Powder processing methodology for production of graphene oxide reinforced aluminium matrix composites

Fabrication of bulk aluminum-graphene nanocomposite through friction stir alloying

“…Moreover, the hardness of Al-GNP composite observed in the present study is in accordance with the hardness values of previous studies as depicted in Figure 15. [29][30][31][32][33][34][35][36][37] This phenomenon is attributed to the well-established strengthening mechanisms such as grain refinement, increase in dislocation density by work hardening or thermal mismatch, Orowan strengthening, and transfer of load from the matrix to reinforcement. The dynamic recrystallization during FSA results in the high degree of grain refinement.…”

Avaliação Da Microdureza De Nanocompósitos De Matriz De Alumínio Reforçados Com Óxido De Grafeno Reduzido

“…Nessa figura a microdureza encontra-se expressa em termos do ganho percentual relativo (comparação com o alumínio não reforçado), permitindo assim uma melhor comparação entre os diferentes trabalhos. A seleção dos trabalhos utilizados nesta comparação foi baseada na semelhança em termos de metodologia de processamento (metalurgia do pó/moagem de alta energia) (ALRASHEEDI, 2016;BAIG et al, 2018;BARTOLUCCI et al, 2011;DASARI et al, 2018;ELGHAZALY;ANIS;SALEM, 2017;KHAN et al, 2017;LATIEF et al, 2011;XIONG, 2017a;LI et al, 2018a;LIU et al, 2016a;PÉREZ-BUSTAMANTE et al, 2014;RAJ et al, 2020;SUN et al, 2017;SYED NASIMUL ALAMN, 2016;TURAN;AYDIN, 2020;WANG et al, 2019. Em função de não haver outros trabalhos na literatura até o momento que apresentem resultados de microdureza para NCMAs reforçados com rGO quimicamente reduzido, foi incluído nessa comparação os resultados de microdureza para o NCMA-rGO termicamente reduzido e NCMA reforçado com outros materiais grafênicos (GNPs ou GNS), como detalhado na legenda da Figura 6. Verifica-se nesta Figura, em função…”

Production of Al-5Cu Alloy Composites Reinforced with Few-Layered Graphene by Powder Metallurgy Method

“…Aluminum (Al) metal matrix composites are widely used in the automotive, aircraft and defense applications because of its good thermal and electrical conductivity, high tensile strength-to-weight ratio, high hardness, and ductility properties [1][2]. Various reinforcement materials such as Al2O3, SiC, B4C, TiC,C with low density, good mechanical and chemical properties, high thermal stability and Young's modulus, good processability are used for Al metal matrix composites [3].…”

“…Various reinforcement materials such as Al2O3, SiC, B4C, TiC,C with low density, good mechanical and chemical properties, high thermal stability and Young's modulus, good processability are used for Al metal matrix composites [3]. Graphene, which is one allotrope of carbon, due to its sp 2 hybridized two-dimensional honeycomb structure, low weight, thermal, electrical, and mechanical properties; has attracted great attention around the world. It can be considered as the ideal reinforcement for Al-based matrix composites with very high electrical (electron mobility, 1500 cm 2 V -1 s -1 ; resistance 10 -6 Ωcm) and thermal conductivity (5.3×10 3 Wm -1 K -1 ), low thermal expansion coefficient (-6×10 -4 K -1 ), self-lubricating and excellent mechanical properties (tensile strength 130 GPa; elastic modulus 0.5 -1 TPa.)…”