Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The electrochemical impedance of copper in benzotriazole (BTAH)-inhibited media is affected by the addition of sulfides. The caused order of magnitude decreases in the polarization resistance and increases in the double layer capacity. The appearance of sulfur peaks in the X-ray photoelectron spectroscopy (XPS) spectr…
Interaction between photocreated carriers and background excess-electrons in single-crystalline Al-doped ZnO epilayers (1.9 × 1019 ≤ n ≤ 6.7 × 1020 cm—3) are studied by using optical absorption spectroscopy. The Burstein Moss shift of the absorption edge energy over the carrier concentration range of n ≥ 5.9 × 1020 cm…
The effect of dissolved carbon dioxide on steel corrosion in aerated solutions has been variously reported, ranging from "no effect" to "catalytic enhancement of corrosion." A corrosion model was developed, verified with published experimental data, and then used to interpret the role of carbon dioxide in the presence…
Actinide dioxides (ThO 2 , UO 2 , Pu 2 etc.) compounds have the CaF 2 -type structure at ambient pressure and temperature. Under high pressure, they exist in the PbCl 2 -type structure, belonging to space group Pnma [1]. We have studied crystal structures under high pressure in actinide dioxides by means of first-prin…
The removal of the carbon from Nd magnet scraps is indispensable for high-quality recycling by the induction melting method as a preliminary process. The Nd magnet scraps can be decarburized to a level of less than 0.03 mass% by using an oxygen source at high temperatures, as reported in Part 1. The decarburized Nd ma…
Tensile properties of heat-treated hemp and bamboo fibers were examined. The average tensile strengths of hemp and bamboo fibers without heat treatment are 863MPa and 516MPa, respectively. After heat treatment at 200°C for 7.2ks, both fibers show a 60 percent decrease in tensile strength. The tensile strength of hemp…
Results on the oxygen permeability and stability of perovskite-type La 0.6 Sr 0.4 Co 0.8 Fe 0.2 O 3 (LSCF) coated with ( Sm 2 O 3 ) 0.1 ( CeO 2 ) 0.9 (SDC) are presented. Bilayer structures were formed by depositing a thin layer of SDC by pulsed laser deposition (PLD) on the reducing side of the membrane. Oxygen perme…
Hysteresis in smart materials hinders wider applicability of such materials in actuators and sensors. In this dissertation we study modeling, identification and control of hysteresis in smart actuators. While the approaches are applicable to control of a wide class of smart actuators, we illustrate the ideas through t…
Kenaf (Hibiscus cannabinus L., Malvaceae) is a warm season annual fiber crop closely related to cotton (Gossypium hirsutum L., Malvaceae) and okra (Abelmoschus esculentus L., Malvaceae) that can be success-fully produced in a large portion of the United States, particularly in the southern states. As the commercial us…
A thermodynamic analysis of the dry etching process for copper using halides is undertaken with the development of volatility diagrams. The construction of such diagrams for the Cu-Cl system is illustrated for temperatures ranging from 50 to 200°C. The copper condensed phase species and the partial pressures of the pr…
Effects of cation-site vacancies on the characteristics of the cubic–tetragonal displacive transitions in La-modified PbTiO3 (PLT) were studied using in situ XRD measurements and Raman scattering. For this purpose, two distinct types of PLT series having cation-site vacancies either at the A site (PLT-A) or at the B s…
The effects of cross-linking and crystallinity on the aging of plasma-treated high-density polyethylene (HDPE) have been investigated. In the case of mixed argon and oxygen, aging has been found to be reduced with an increased amount of argon in the mixture owing to an increased degree of cross-linking. A similar decr…
Linear pi-conjugation is reversibly re-routed by irradiation of a photochromic bis(terthiophene).
Grain refining mechanisms of Fe- and Mn-free high-purity Mg–Al alloy ingots and the influence of a small addition of Fe or Mn on their cast structures are investigated. In order to prepare the alloys, distilled pure magnesium (<99.99%) and commercial high-purity aluminum (99.99%) were melted, and given amounts of Fe a…
Hydrophobic CaCO3 composite particles were prepared via crystallization of CaCO3with a sodium trisilanolate [(c-C5H9)7Si7O9(ONa)3] in methanol. The molar ratio of calcium ion to the sodium trisilanolate was varied from 0.1 to 0.5. FT-IR and TGA analysis of the obtained product indicated that the trisilanol was bound t…
Singlet oxygen-initiated decomposition of urocanic acid (UCA) (3-(1H-imidazol-4(5)-yl)-2-propenoic acid) was used to successfully confirm the report that UCA generates singlet oxygen when irradiated with ultraviolet A light (UVA). The UCA-generated singlet oxygen converts UCA to one or more products that then catalyze…
New transparent surface crystallized glasses in the system of Sm2O3-Bi2O3-B2O3 have been successfully fabricated. The second harmonic generation (SHG) from the crystalline phase at the surface layers has been confirmed from Maker fringe measurements. The irradiation of CW YAG laser with a wavelength of 1064 nm induces…
As part of a program to determine how small structural changes become manifest in the optical properties of crystals we used classical dipole–dipole interaction calculations to estimate the linear birefringence and optical rotatory power of the crystals Ph4X where X = C, Si, Ge, Sn, and Pb. Field induced effects inclu…
A giant enhancement (no less than by 10 3 ) of the optical third-harmonic generation in one-dimensional porous silicon microcavities and photonic crystals was observed experimentally. The enhancement is due to the resonant enhancement of the fundamental field in the cavity mode and the fulfillment of the phase matchin…
The technique of bead injection has been adapted for surface enhanced Raman scattering (SERS) to substantially improve precision, long term stability and sensitivity of SERS detection in analytical chemistry. For this purpose a fully automated flow system comprising a dedicated flow-cell has been developed and tested.…