Materials Literature
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Abstract Y-doped alumina was sintered at 1500°C for 10 h under ultra-clean experimental conditions without experiencing any abnormal grain growth. The yttrium was fairly homogeneously distributed at the grain boundaries, with a mean value of Y = 5.5 at nm −2 . The Y–Al–O precipitates in the clean, Y 2 O 3 -doped alumi…
Due to their very high thermal conductivity carbon nanotubes have been found to be an excellent material for thermal management. Experiments have shown that the heaters coated with carbon nanotubes increase the heat transfer by as much as 60%. Also when nanotubes are used as filler materials in composites, they tend t…
The formation of notch-tip hydrides in CANDU® Zr-2.5Nb pressure tubes can significantly reduce their resistance to fracture, particularly during overload conditions. This paper outlines recent high energy X-ray diffraction measurements of notch tip strain fields in Zr-2.5Nb specimens, during both hydride growth and ov…
This study was an algal species diversity and taxonomic survey of WCA-2A and Big Cypress National Preserve (Florida, USA). 121 species were identified with 60 Cyanophyta, 57 Chlorophyta, 3 Euglenophyta, 1 Bacillariophyta and 1 unknown structure. This was the first report for 9 Cyanophyta and 2 Chlorophyta species from…
TiO2 deposition-methods are versatile and are expected to be more simple and easy, however, in recent years the industrial photocatalytic products have been developed enormously. In this work, photocatalytic TiO2 micro-particles are deposited using the atmospheric pressure plasma jet device. Here, deposition-method is…
理论分析了（1＋1）维呼吸子在向列相液晶中传输时的情况,通过对原始方程作归一化计算和相应的傅里叶变换,得到了特定情况下的强非局域非线性薛定谔方程,并且通过此方程最终求到了呼吸子解。在未作近似时可以计算出呼吸子的周期和最大（最小）束宽,在平衡点处将势函数近似展开到二阶,此时不仅得出了呼吸子解的周期和最大（最小）束宽,而且解出了波动振幅的解析解。通过数值模拟与解析解的比较,结果表明,解析结果成立于非局域程度较强的情况,并且未作近似的解析解始终比较接近模拟解。
The adhesion between zinc borate-containing rubber compounds and brass-plated steel cords was studied to understand the role of zinc borate as an adhesion promoter. No improvement in adhesion after cure was shown with loading of zinc borate in the range 0.5–2 phr, while enhancement of adhesion retention after humidity…
The effect of calcium, magnesium, strontium and barium ions on the electronic structure of m-nitrobenzoates was studied. The FT-IR spectra of m-nitrobenzoic acid and its salts were registered, assigned and analyzed. Characteristic shifts and changes in intensities of bands along the metal series were observed. The str…
To evaluate strength and service life of engineering objects, a model of a damaged medium consisting of three interconnected parts (relations determining the elastoplastic behavior of the material, kinetic equations of damage accumulation, and a strength criterion of the damaged material) is developed. In order to ass…
Ultraviolet (UV) irradiated tests with four kinds of fluence were carried out on PEEK films. After UV irradiation tests, tensile tests were conducted to clarify the effect of UV on mechanical properties. As a result, the UV fluence more than 8×10^2J/cm^2 decreased elongation at break of PEEK drastically. Surface obser…
A novel approach was developed to chemically tailor biodegradable aliphatic polyesters such as polylactic acid (PLA) and polybutylene succinate (PBS) for targeted applications. The reactive extrusion process utilized a catalyzed alcoholysis reaction to controllably cut the aliphatic polyester polymer chains to the des…
The Raman spectra of single crystal Ag β-alumina have been measured at room temperature. The interatomic potential was evaluated by a non-linear least square fitting between phonon eigenvalues from Raman and dynamical matrix calculation. Using the obtained pair-potentials, the MD simulation was performed. In order to…
The conventional synthesis of ferrite compounds consists of two-steps sintering processes. The first process is calcination to produce precursor of a desired ceramic object, and the second is to obtain the desired object.However, it was difficult to prepare X-type hexaferrite (Ba2Me2+2Fe28O46: Me2X, Me=Co, Ni, Cu, Zn)…
The microstructure of Ag thin films can be controlled by dispersing (LSGM) nanoparticles, and the Ag–LSGM–composite thin film serves as an excellent low operating temperature solid oxide fuel cells cathode. Here, the microstructure of Ag thin films can also be controlled by dispersing nanoparticles. By comparing the c…
Structural, electrical, and optical properties of nitrogen doped zinc oxide (ZnO:N) thin films deposited by direct current magnetron sputtering are analysed in this work. Nitrogen doping allows creation of p-type semiconducting ZnO thin films for their most important application as light emitting diodes. The scanning…
Molecular mechanics (MM) calculations to analyze the puckering of metalloporphyrins isolated and adsorpted on a graphite layer (0001) as a function of metal ion size and the peripheral substitution are presented. The Consistent Force Field (CFF) program was used with new parameters for metalloporphyrins, which include…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Subodh Srivastava, Sumit Kumar, Shweta Agrawal, Arpita Saxena, B. L. Choudhary, Shubhra Mathur, M…
Electrical conduction occurs and optical absorbance increases in a high resistive and transparent WO3 film with oxygen deficiencies. Both phenomena were caused by the generation of conduction electrons and electron transition from the valence band to the conduction band. Resistivity depends on the O2 flow rate of sput…
Boron-doped micro-nanocrystalline diamond coating may be successfully prepared on Mo substrate with DC arc plasmas jet deposition device. Along with the increase of doped-boron concentration in the film, two-point resistance measurement indicates that film resistance presents exponential decrease; Raman spectrum test…
Sorption of fission product vapors on metallic surfaces and dust particles is an important safety aspect of HTR reactors. Safety analyses of these reactors are performed using computer codes, such as MELCOR, RADAX, SPECTRA. These codes have sorption models allowing to compute the sorption rates of different fission pr…