The influence of SiC particulates addition on the electrical behaviors of Al / SiC matrix composites was studied. The composited samples were prepared from Al-SiC powdered mixtures having different SiC content in the range of 40-70 wt% SiC particulates with particle sizes lower than 45-μm. The resultant powders were then uniaxially pressed in cylindrical steel die to obtain a compact disc-shaped of 1.5 cm in diameter. The compacts were sintered in the temperature range of 800 ˚C and 1100 ˚C. Electrical and dielectric properties (a.c. Conductivity, dielectric constant, dielectric loss, and dielectric loss factor) were measured for these sintered samples in the frequency range 200 Hz -6GHz. From the results obtained it was concluded that the formation of new phases (as proved by XRD) plays a major role in the properties of these composites. Also a jump-like behavior in the measured electrical conductivity and the abrupt changes in the dielectric constant behaviors suggest frequency-dependent two-mechanisms for conduction at different SiC content.

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Experimental analysis of electrical properties of composite materials AIP Conference Proceedings 1809, 020016 (2017); https://doi.org/10.1063/1.4975431The investigation of the effect of particle size and velocity on solid particle wear properties of basalt base glass-ceramics AIP Conference Proceedings 1809, 020022 (2017) Abstract. Different composition of (Sn -Bi) powder of (800-100) μm, grain size were achieved. Three types of alloy were fabricated by melting under (350°C) in inert atmosphere. X-ray diffraction indicated the formation of (Sn-Bi) alloys. Melting points were conducted. Optical micrographic investigated to study the main structure characterization for all fabricated alloys. Hardness test reflect the ductile form for all the three alloys with a remarkable value of 26 HRB for the alloy 40 wt.% Sn-60 wt.% Bi.

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Composites of polyaniline-polyethylene-copper were prepared using different weight percentage of nano copper particles of 100 nm size. X-ray diffraction and Fourier transform infrared spectroscopy were done to identify the crystal structure of prepared polyaniline and polyaniline-polyethylene-Cu, respectively. Electrical properties for all the combinations of 5, 10, 15, 20, and 25 wt% copper were examined as electrical conductivity, capacitance, and dielectrical constant. The remarkable improvement in all the electrical properties were indicated after adding nano copper particles, accept the combination P-Ani-5 wt% Cu. Scanning electron microscopy results confirm the dispersion of nano copper particles through their microstructure.