The Effect on the Electrical Conductivity of Doping Cerium, Cerium Oxide, and Lanthanum (37.5%)-Tellurium (62.5%) on Aluminum Alloy 1350

Doping cerium, cerium oxide, and lanthanum-tellurium on aluminum alloy through the process of sand - casting can modify the alloy's electrical conductivity and tensile strength. In this study, the dopant type with varying concentrations of rare earth elements (RRE) was the key parameter that provided the electrical conductivity and tensile strength values. The result showed that doping rare earth oxide can harm the strength of casting by inducing an oxide layer accompanied by pores and cracks. The substantial structural strain between the lattices offers additional resistance to electron flow, reducing the overall conductivity of the alloy. Small additions of 0.25 wt% RE are responsible for the enhanced strength and conductivity through the formation of RE - rich intermetallic phases, as they can pin dislocations, thereby preventing the movement of dislocations. In summary, the lanthanum-tellurium-doped alloy has the highest conductivity and strength compared to the other specimens.