Materials Literature
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Magnesium matrix composites reinforced by SiC particles of different size have been fabricated by vacuum pressure infiltration to investigate the influence of volume fraction and particle size on wear properties. It was found that the wear resistance of SiCp/Mg composites increased as volume fraction of particles with…
Carbon fine particles including single-walled carbon nanotubes (SWNTs) were successfully synthesized in the gas phase by hot filament thermal chemical vapor deposition with radio-frequency (RF) plasma. The process of formation of fine particles was monitored from the variation of RF self-bias voltage. Synthesized carb…
Characterization and measurement science lies at the core of fundamental and applied research, technology development, and commercialization in every scientific discipline. Unfortunately, the importance of the characterization process and its burden on time and money resources is often overlooked and becomes a bottlen…
Continuous extrusion foaming of CO2gas is an efficient method to produce microcellular. The CO2concentration in polymer melt is related to initial bubble morphology. Using video recording in this paper bubble interfacial morphology was studied when the gas was injected into polymer melt . The process of single bubble…
In this paper are introduced basic magnetic resonance (MR) methods for measuring the properties of the conductive gel structure during polymerization, particularly relaxation times T1, T2. Gel electrolytes based on the NaClO4inorganic salt was measured. The measurement deals with23Na nuclei. In our case to measure rel…
Hydrous-ethanol is reformed to hydrogen-rich mixture gas which is an excellent fuel for engines. The advantages of this approach are that fossil fuel consumption and CO2 emissions are reduced, and the waste heat from engine exhaust can be used as energy source for hydrous-ethanol evaporating and reforming. The experim…
In this study, the combination of both thermal analysis and dielectric techniques were showed to be useful to characterize a biopolymer in the hydrated state. The "filling" of the hydration shell of elastin is followed by DSC. The first hydration shell is completely "full" for 1.2-1.3 molecules of water bound to one e…
The Pb 5 Sb 4 S 11 -Pb 2 SnSb 2 S 6 system was studied by a number of physicochemical methods, and its phase diagram was constructed. It was found that the system under investigation is a quasi-binary eutectic type section of the SnS-PbS-Sb 2 S 3 ternary system. The coordinates of the eutectic are found to be 33 mol %…
The capability of carrier collection was investigated for an organic heterointerface with conductive polymer nanofibers and a fullerene derivative. The electrospinning method was employed for fabricating conductive polymer nanofibers. In a photovoltaic device with this heterointerface, a rather large photocurrent was…
Subscript textThe Co3O4 nanocubes were synthesized by hydrothermal process. The products are characterized in detail by multiform techniques: scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and energy-dispersive X-ray analysis. The results show that the products are uniform nanocubes…
Based on the former works, this paper demonstrates a new way in making RF capacitor accelerometer based on LTCC substrates, which resist high temperature to a great extent. Moreover, as many parts in an automobiles and aeroplane, such as engine, bearing and gear would dissipate much heat, thus we decided to use LTCC t…
Glycidoxypropyltrimethoxysilane (GPTMS) was employed, for the first time, as a new sonochemical promoter for the synthesis of gold nanoparticles (NPs) as well as γ-Fe2O3/Au@SiO2nanocomposites. In either case, GPTMS shows higher efficiency at reduction rate of Au(III) than conventional radial scavengers (alcohols), whi…
We report the synthesis, photophysical investigation, computational studies and electroluminescent(EL) properties of an organic electroluminescent material-Bis(8-hydroxyQuino line) acetylacetone aluminum (Alq2A). It is characterized by 1H NMR, IR and elemental analysis techniques. The absorption and fluorescence spect…
The infrared radiation materials of transition metal oxides doped cordierite systems are synthesized using graded solid phase sintering. And the infrared radiation properties are investigated by means of X-ray diffraction, infrared spectrometry and scanning electron microscope. The results show that new compounds are…
In the paper the coiling process of Electrical motor stator iron core and its present condition are introduced. The coiling mechanism of inner stator iron core is analyzed. How to get the coiling parameters: pitch of tooth tape and recover value of coiling by FEM is discussed in details. It is verified by the results…
According to standard test method for fatigue crack growth rates of metallic materials, the crack growth rate of 30NCD16 at three stress ratio (R=0.1, 0.3 and 0.5) were measured. Based on linear elasticity fracture mechanics theory, the fatigue crack growth rate was studied through the nonlinear least squares fitting…
Additions (ZnO, CuO) doped 0.98(Na0.5K0.5)NbO3-0.02Li(Sb0.17Ta0.83)O3 (0.98NKN-0.02LST-x) lead free piezoelectric ceramics have been fabricated by ordinary sintering technique. The effects of additions doping on the dielectric, piezoelectric, and ferroelectric properties of the ceramics were mainly investigated. X-ray…
Tuning the relative energy levels in coupled quantum dots with an applied electric field results in controllable spin interactions of bound carriers. These interactions may provide new directions in engineering these systems for optical and spintronic applications. Using polarization resolved photoluminescence experim…
The effect of AlN buffer layer on the quality of GaN epilayer grown on Si substrate by metalorganic chemical vapor deposition (MOCVD) has been investigated. It was found that the quality of GaN epilayer strongly related with the crystal quality of AlN buffer layer. As the full width at half maximum (FWHM) of AlN (0 0…
Self-assembled monolayer of n-tetradecanoic acid (CH3(CH2)14COOH) are formed on the native oxide surfaces of Fe3Al. The structure of the monolayer is probed with contact angle measurement and SEM. The results (indicate) that the structure of the adsorbed film like lotus structure and the contact angle are larger than…