Materials Literature
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On the base of electromagnetic theory of gratings, we analyse the effects of both of two important parameters of classical blaze grating in Littrow mount to diffraction efficiency, and the two parameters are optimized for obtaining highest diffraction efficiency. It is presented that not only blaze angle but apex angl…
The continuous ECAP process which can provide three-dimensional strain was developed in this study. A die with tri-axis crossed channels having channel angle of 90 and curvature of 0 was created. As a result, continuous ECAP process via route Bc for AC4CH aluminium semi-solid alloy could be performed at 573K at pressi…
Coupling agent γ-methacryloxypropyltrimethoxysilane（KH-570） was used as modifier to improve the superficial capacity of coal powder. Modified coal powder/thermoplastic butadiene-styrene rubber (SBS) composites were prepared by mixing procedure. The modified and unmodified coal powder and mechanical properties of compo…
The thermal barrier coatings (TBC) of the yttria-stabilized zirconia (YSZ) has been deposited by the atmospheric plasma spraying (APS),followed by the irradiation of high intensity pulsed ion beam (HIPIB) with the voltage of 250 KV and the ion current density of 300 A/cm2 and pulsed times of 2, 5, 10 and 20, respectiv…
Nickel-cobalt alloys have broad application prospect for their excellent properties (i.e. high microhardness, strength, abrasion, corrosion resistance and magnetic properties.etc). Present situation and new trends on mechanism of the anomalous codeposition and technology of electrodepostion of nickel-cobalt were studi…
Nur eine Illusion: Oberhalb einer kritischen Kettenlänge, bei Oligomeren mit fünf oder mehr Erkennungseinheiten, werden im Festkörper scheinbar endlose Donor-Akzeptor-Polypseudorotaxane gebildet (siehe Bild). Röntgenstrukturanalysen dreier Kristalle zeigen, dass die oligomeren Ketten zwar eindeutig diskret und monodis…
The asymmetric unit of the title compound consists of two crystallographically independent, but structurally identical, [HP(2)Mo(5)O(23)](5-) anions, ten guanidinium cations and five water molecules. Each singly protonated diphosphopentamolybdate(VI) anion retains the typical geometry of a ring of five edge-sharing Mo…
Ti-6Al-7Nb titanium alloy is attractive to medical device industry for orthopedic applications, such as total hip replacement systems, fracture fixation plates, intermedullary rods and nails, spinal devices, screws, and wires. Substituting Niobium for Vanadium as the beta stabilizing element, Ti-6Al-7Nb titanium alloy…
This study presents a theoretical throughput analysis of two buffered-crossbar switches, called shared-memory crosspoint buffered (SMCB) switches, in which crosspoint buffers are shared by two or more inputs. In one of the switches, the shared-crosspoint buffers are dynamically partitioned and assigned to the sharing…
Cool runnings: Upon cooling the monohydrate of the anti-inflammatory drug piroxicam shows reversible splitting (see picture). The cell also shows an irregular contraction over temperature and has a memory effect of its thermal history. This is due to strongly hydrogen bonded chains present in the monohydrate, which al…
Silicon carbide (SiC) power devices have received much attention in recent years because they enable the fabrication of devices with low power consumption. To reduce the on-resistance in vertical power transistors, back-side thinning is required after device processing. However, it is difficult to thin a SiC wafer wit…
The experiment focused on the contrast with rock breaking effect of impacting water jet by modulation of chaos and common cavitation jet. Investigated the influences of various water jet parameters and conditions on rock breaking, such as standoff distance, pump pressure, transverse speed and erosion time and the mass…
This paper presents the first results in a series of research efforts aiming to perform numerical modelling of the electromagnetic gun RAFIRA (RApid FIre RAilgun) of the French-German Research Institute of Saint-Louis (ISL). It deals with the understanding and the illustration of cross-sectional deformation behaviour.…
A radical B12 synthesis: A recently described blue 7,8-secocorrinoid, a degradation product of vitamin B12, has a remarkable structural predisposition for ring closure. Reductive reconstitution of the corrin macrocycle by means of a stereospecific radical reaction leads to a 7-epicobalamin. Human B12-binding proteins…
Piezoelectric materials because their special ability to convert bwteen kinetic energy and electrical energy. Therefore, they are widely applicated in the areas such as sensors, resonators etc. However, the electrical degradation phenomenon of piezoelectric materials will cause the degradation of their performance. Th…
Al2O3/epoxy resin composite materials were prepared with alumina as filler in this paper, and the effects of particle size and added quantity of Al2O3 powers on the thermal conductivity of the composites have been investigated. The results show that, thermal conductivity of the composites increases with the increase o…
Star polymers of sodium styrenesulfonate with controlled arm length were prepared in a one-pot polymerization. Sodium styrenesulfonate was first polymerized with controlled molecular weight and narrow polydispersity by stable free radical polymerization. Poly(sodium styrenesulfonate) was terminated with divinyl benzen…
Ultraviolet (UV) curable waterborne polyurethane(WPU) dispersions based on isophorone diisocyanate(IPDI), polypropylene glycol(PPG), dimethylolproprionic acid(DMPA) and pentaerythritol triacrylate(PETA) were prepared by the conventional method of anionic aqueous polyurethane dispersions. The structure of the ultraviol…
Two high boron alloyed stainless steel composite plates(HBASSCP) which have different Cr and Ni contents were prepared by composite casting and hot rolling process. By means of metallographic observation and x-ray diffraction analysis, the matrix microstructure of calding and core is ferrite and the boride phase in co…
A series of hydrophilic copolyesters were prepared via copolymerization method with purified terephthalic acid (PTA), ethylene glycol (EG), 5-sodium suflo bis-(hydroxyethyl) isophthalate (SIPE) as the third monomer, and different content of polyols (FMA01) as the fourth monomer. The chemical structures of the hydrophi…