上海科技大学知识管理系统

In this work, the plastic deformation behavior of AlON nanopillars with , , and crystallographic orientations was investigated via in situ transmission electron microscope compression experiments. High-resolution transmission electron microscopy observation and precession electron diffraction indicated that AlON nanopillars with different crystallographic orientations exhibited obvious plastic deformation under room temperature on the nanoscale. Under uniaxial compression, the {100} non-close-packed planes were activated in the -oriented nanopillars, leading to slip along the crystal plane. Plastic deformation in the -oriented nanopillars occurred through partial crystal rotation along the {111} close-packed planes. For -oriented nanopillars, it was found that the plastic deformation was achieved by activating slip on the {111} close-packed plane. The plastic deformation mechanisms of AlON single crystal nanopillars with different grain orientations exhibited significant anisotropy, which was closely related to the Schmid factor of crystallographic orientations across different slip systems. These results renovated the conventional understanding of the compression behavior of AlON single crystals. © 2025 Elsevier B.V.