Study on the uniaxial tensile mechanical behavior of two-dimensional single-crystal aluminum nitride

• DOI: 10.1088/1402-4896/ad8b76
• Publication Date: 2024-10-25T22:52:56Z
• Authors: Yan He; Kaiyuan Wang; Meiling Tang; Lin Fan; Jingting Sun; Xingjun Gao
• Keywords: Uniaxial tension

Abstract To investigate the tensile behavior and mechanical properties of single-crystal aluminum nitride (AlN) at microscopic level, molecular dynamics simulations were used to study effects crystal orientation, strain rate, environmental temperature, hole defect size on fracture strength, mechanism, potential energy during uniaxial tensile. The results show that strength AlN in [100] direction is stronger. anisotropic characteristics Al-N bonds crack growth cracking degree are significant when stretched along [100], [010], [110] directions. Under high temperature condition, lattice structure undergoes changes, causing grain boundaries move slip. This facilitates breaking bonds, leading a decrease reduction stored energy. Hole defects cause more damage, reducing required for breakage facilitating propagation microcracks. Additionally, it was found rate affects stress–strain model. An increase leads an stress, rapid deformation being form Therefore, improved.