Advanced Materials Research Vols. 150-151

Abstract: Ti-Zr-Ni icosahedral quasicrystals (IQCs) have been regarding as potential hydrogen storage materials due to their high hydrogen ability. Nevertheless, their hydrogen capacities are largely different as reported by different researchers, which is toughly understood.We investigated in this paper deuterium absorption at room temperature for quasicrystalline alloys Ti45Zr38Ni17, Ti41.5Zr41.5Ni17, Ti40Zr40Ni20 with corresponding phase structures of IQC+β(Ti,Zr), IQC+C14(TiZrNi), IQC. The results indicated the same solid solution state for the deuterium in these alloys, whose deuterium concentration was 12~13mmol/g. Given that all these alloys are in a single IQC phase, we believe very similar deuterium capacities for them, which surely needs more strict experimental evidence.

Abstract: Layered films of polyalkylthiophene-6 (PAT-6) and polyvinylcarbazole (PVK) which are expected to be a photo-electronic device were fabricated from blend solution by self-assembly at only one casting process. Cross-section structure of the blend polymer films were observed by digital microscope and analyzed by using Energy Dispersive Spectroscopy (EDS) and FT-IR spectrometer. Stratified structure with component distribution along thickness direction was found to be self-assembly at the suitable casting condition. It was considered that the structure was controlled by the evaporation speed of solvent and properties of the solubility parameter and density of the polymer.

Abstract: The temperature distribution of the work roll affects the shape and size of final product in aluminum strip cold rolling process. The segmental model is presented to explore the boundaries of the roll. The surface of the work roll is divided into 5 different regions including the outlet roll-strip contact region, the inlet roll-strip contact (bite) region, the roll-spray region, the roll-air region and the roll-roll contact region. Based on the analysis of the roll pressure, the mathematical models of the plastic doformation work and friction heat are proposed to calculate the temperature variation in bite region. The boundaries, including heat convection with lubricant/air and heat conduction with the backup roll, are considered to model the work roll’s temperature distribution.

Abstract: In the paper, the SF polymer water lubricated bearings is taken as the research objects. Both material testing and bearing simulation testing are carried out to research the tribological properties of bearings including water swelling properties, friction coefficient, and wear-resistant properties mainly. The results show that the SF material, which is a new type of material used in water lubricated tail bearing, has the characteristics of low friction coefficient, high load capacity, good wear-resistance, excellent self-lubricating properties, and low water swelling, which has a broad application in the shipbuilding industry.

Abstract: PTT/SEBS-g-MA/organoclay ternary nanocomposites were successfully prepared using melt blending. The effect of organoclay platelets on morphologies properties of PTT/SEBS-g-MA/organoclay ternary nanocomposites had been studied by XRD and SEM. The nanocomposite forms an exfoliated structure, which can be observed by XRD. The dispersed domain size (D) of SEBS-g-MA is affected by organoclay. The high aspect ratio of the organoclay platelets induced the average size of the dispersed domain to become smaller.

Abstract: Pb(Zr0.53Ti0.47)O3 thin films with thickness of 120nm, 190nm, 310nm, 440nm and 630nm were deposited on Pt/Ti/SiO2/Si substrates by sol-gel process through repeating spining process 2 times, 4 times, 6 times, 8 times and 10 times respectively. The structures of PZT films were investigated by SEM and XRD analysis. The ferroelectric hysteresis loops were recorded by Radiant Precision Workstation and dielectric properties were measured using an Agilent HP4294A impedance analyzer. X-ray diffraction indicated that with the film thickness increasing, the diffraction intensity increased. The thickness of PZT film had great effect on ferroelectric and dielectric properties. Conclusively when the film thickness was about 310nm, the PZT thin films possessed better ferroelectric and dielectric properties.

Abstract: Two-stage heat treatment process which has guiding significance for continuous annealing TRIP steel producing was applied in this research. Different matrixes such as polygonal ferrite matrix, bainite ferrite matrix and annealed martenite matrix were obtained through different heat treatment processes. Compared the transformation-induced plasticity (TRIP) behaviors of three different tested samples，and the corresponding process for required product properties can be chosen. It was found that the needle-like retained austenite obtained in AMT steel was isolated from other microstructures while the retained austenite in the other two samples appeared to be equiaxed or network structure. The elongation, yield ratio and stability of retained austenite in AMT steel were all higher than that in PFT or BFT steels. BFT steel possesses highest tensile strength and lowest elongation while the yield ratio, RA content and carbon concentration in RA were all lowest for PFT steel.

Abstract: This experiment used shale and sludge containing water as main raw materials combining with cow dung to manufacture a new kind of ceramisite. In this paper we mainly study the influence of addictive –cow dung, preheating system and roasting system on the properties of ceramisite such as multiple expansion, apparent density, bulk density and water absorption etc.

Abstract: This paper presents an experimental study in high speed milling of SiCp/Al composites. Machining tests were carried out on a high speed milling machine by using chemical vapour deposition (CVD) diamond coated tools. The surface micro-topography was tested by the OLS3000 Confocal Laser Scanning Microscope. The Gaussian filtering method and the least square fitting method were used to treat the measured results. Two methods are compared according to the effect on keeping important original surface’s character. The results showed that the least square fitting method is suitable due to its good accordance to the original surface’s character.

Abstract: As by-product of steeling making, steel slag accounts for 10% to 13% of steel production. Utilization of it as resource has been tried in many fields. For example, it can be used as building materials, most for paving and backfilling. However, utilization level of steel slag is still low, and to find a novel way to utilize steel slag efficiently is urgent. Steel slag includes much calcium and silicon, similar to those of clay, which means that it can be one of the raw materials for ceramic sintering. In this research, the process of steel-slag based ceramics sintering was developed. The ceramic tiles with excellent performance were obtained, with up to 36% steel slag added. By EPMA, the possible crystal phases that exist in the ceramic samples have been discussed. By XRD analysis, the main crystal phases of steel slag ceramics were identified, which are anorthite, α-quartz and magnetite. The clinoenstatite can be obtained through increasing the proportion of steel slag in the formula. The diopside can be obtained if the talc was added. These are key factors to obtain excellent performance ceramic tiles under low sintering temperature.