Materials Literature
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The heat treatment was carried out to modify the aramid fibers, and the effect of tension on the mechanical properties and structure was investigated through Fiber Strength Equipment, viscosity, XRD and SEM . The results show that fibers，strength slightly decrease, but modulus increase significantly according to the i…
In this study, a 1350oC-sintered 98 mol% ZnO-1 mol% Al2O3 (AZO, Zn:Al= 98:2) ceramic was used as a target and deposited on glass using a r.f. magnetron sputtering system at a deposition temperature of 200°C. The effects of different H2 flow rates (H2/(H2+Ar)=0% ~ 9.09%, abbreviated as H2-deposited AZO films) added dur…
In this investigation, the bioleaching of potassium, silicon and aluminum from natural illite by three strains ofPaenibacillus polymyxa,Agrobacterium tumefaciensandPenicillium heteromorphumpurchased from China General Microbiological Culture Collection Center was studied. Chemical analyzing investigation indicated tha…
In this paper, fine-denier silkworm was fostered from the Qing Song silkworm, and their raw silk was made to 23.3dtex fine-denier raw silk and normal ones respectively, and their moisture absorption and quality such as cross section, fineness and mechanical properties were studied. The results showed that the cross se…
40CrNi2Si2MoVA high-strength steel is widely used in aircraft industry because of its unique combination of ultrahigh strength with high fracture toughness. However, 40CrNi2Si2MoVA is vulnerable to both corrosion fatigue and stress corrosion cracking failures with catastrophic consequences for aircraft. The high stren…
A DC-excited high torque electromagnetic brake has been designed for high-speed train in WHMFC. An electromagnetic-thermal analysis model for electromagnetic brake analysis has been developed, taking into account the specific heat capacity-temperature relation, nonlinear magnetization-saturation and the skin effect. W…
We report first principles studies of p-type doping properties of ZnMgO wide-gap semiconductor alloy. The band gaps of ZnMgO and doped ZnMgO are found to be controllable, and hence one can tailor the band gap of ZnMgO or doped ZnMgO to design devices by controlling Mg composition. According to defect formation energie…
In this work, a comparison study has been performed on the two hot finished manufacturing processes i.e. hot extrusion and hot piercing which are used for manufacturing stainless steel hot finished pipes/tubes. Study is based on different parameters which include raw material, temperature, extrusion ratios, manufactur…
By using natural bamboo as biotemplate, we synthesized mesoporous silica by Hydrothermal method followed by calcination at 650°C. And it was functionalized with aminopropyltriethoxysilane (APTS) in dry toluene under nitrogen atmosphere. As-synthesized Amino-functionalized mesoporous silica (NH2-MS) were characterized…
The two-mode phase field-crystal (PFC) method is used to simulate the nanograin growth, including the grain growth in different sets of crystal planes, the grain boundary structure with mismatch, the grain orientation and also the incoherent grain boundary in two dimensional plane. It is obviously observed that there…
The change in the direction of the circumferential lattice magnetization by using the spin-polarized current is found by magnetic force microscopy to be possible for square epitaxial Fe (001) microstructures in the basic state. Such a change of the magnetization occurs when applying the magnetic saturation field to th…
FePO4·2H2O with orthorhombic flower-like microstructure was synthesized by a facile hydrothermal process which was of low-cost and easy processing in large area. The formation mechanism of the flower-like FePO4·2H2O was discussed in details by investigating the different concentration of reactants and reaction time. T…
Two methods of improving measurement accuracy of Ka-band wave reflection coefficients close to one due to indirect measurements are described herein. One of them is based on using multiple wave reflections in the open resonator of specific geometry, while another one- on the measurement of S-matrix of system, consisti…
1-x-y)BaTiO3-xBi (Mg1/2Ti1/2)O3-yBiFeO3 ceramics were prepared by a conventional solidstate synthesis, and crystal structure and electric properties were investigated. Synchrotron X-ray diffraction pattern revealed that a single perovskite phase was obtained for samples at x=0.05-0.15, y=0.46.5-73.5. Splitting of the…
We propose a broadband measurement method for measuring the electromagnetic properties of metamaterials in the frequency range (1-6 GHz). In this experimental technique, an original adjustable height strip transmission-line was developed, which allows characterizing several layers of metamaterial. Therefore, the influ…
We report our recent achievements in tuning metamaterials with light. We introduce a novel approach to design metamaterials with sign-varying nonlinear response. For this purpose, we use split-ring resonators loaded by photodiodes and varactor diodes. A non-monotonic frequency shift of the resonance frequency dependin…
Holographic data storage (HDS) is transitioning to second-generation technologies in order to meet the demands of big data. Akonia Holographics is developing an advanced HDS demonstrator platform featuring a high NA recording geometry, novel multiplexing methods, and coherent channel techniques to meet these challenge…
In this paper we studied capturing buried void defects in copper (Cu) wires using an electron beam inspection (EBI) system. These are defects of interest (DOI) to integrated circuit (IC) manufacturers because typical defect inspection techniques cannot capture them: optical defect inspection, EBI voltage contrast (VC)…
Grinding experiments were conducted using vitrified CBN wheel on particulate reinforced titanium-based matrix composites (PTMCs) and Ti-6Al-4V matrix. The issues discussed are grinding forces, surface roughness, and the formation of surface integrity. The main results are summarized as follows: (1) The grinding forces…
Chemical bath deposited ZnS thin films are promising buffer layers for thin film solar cells, replacing the environmentally hostile CdS buffer layers currently in use. Reflection, absorption and scattering are the three main light loss mechanisms in buffer layers. In this work, improved process conditions, such as mag…