MECHANICAL PROPERTIES OF AL2NI3 COMPOSITE REINFORCED WITH CARBON NANO-TUBES UNDER UNIAXIAL DEFORMATION

10.25712/ASTU.1811-1416.2025.02.007

Abstract

Abstract. Lightweight intermetallic compounds such as nickel aluminides combine high thermal conductivity and mechanical stability, especially at high temperatures. These intermetallic compounds have found wide application in the aerospace and automotive industries. However, nickel aluminides have low fracture toughness and low ductility. In this study, carbon nanotubes (CNTs) are proposed as a reinforcing element for intermetallic matrices due to their high mechanical properties. The effects of ambient temperature and CNT volume fraction in the composite on the mechanical properties of the Al₂Ni₃ intermetallic compound are investigated. In the present work, the change in the Young's modulus and the tensile strength of the composite for temperatures from 300 to 1700 K and a volume fraction of CNTs from 2% to 6% was studied using the molecular dynamics method. It was found that at high temperatures, the Young's modulus of composites containing more than 2% CNTs increases by 28%. However, the obtained results show that the tensile strength of the Al₂Ni₃ intermetallic compound decreases with the introduction of CNTs. A significant reduction is observed with the introduction of 1-2 CNTs, however, for the model with 4 CNTs, a slight improvement in this indicator was obtained at high temperatures.