Materials Literature
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Abstract The development of high‐temperature electrochemical devices such as solid oxide fuel cells, oxygen, and hydrogen separators and gas reformers poses a great challenge in brazing technology of metal/ceramic joints. To maintain the integrity of such equipment, the resulting seals have to be stable and hermetic d…
At present synchrotron and neutron sources are the preferred choice for PDF analysis, but there is clearly an increasing need for a PDF solution based on inhouse diffraction equipment. Such a solution, though limited, will benefit areas where quick feedback about the materials properties is important and will allow th…
The performance of the second-order spin-flip constricted variational density functional theory (SF-CV(2)-DFT) for the calculation of the exchange coupling constant (J) is assessed by application to a series of triply bridged Cu(II) dinuclear complexes. A comparison of the J values based on SF-CV(2)-DFT with those obt…
Pure and thiourea doped L-histidine (TU-LH) organic single crystals were grown by slow solvent evaporation method. Structural characterizations of the grown crystals were carried out by single crystal X-ray diffraction (XRD). The functional groups were identified by Fourier transform infrared (FTIR) spectroscopy. The…
We present careful experiments on the spin order and multiferroicity of Mn-deficient Ca3CoMn1−xO6 with respect to the Co/Mn compensated Ca3Co1+yMn1−yO6. It is revealed that a slight destruction of the Co/Mn ionic order does not damage but significantly enhances the ferroelectricity in terms of the transition point and…
Mixtures of 2-(4,5,6,7-tetrafluorobenzimidazol-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (F4BImNN) and 2-(benzimidazol-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (BImNN) crystallize as solid solutions (alloys) across a wide range of binary compositions. (F4BImNN)(x)(BImNN…
Formation of High-Density Dislocations and Hardening in Femtosecond-Laser-Shocked Silicon, Tsujino, Masashi, Sano, Tomokazu, Ogura, Tomo, Okoshi, Masayuki, Inoue, Narumi, Ozaki, Norimasa, Kodama, Ryosuke, Kobayashi, Kojiro F., Hirose, Akio
The aim of this work was to develop a new joining/repairing material suitable to be easily applied at temperature not exceeding 300°C, in air atmosphere, on large surfaces of SiC f /SiC composites for aerospace applications. The joining/repairing material proposed here is based on a Carbon Fiber‐reinforced commercial…
We report recent developments in the growth and characterization of epitaxial Bi(2)FeCrO(6) (BFCO) thin films. The body of experimental data stemming mostly from our investigations, and also considering the few available reports from other groups, allows us to explain the origin(s) of the thickness dependence of the m…
Abstract In situ PET microfibrils are created by drawing melt‐blended PP and PET. The drawn blend is used to prepare polymer/polymer MFCs, and isolated PET microfibrils are used for the manufacturing of MF‐SPCs. Samples are prepared with different fibril orientations to determine the effect of orientation on the mecha…
We report on chemical stability and corrosion behavior of highly depolymerized sulfophosphate glasses from the system ZnO – Na 2 O – SO 3 – P 2 O 5 in aqueous solution, providing data on weight loss, ion release rates, and modifications of surface topology as a function of time, temperature and pH value. Observations…
Abstract Substitution of the aromatic hydrogen atoms in the electron donors 1,2,4,5‐tetrakis(tetramethylguanidino)benzene ( 1a ) and 1,2,4,5‐tetrakis( N , N ′‐dimethyl‐ N , N ′‐ethyleneguanidino)benzene ( 1b ) by iodide (to give 2a and 2b ) and nitro groups (to give 3a and 3b ) afforded new redox‐active ligands. Their…
The catalytic properties of metal clusters and particles depend on their environment; however, little is known so far about the subnanometer metal particles, the smallest being single atoms, supported on metal oxide substrates, in particular, the systems that can be experimentally synthesized. Employing the first-prin…
Studying the structures of metal clusters on oxide supports is challenging due to their various structural possibilities. In the present work, a simple rule in which the number of Au atoms in different layers of Au(x) clusters is changed successively is used to systematically investigate the structures of Au(x) (x=1-1…
Accumulative back extrusion (ABE) is a recently developed severe plastic deformation process. In this article, the effects of deformation ratio (inner punch diameter/outer punch diameter) employed for ABE on the microstructure, grain size distribution, and Mg17Al12 phase precipitation in AZ91 magnesium alloys were inv…
Nanoparticles of the spinel ferrite Ni0.4Zn0.6Co0.1Fe1.9O4, have been synthesized by a co-precipitation method. The x-ray diffraction patterns of the particles confirmed the formation of single-phase cubic spinel structure. The Langevin function fitting on M-H data at 300 K gives a log-normal particle size distributio…
A metodologia da superfície de resposta (MSR) é uma coleção de técnicas estatísticas e matemáticas para desenvolver, melhorar e otimizar processos. Neste estudo, a técnica MSR foi aplicada na investigação do comportamento mecânico de diferentes misturas ternárias de PP/EPDM/SRT. Após a mistura apropriada em uma extrus…
Here, we report on the first example of crosslinking (CL) hyperbranched polyphenylene (hb-PPh) with a small molecule crosslinker 1,3,5-tris(azidomethyl)benzene (TAMB). It was successfully shown that CL of the hb-PPh/TAMB (9:1) film is possible either thermally or photochemically making use of fundamentally different r…
A novel and facile approach to manipulate the morphology of Cu(2+)-ion-specific assembly of conjugated polymer by coordinative interaction at an oil-water two-phase interface is present. The application of increasing importance is the use of π-conjugated polymers as receptors, exploiting their ability to selectively f…
A kind of azobenzene-based bent-shaped molecule is doped into a chiral nematic liquid crystal, so as to induce a 25°C blue phase range. As the sample is irradiated by 365 nm ultraviolet radiation, phase transitions from the blue phase to the chiral nematic, and then to the isotropic state are observed, because of the…