The Effect of SiC and MgO Ceramic Reinforcements on the Mechanical Behavior and Electrical Properties of the Composite Structure in Al7075/SiC/MgO Hybrid Composites
Abstract
In this study, certain technical properties of new generation aluminum-based composites, obtained by combining the Al7075 alloy widely used in the industrial field with two different ceramics, were investigated. For this purpose, SiC and MgO ceramics in particle form were reinforced into the Al7075 matrix material using powder metallurgy technique and composite structures were produced in three different reinforcement ratios. Measurements to determine electrical resistance and conductivity and bending and compression strength tests were performed on the obtained composite structures. The density and porosity amounts of the composite structures were also determined, and their microstructures were examined with a digital microscope. With the increase of SiC/MgO amount in the aluminum composite structure, the electrical resistance increased, and the conductivity value decreased. With the effect of SiC/MgO reinforcing materials, the density value of the composite structures decreased while the amount of porosity increased. The hardness values increased due to the effect of SiC and MgO ceramics in the structure. The bending and compression strength values initially increased and then started to decrease with the increase of reinforcement ratios. It has been determined that the formation of porosity in the composite structure negatively affects the mechanical behavior. The second important factor was evaluated to be the amount and shape of ceramic-based reinforcement particles in the structure. Due to the effect of SiC, which has very high electrical resistance, and MgO, which has dielectric properties, the electrical conductivity values of the composite structures decreased. The increase in electrical resistance and the decrease in electrical conductivity were directly proportional to the amount of ceramic-based reinforcement particles in the composite structure.
Keywords
Al7075 Composite, SiC, MgO, Mechanical Strength, Electrical Behavior
References
- Aneta Szewczyk-Nykiel. (2017). Microstructure and properties of sintered metal matrix composites reinforced with sic particles, Technical Transactions, 6/2017, 179-190 DOI: 10.4467/2353737XCT.17.098.6574
- Anil Kumar Bodukuri, K. Eswaraiah, Katla Rajendar,V. Sampath. ( Fabrication of Al-SiC-B4C metal matrixcomposite by powder metallurgy techniqueand evaluating mechanical properties, Perspectives in Science, (2016) 8, 428-431 http://dx.doi.org/10.1016/j.pisc.2016.04.096
- Asif Iqbal AKM, Dewan Muhammad Nuruzzaman. (2016). Effect of the Reinforcement on the Mechanical Properties of Aluminium Matrix Composite: A Review, International Journal of Applied Engineering Research, Vol 11, No 21 (2016) pp. 10408-10413
- Aydın M., An Experimental Study of the Effects of Ceramic Composition on the Electrical and Thermal Properties of Al/SiC Composites, European Journal of Science and Technology No. 25, pp. 721-726, 2021, DOI: 10.31590/ejosat.943506)
- Azim Gökçe, Fehim Fındık, Ali Osman Kurt (2017). Alüminyum ve Alaşımlarının Toz Metalurjisi İşlemleri, Mühendis ve Makine cilt 58, sayı 686, s. 21-47.
- Balaji P., R. Arun, D. JegathPriyan, I. Madhan Ram, E. Manikandan. (2015). Comparative Study of Al 6061 Alloy with Al 6061 – Magnesium Oxide (MgO) Composite, International Journal of Scientific & Engineering Research, Vol 6, Iss 4, 2015 408-412
- Chi Caoa, Xuezheng Zhanga, Tijun Chena, Yushi Chena. (2016). Effects of Processing Parameters on Microstructure and Mechanical Properties of Powder- Thixoforged SiCp/6061 Al Composite, Materials Research. 2016 0466 1-13 DOI: http://dx.doi.org/10.1590/1980-5373-MR-2016-0466
- Cihad Nazık, Necmettin Tarakçıoğlu, Serdar Özkaya, Fatih Erdemır, and Aykut Çanakçı. (2016). Determination of Effect of B4C Content on Density and Tensile Strength of AA7075/ B4C Composite Produced via Powder Technology, International Journal of Materials Mechanics and Manufacturing, Vol. 4, No. 4, 2016 251-254 DOI: 10.18178/ijmmm.2016.4.4.266
- Dewan Muhammad Nuruzzaman, Farah Fazira Binti Kamaruzaman, and Nasrah Binti Mohd Azmi. (2016). Effect of Sintering Temperature on the Properties of Aluminium-Aluminium Oxide Composite Materials, International Journal of Engineering Materials and Manufacture, (2016) 1(2) 59-64
- Hashim, J., Looney, L., Hashmi, M.S.J. (2001). The Enhancement of Wettability of SiC particles in Cast Aluminium Matrix Composites, Journal of Materials Processing Technology, 119, 329-335.