Moath Tarawneh

Pre-mixed NiZn ferrite/MWNT, according to the weight ratio 1:1, were incorporated into the thermoplastic natural rubber nanocomposite by melt blending process. The effect of different filler loadings (2-10 wt%) on reflection loss and shielding effectiveness of the obtained composites were studied. It was found that both reflection loss (RL) and shielding effectiveness (SE) depend on the filler content. The effect of fillers mixing ratio were investigated too. Results showed samples with higher MWNT content exhibits better shielding effectiveness, while samples with higher NiZn ferrite achieved better reflection loss. The microwave absorbing properties of these samples can be adjusted according to desired application.

ABSTRACT Aluminum and its alloy are light in weight, ductile, strong and long lasting, having high corrosion resistance, good conductor of heat and electricity and are 100% recyclable. Despite all these good qualities, it has low wear resistance. But some applications entail high hardness and tensile strength, high modulus of elasticity than the conventional aluminum alloy with good tribological properties. Keeping in view the enhancement of mechanical as well as tribological properties with reduction in weight, the aluminum alloy is reinforced with a second phase which is hard and brittle, and the newly formed material has better mechanical and tribological properties. The paper reviews the various manufacturing processes of aluminum matrix composites, and it was found that the mechanical and tribological properties of the single reinforcement composites are better as compared to pure aluminum and its alloys irrespective of the aluminum matrix composites manufacturing process. Further, it was found that most of the hybrid composites exhibit better mechanical and tribological properties as compared to single reinforcement composites.