. 합성한 분말을 고분자 용액에 분산시킨 후 이중관형 노즐을 통해 중공사를 사출하였다. 최종적으로 산소분리에 사용 가능한 치밀 $Ba_{0.5}Sr_{0.5}Co_{0.8}Fe_{0.2}O_{3-{\delta}}$…
On the basis of the public data statistics of recent years on pollution and emissions from nuclear power plants (NPPs) and thermal power plants (TPPs) in the Russian Federation and the published investigation materials from Russian and foreign experts in this field, a comparative analysis of the radioactive emissions…
Abstract The filtered medial line operator is a methodological tool for the morphological and topological analysis of reconstructed samples exhibiting either a porosity network or a granular structure such as bead packs. An application example of this methodology is the evaluation of the pore structure and the derived…
Two types of dithia[3.3]metacyclophanes having cofacial bisporphyrins were prepared. The flexible cyclophane having C2 methylene units as the spacer exhibits the large stability constant (108M-1) for binding of 1,4-diazabicyclo[2.2.2]octane (DABCO). Similar large affinity for DABCO is also observed for the rigid cyclo…
Abstract Regarding the TiO 2 nano‐suspension under different influencing parameters such as hydrophilic chain length of the modified gemini surfactant (dispersant), electrolyte concentration and dispersant concentration, this study applied the Taguchi Method to analyze the optimal parameters of the TiO 2 nano‐suspensi…
Magnesium alloys are attracting increasing research interests due to their low density, high specific strength, good machinability and availability as compared to other structural materials. However, the deformation and failure mechanisms of nanocrystalline (nc) Mg alloys have not been well understood. In this work, t…
A new class of isomers, namely, intercage electron-transfer isomers, is reported for fluorinated double-cage molecular anion e(-)@C(20)F(18)(NH)(2)C(20)F(18) with C(20)F(18) cages: 1 with the excess electron inside the left cage, 2 with the excess electron inside both cages, and 3 with the excess electron inside the r…
The elastoplastic behavior of welded joints would seem to be the result of the joint actions of destruction and plastic-deformation processes. The possibility of modernizing the micromechanical model of acoustic emissions for the purpose of extending its application to the plastic-deformation segment is considered. An…
Based on Density Functional Theory (DFT) first-principles plane-wave ultra-soft pseudo-potential method, we calculated the electronic structure of wurtzite ZnO, Ag-doped ZnO and Ag-Al co-doped ZnO. And we anglicized of energy band structure, electron density of states of Ag-doped and Ag- Al co-doped ZnO crystal. The r…