Materials Literature
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Bulk nanocrystalline Fe3Al based materials with 5, 10 and 15 wt. % Cu were prepared by aluminothermic reaction in which the melts were superheated about 1600 K before solidification. Microstructures of those materials were investigated by optical microscope, electron probe microanalysis, X-ray diffraction and transmis…
Calcium sulphate is rich in natural resources and by-product of many industrial processes. However, most calcium sulphate product was only used with low added value or treated as waste, harmful to environment. If the calcium sulphate can be used as papermaking filler, very high added value can be gained and also the e…
New composite foams were prepared by using Melamine-Urea-Formaldehyde (MUF) resin and wood pulp fiber as raw materials with co-foaming method at 70°C in the opening mould. The study of the composites foam microstructure showed good adhesion between MUF matrix foam and wood pulp fiber. The flame-retardant, mechanical,…
SBA-15 nanoparticles were prepared by in situ assembly of inorganic precursors and CTAB. The structure of nanoparticles was characterized by X-ray diffraction, transmission electron microscopy, particle size analysis, and N2 adsorption techniques. The surface modification of particles in order to perfect dispersion in…
This is the first study of the NaBO 2 -Na 2 CO 3 -Na 2 MoO 4 -Na 2 WO 4 quaternary system by differential thermal analysis. Na 2 [MoO 4( x ) WO 4(1 − x ) ] solid solutions in the quaternary system are found to not decompose.
A unique hybrid borotungstate, [Cu(En)(Phen)(H 2 O)] 4 [α-BW 12 O 40 ]{[Cu(En)(Phen)] 2 [Cu(En) 2 · (H 2 O)] 2 [Cu(En)(Phen)(H 2 O)] 2 [α-BW 12 O 40 ] 3 ]} sd 10H 2 O ( I ) (Phen = 1,10-phenanthroline, En = ethylenediamine), has been hydrothermally synthesized and characterized by elemental analyses, IR, and UV spectr…
The structural change of an YbInCu4 single crystal has been investigated associated with the first-order valence-transition at T V = 42 K using synchrotron radiation diffraction. The Yb–Cu and In–Cu interatomic distances abruptly increase below T V, following the lattice expansion with no change in the C15b-type cryst…
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A Lower Hybrid Current Drive (LHCD) system has been implemented on Alcator C-Mod with successful coupling to the plasma of up to 1 MW of power.Nearly fully non-inductive current drive has been achieved for several current relaxation times at low but ITER-relevant densities.One major advantageous feature of the C-Mod L…
Void growth in wire bonds significantly influences the reliability of electronic devices. This paper found that, in the as-bonded state, a few voids nucleate in Au-Al bonds, while they are absent in Cu-Al bonds. Voids grow much faster in Au-Al bonds than in Cu-Al bonds during thermal annealing. It is proposed that voi…
Experiments were performed to investigate the properties of fly ash-calcined phosphogypsum (PG) cementitous materials with PG different thermally treated, including being calcined at 135°C, 430°C and 800°C separately. Durability of the cementitous materials was investigated by determination of mass loss of binders imm…
Foam has been widely used in petroleum industry. It could enhance oil recovery by the means of improving mobility ratio, selective plugging and lowering the interfacial tension(IFT) of oil and water. The influences of concentration, temperature, gas-liquid ratio, permeability and oil saturation on the plugging propert…
SiC whiskers were prepared through carbonthermal reduction in two steps. Firstly raw rice husks (RHs) were pyrolysed in a graphite vacuum furnace at 460°C for 2 hours and coked rice husks were pyrolysed at 1400°C in argon atmosphere. Scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron mi…
The binuclear copper(II) complexes with acyldihydrazones formed by 1,4-cyclohexanedicarboxylic acid and salicylaldehyde or 2-hydroxyacetophenone were synthesized and studied. The structure of the complex with 1,4-cyclohexanedicarboxylic acid bis(salicylidene)hydrazone (H4L1) [Cu2L1(Py)2] was studied by X-ray diffracti…
4,5-Dichloro-1,2-dithiole-3-thione was found to undergo 1,3-dipolar cycloaddition reactions with internal and terminal alkynes. The combination of these reactions together with new transformations afforded versatile heterocyclic systems including 1,3-dithioles, imino-1,3-dithietanes, 2-iminothiophen-3-ones, thienothio…
This paper presents the effect of Bi doping concentration and annealing temperature on structural and optical properties of zinc oxide thin films. The samples in this study were prepared by sol-gel technique. These thin films were characterized by X-ray diffractometer technique. XRD analysis revealed that the Bi-doped…
Nanocrystalline (NC) copper is fabricated by the method of severe plastic deformation of coarse-grained copper under explosive dynamic loading at high strain rates. The dynamic mechanical properties of NC copper are studied by the split Hopkinson pressure bar method. The results show that it is feasible to fabricate n…
The term of “Power Quality” is used to describe the electromagnetic phenomenon in variations of voltage and current in the power system. Most power quality disturbances can come from the facility itself, such as large loads turning on simultaneously, improper wiring and grounding practices, the start-up of large motor…
In order to determine the optimal proportion of magnesium phosphate cement mortar, the influences of ratio of magnesium phosphate cement-based binder (MPB) to sand (MPB/S), effects of fly ash on fluidity and strength development of MPB mortar, and the compatibility between MPB and traditional concrete and shrinkage of…
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