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。
Some theoretical and practical aspects of the application of transmission microdiffraction (µXRD) to thin sections (≤30 µm thickness) of samples fixed or deposited on substrates are discussed. The principal characteristic of this technique is that the analysed micro-sized region of the thin section is illuminated thro…
The recent problem of estimating the residual life of metal structures for handling equipment is actual, since more than 90% exhausted its regulatory resources. The current paper proposes an approach to solve this problem by using the coercive force. It is shown that in order to determinate damage of dangerous element…
The intrinsic reactivity of the organoruthenium-grafted tungstophosphates [α-PW 11 O 39 {Ru(η 6 -arene)(H 2 O)}] 5− and [α-PW 11 O 39 {Ru(DM S O) 3 (H 2 O)}] 5− has been studied as a prerequisite for later catalytic studies. Upon reflux in aqueous solution, they partially transform into [{PW 11 O 39 Ru(η 6 -arene)} 2…
Endothermic steam reforming of methane for hydrogen production requires heat input with selective oxidation of methane. Dense SrCe 0.75 Zr 0.20 Tm 0.05 O 3-δ perovskite membranes were combined with a reforming catalyst to demonstrate the feasibility of a heat-exchange membrane reactor for steam reforming of methane co…
Abstract Polymer matrix composites are generally studied in the form of bulk solids, and very few works have examined composite fibers. The research described here extended such bulk studies to fibers. The question is whether or not what has been reported for bulk polymers will be the same in fibers. In this article a…
We report on the near‐edge X‐ray absorption fine structure spectroscopy of the L 3 (2p 3/2 ) and L 2 (2p 1/2 ) edges for ferromagnetic pure nickel transition metal and show that the L 2,3 edge peak intensity and satellite feature at ~6 eV above the L 3 edge in nickel increase with increasing nickel film thickness both…
MoS 2 nanotube bundles, along with embedded nested fullerenes, were formed in a gas-phase reaction of molybdenum carbonyl and H 2 S gas with the assistance of I 2 . The amorphous Mo-S-I precursor particles obtained by quenching a modified metal organic chemical vapor deposition (MOCVD) reaction in a large temperature…
A series of layered oxides of nominal composition SrFe(1-x)Mn(x)O(2) (x = 0, 0.1, 0.2, 0.3) have been prepared by the reduction of three-dimensional perovskites SrFe(1-x)Mn(x)O(3-δ) with CaH(2) under mild temperature conditions of 583 K for 2 days. The samples with x = 0, 0.1, and 0.2 exhibit an infinite-layer crystal…
High-quality Ca0.8Dy0.2MnO3 nano-powders were synthesized by the solution combustion process. The size of the synthesized Ca0.8Dy0.2MnO3 powders was approximately 23 nm. The green pellets were sintered at 1150-1300°C at a step size of 50°C. Sintered Ca0.8Dy0.2MnO3 bodies crystallized in the perovskite structure with a…
The plasma powder transferred arc welding process which uses feed stock in a powder form has similarities with plasma wire transferred arc welding. This paper describes a comparative study of the two processes using a cobalt-based alloy commercially known as stellite 6. This Co-based alloy is recognized for its superi…
We describe a novel type of electromagnetic cloak designed to conceal an object in a corner, and demonstrate its excellent performance by employing direct numerical simulation. Furthermore, we study the angular dependence and the effect of loss on the invisibility performance and compare ideal and simplified cloaks. T…
Abstract In this study, compatibilizing ability of silicone carbide modified multiwalled carbon nanotube (MWCNT) and polyphosphazene for the incompatible polyetherimide/liquid crystalline polymer (LCP) blend was investigated in detail. From rheological study, it was evident that the viscosities of binary and ternary b…
Abstract The degree of silane grafting and cross‐linking of several high‐density polyethylenes (HDPE) was studied. The results are compared with those of a low‐density polyethylene (LDPE) and a linear low‐density polyethylene (LLDPE). Molecular characterization was done by gel permeation chromatography. The difference…
We apply electronic structure methods based on hybrid-exchange DFT functionals under periodic boundary conditions to study the catalytic aerobic oxidation of hydrocarbons in Mn-doped aluminophosphates. In particular, we focus on the mechanism of the propagation reactions. Hydrocarbon oxidation is achieved via a succes…
Electronic structure methods based on periodic DFT with hybrid-exchange functionals are applied to study the reaction mechanism of the aerobic oxidation of hydrocarbons catalyzed by Mn-doped nanoporous aluminophosphates. Here, we focus on the regeneration of the active sites that closes the oxidation cycle. At this st…
Two-photon excitation profiles and fluorescence spectra have been measured as a function of pressure in a diamond anvil cell up to 15.5 GPa in crystal phases I and II and in the glassy form of pyridine. The fluorescence emission intensity increases by about 6 orders of magnitude in going from the liquid to the crystal…
Abstract A series of copolymers containing ε‐caprolactone (CL) and 4‐methyl‐ε‐caprolactone (MeCL) were synthesized by ring‐opening polymerization (ROP) using Tin(II) bis(2‐ethylhexanoate)(Sn(Oct) 2 ) or Novozym 435 as catalyst. The molecular structure and weight of copolymers were determined by nuclear magnetic resona…
Ionic liquids that dissolve cellulose provide an option to pretreat lignocellulosic biomass. In this study, potential application of three ionic liquids in pretreating rice husk and their abilities in dissolving rice husk cellulose were investigated. The ionic liquids applied were 1-butyl-3-methylimidazolium chloride…
Abstract This article presents foaming behaviors and cellular structures of poly(lactic acid) (PLA)‐clay nanocomposite and respective neat PLA foams using CO 2 as a foaming agent. The effects of nanoclay and foaming conditions on the foam morphology and mechanical properties of neat (PLA) and PLA‐clay nanocomposites h…
We report the results of first-principles molecular dynamics simulations for liquid and undercooled eutectic Au${}_{72}$Ge${}_{28}$ alloys at various temperatures. In comparison with the parent Au${}_{81}$Si${}_{19}$ liquid, we find a much less pronounced chemical short-range order in Au${}_{72}$Ge${}_{28}$, mainly du…