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SiCp/Cu gradient composites were fabricated by powder metallurgy using the process of dual-directional extrusion of the floating die. The microstructure and conductivity of SiCp/Cu graded composites were studied by optical microscope and current conductivity instrument. The results show that the SiCp/Cu gradient composites are continuous, and the distribution of reinforced particles is gradient. The...
In order to study the effect of plastic deformation on microstructure and mechanical properties of as-cast AZ80 magnesium alloy, the experiment of direct extrusion was done to homogenized billets. The microstructure and mechanical properties of original samples and deformed samples were investigated. Experimental results show that homogenization can increase the mechanical properties of as-cast AZ80...
In this work, single PbZrTiO3 fibers were produced by a thermoplastic extrusion process. Afterwards, green fibers were sintered under PbO and PbZrO3+ZrO2 atmosphere and revealed single fibers and their 1-3 composites were analyzed and compared regarding electromechanical properties. The 1-3 composites show a higher coercive field. Microstructure of the sintered fibers and phase compositions across...
The effect of temperature and heating rate on density, pore size, porosity, bending strength and water flux of sintered Al2O3 body was studied in this research. Carboxymethyl Cellulose (CMC) 3% by Al2O3 weight was used as additive. The Al2O3 particle sizes were varied at Al2O3 5 mum and the mixture of Al2O3 0.7 mum (50 wt%) and Al2O3 5 mum (50 wt%). The mixture was then extruded, dried and sintered...
The mechanical properties of commercial polycrystalline pure niobium sheet used for superconducting radiofrequency cavities are known to provide inconsistent yield, springback and surface smoothness characteristics when plastically formed into a radiofrequency cavity. These inconsistent properties lead to significant variations in cavity geometry and thus superconducting cavity performance. One approach...
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