Mikrodalga sinterleme ile üretilen alüminyum alaşimi esasli sic gr takviyeli hibrit kompozitlerin tribolojik özelliklerinin i̇ncelenmesi

Composite materials are materials that are formed by combining two or more materials at a macroscopic size and can have unique properties with the design made. Metal matrix composite materials; They have a wide range of usage in the automotive, aviation and space, maritime and defense industries due to their mechanical and physical properties such as high strength, low cost, high wear and corrosion resistance, toughness, thermal and thermal conductivity. The most commonly used material type among metal matrix composite materials is aluminum metal matrix composite materials. The generally preferred production method in the production of these materials is powder metallurgy. Powder metallurgy is a production method that is simple as a process, relatively cheaper compared to other techniques when evaluated in terms of cost, has almost zero material loss during production and high mechanical values are obtained. In the powder metallurgy method, the process step in which properties such as strength are imparted to the material is the sintering stage. Sintering is a heat process in which chemical bonds between particles are created and thus strength is increased. Today; Studies are being carried out on sintering techniques that are more advantageous in terms of cost and time. The most prominent method among these techniques is microwave sintering. In this study, SiC-Gr reinforced aluminum metal matrix composite materials were produced by microwave sintering using the powder metallurgy method. For the aluminum metal matrix alloy, 0.4% Cu, 0.8% Mg, and 0.6% Si powders by weight were used. While the Gr ratio, one of the reinforcement elements, was kept constant at 3% by weight of the sample, SiC was used in four different ratios as 0, 1, 3, 5% by weight. The powders were mixed for 2 hours to create a homogeneous material distribution. The mixed powders were pressed one-way with a 600 MPa press using a 100-ton press. Al-Mg-Si-Cu metal matrix Gr-SiC reinforced raw hybrid composites were heated at 600 °C for 30 min with a heating rate of 15 °C/min. They were microwave sintered for a period of time. The microstructural properties, microhardness properties and tribological properties of the produced hybrid composites were examined. Microstructural examinations of the samples were carried out using scanning electron microscopy (SEM). Secondary electron detector (SED) and backscattered electron detector (BSED) were used in the investigations. Energy dispersive X-ray spectroscopy (EDX) detector was used for elemental analyses. A tribometer was used for tribological tests. The studies carried out and the results obtained show that Gr-SiC reinforced hybrid composites have improved wear resistance.