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。
"We describe an experimental method by which site-specific valence-electronic structure may be obtained. Itutilizes the spatial dependence of the electric-field intensity that results from the superposition of the incidentand reflected x-ray beams within the vicinity of a crystal x-ray Bragg reflection. Resolution of…
Studies on shock response of circular plates subjected to underwater explosion is of interest to ship designers. Non‐contact underwater explosion experiments were carried out on air backed circular High Strength Low Alloy (HSLA) steel plates of 4 mm thickness and 290 mm diameter. The experiments were carried out in tw…
(Pro-Pro-Gly)(10) is one of the most widely studied collagen polypeptide models. Microgravity crystal growth of (Pro-Pro-Gly)(10) was carried out in the Advanced Protein Crystallization Facility aboard the Space Shuttle Discovery during the STS-95 mission. Crystals were successfully grown in all experiments, using bot…
Ethylene-propylene-diene elastomer (EPDM), which is grafted with an isocyanate-containing monomer (HI), was blended with polyethyleneterephthalate (PET) and its morphological, thermal, rheological, and mechanical properties were studied. HI was incorporated onto EPDM backbone through a solution graft reaction. When th…
Assemblies of short CdS nanofibers/poly(styrene-alt-maleic anhydride) were prepared via a one-pot procedure in anhydrous ethanol for the first time by γ-irradiation under ambient conditions. The as-prepared copolymer matrix can successfully control the morphology of nanocrystalline CdS and prevent aggregation. Carbon…
This paper demonstrates that measurements on well-defined ‘dots’ of a material on a substrate provide a useful experimental approach for determining the area of a specimen that contributes to a small-area XPS measurement. The method provides information that can verify instrument operation conditions and the adequacy…
A LiAl2(OH)6+ intercalated montmorillonite was prepared from a montmorillonite by using a hydrothermal soft chemical process. As a first step, lithium aluminium hydroxide complex ions (LixAln(OH)mz+) were inserted into the interlayer space of the montmorillonite by an ion-exchange reaction. In the second step, the ion…
Dynamic differential scanning calorimetry (DSC) using paper samples of different compositions has evidenced varying degrees of endothermic activity prior to the exothermic, oxidative decomposition of cellulose under static air. Whereas cotton cellulose papers displayed a significant endothermic activity, wood-pulp pap…
The formation of scale on heat transfer surfaces in cooling water systems is a frequent engineering problem. The present paper deals with the scaling process of calcium carbonate on a copper modified heat transfer surface with low surface energy—electroless plating (ELP) surface. The induction period of calcium carbon…
The present paper discusses the theoretical modelling of liquid impact damage thresholds as a result of spatial and temporal distributions of transient stresses in elastically deformable brittle materials. The model predicts changes in the response characteristics of brittle materials owing to an idealised representat…
The electrochemical response of a conducting polymer, poly(vinylferrocene) (PVF), as a function of the electrolyte media, is reported. Cyclic voltammetry has been used to investigate the redox behaviour of the films spin-cast onto glass electrodes (ITO). The films were cycled in non-aqueous (propylene carbonate and te…
A new image contrast is reported for LSIs covered with an insulator film in a low accelerating voltage scanning electron microscope. The surface region above the conducting lines is often observed brighter than that without conducting lines. This contrast is quasi-stationarily observed contrary to well-known capacitiv…
The responses of symmetric square and triangular wave pulses have been investigated in planar cells of two ferroelectric liquid crystalline mixtures FLC-6430 and SCE-13 in the SmC*phase. The samples were sandwiched between two parallel polyimide coated substrates. The cells containing SCE-13 and FLC-6430 were consider…
Powder neutron diffraction measurements were performed on an antiferromagnetic manganese sulfide BaLa2MnS5 at 7 and 100 K. This sulfide has a tetragonal nuclear structure with space group I/mcm. The neutron diffraction data at 7 K show a collinear antiferromagnetic structure (space group I) with a propagation vector k…
A simple porous silicon texturing technique that is applicable to various kinds of silicon material, including multicrystalline and ribbon Si, of any doping type and level is used to fabricate solar cells. Acidic etching of Si leads to a homogeneous porous silicon (PS) surface layer with reflectance as low as 9%. Phos…
Styrene and maleic anhydride (MAn) were successfully grafted, alone and simultaneously, onto various model hydrocarbon substrates at 180 °C with 2,5-dimethyl-2,5-di-(t-butyl peroxy)hexane (L101) as a free-radical initiator. Dodecane, 1-dodecene, and 2,6,10,14-tetramethylpentadecane were selected as model compounds to…
An analytical technique is developed for predicting the performance of a bonded Halbach oriented anisotropic magnet, with due account of partial alignment of the NdFeB powder during injection molding. The predicted performance of a 12-pole injection molded, Halbach oriented magnet is compared with measurement.
In succession to our work on aluminium films a systematic database of thin-film measurements on palladium films by electron probe microanalysis is presented. This time the measurements were performed at accelerating voltages between 4 and 30 kV, again on films of six different nominal thicknesses, ranging from 100 to…
β‐aluminas were successfully synthesized by direct solid‐phase reaction. Contrary to other β‐aluminas. Srβ‐alumina doped with showed two strong phosphorescent peaks at 482 and 502 nm, which were different from the peak of fluorescence (465 nm). These phosphorescent peaks were dependent on the excitation wavelength. Th…
Careful hydrolysis of a pentacoordinate chlorosilane gives a pentacoordinate protonated silanol that resembles the intermediate in the aqueous hydrolysis of silanes.