A laser-based experimental apparatus for studying the dynamic impact between thin films and high velocity microparticles

The mechanical behavior of thin films under high-impact conditions from micro-particulates has been an important issue. However, accurately assessing mechanical behavior in extreme environments (10⁸ s⁻¹) based on velocity stability remains challenging. The aim of this study is to develop an experimental method to improve the micro-particle emission velocity stability and to provide a reliable experimental technique to evaluate the force properties of thin films. In this study, accurate control of micro-particle velocity was achieved by adjusting the amount of laser energy. Thin films of Cu and Ni were selected to verify velocity stability and analyze the effects of impact and rebound energy, as well as the energy dissipation mechanisms, in extreme environments. This study presents a test method for assessing the impact resistance and energy dissipation mechanisms of films, providing a reference for the study of impact resistance in thin films under high strain rates.