Materials Literature
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Internal combustion engines release 30~40% of the energy from fossil fuels into the atmosphere in the form of exhaust gases. By utilizing this waste heat, plenty of energy can be conserved in the auto industry. Thermoelectric generation is one way of transforming the energy from engine's exhaust gases into electricity…
BaTi 0.9 Zr 0.1 O 3– Ba 1-x Sr x TiO 3 fine-powders are synthesized by two-step liquid phase method. Phase analysis and microstructure evaluation conducted by X-ray diffraction and scanning electron microscopy confirm the perovskite structure of the ceramic grain. Different Sr content is considered to optimize the den…
Abstract The 1D polymer complex [Cu2(L)2(SCN)2]n (1) has been synthesised in a one‐step in situ reaction of picolinaldehyde with sodium thiocyanate. The complex 1 was characterised by FTIR spectroscopy, UV/Vis spectrophotometry and elemental analysis. The crystal structure of complex 1 shows that chains of dimer compl…
A novel 3D continuum shell structure is introduced as inclusion for composite materials with special mechanical properties in this paper. Its geometry is based on a hollow re-entrant tetrahedron. In a composite, such an inclusion can demonstrate a closure effect induced by external compression. Its specific deformatio…
Columbian coffee trees are subject to frequent replacement plantings due to disease and local climate changes, which makes them an ideal source of wood fibers for wood plastic composites (WPC). Composites of polypropylene (PP) consisting of 25% and 40% by weight of coffee wood flour (CF) and 0% or 5% by weight of male…
This paper explores the possibility that flexible fibres of different lengths substitute for sheath to fulfil brush plating from the perspective of optimising solution carrier. SEM, EDS, XRD, TEM, microhardness tester are respectively adopted to study the effects of fibre length on coatings’ morphology, structure and…
Abstract A monoamide‐linked monozinc bisporphyrinate for monodentate chiral guests was designed and synthesized. It was used as a host to complex with amino acid esters; the resulting CD spectra showed typical bisignate shape, which suggest the ability to transfer chirality from amino acid esters. The molecular struct…
A stochastic initiation and propagation model is developed to predict the effects of pitting corrosion on susceptible metals.The model relies upon an inhomogeneous Markov chain system in order to describe the propagation of pit depths throughout a discretized set of states.This work mainly examines the flexibility of…
Pitting corrosion is a localized corrosion that leads to potential damage to metal structures.The goal of this work is to provide a model for pitting corrosion risk management.The process of pitting corrosion is considered as a combination of pit initiation and pit depth growth.For the pit initiation, a Poisson proces…
Effect of aging on the mechanical properties of cold worked Al–6Mg alloy with minor additions of scandium is studied. Cast and mechanically worked samples are isochronally aged for 60 min at different temperatures up to 500°C. Evaluation of mechanical properties of the aged alloys is done at various strain rates of te…
Viscoelasticity of bone has been of interest for many years because this time-dependent mechanical property relates to the fracture risk of bone under dynamic loading. Several factors have been claimed to contribute to this property including the nature of different constituents of bone and their interactions, as well…
Abstract A novel method for fabricating a miniaturized ionic polymer–metal composite (IPMC) with plated gold electrodes is developed by combining selective plasma irradiation and electroless plating. The membrane is irradiated by SF6 or CF4 plasmas through a stencil mask prior to plating to prevent deposition of a gol…
Oxidation method was used to prepare nanostructure of cupric oxide (CuO) film. Thin film of Copper metal were deposited on substrate (quartz) in a thermal vacuum evaporator. The thickness of the film was measured to about 20 µm. The thermal oxidation of this evaporated film was done in a horizontally heated quartz fur…
Partial strain relaxation effects on polarization ratio of semipolar (112̄2) InxGa1−xN/GaN quantum well (QW) structures grown on relaxed InGaN buffers were investigated using the multiband effective-mass theory. The absolute value of the polarization ratio gradually decreases with increasing In composition in InGaN bu…
Powłoki ceramiczne na bazie tlenku cyrkonu stabilizowanego tlenkiem itru (Y2O3) są stosowane głównie jako bariery cieplne na powierzchniach elementów narażonych na działanie bardzo wysokich temperatur, m.in. łopatek turbin gazowych. Przeprowadzone badania pre- zentują możliwości wytworzenia omawianych powłok z użyciem…
Adding poor solvent for polymer in the polymer solution will lead to shift in solubility and eventually phase separation, which refers to the solvent-shifting process.During this process it has been observed that relatively uniform size of polymer particles are formed.The formation of these polymeric nanoparticles hav…
In this work, Al 2 O 3 -Y 3 Al 5 O 12 ceramic composites were developed with different proportions of Al 2 O 3 -Y 2 O 3 , which were mixed and compacted at different pressures of 40MPa to 100MPa, being consequently sintered at 160°C-2h. The sintered samples were characterized by X-ray diffraction presenting a-Al 2 O 3…
The title compound, dirubidium dimanganese(II) tris-(tetra-oxo-molyb-date), Rb2Mn2(MoO4)3, was prepared by solid-state reactions. The structure can be described as being composed of MnO6 octa-hedra sharing corners with MoO4 tetra-hedra. The three-dimensional framework contains cavities in which the rubidium ions are l…
Polishing-induced redeposition layer of fused silica optics seriously limits the laser damage resistance, and currently the focus of research lies in absorbing impurities. This article focuses on structure characterization of fused silica redeposition layer in nanoscale and analysis of impurities. With atomic force mi…
In asynchronous sampling, discrete Fourier transform (DFT) spectrum involves errors. Scholars have done great investigations on the correction techniques of DFT spectrum, but the errors have not been completely eliminated all along. In this paper, spectrums were examined from the principle of conservation of energy. I…