Interface temperature evolution and bonding characteristics analysis induced by microparticle impact

The energy conversion and heat production resulting from plastic deformation induced by microparticle impact affects a change in interface temperature, which varies with the initial state of the microparticle. Due to the instantaneous and microscopic characteristics of microparticle impact process, interface temperature has not been fully studied. Thus, evolution theory of the impact interface temperature with initial velocity is proposed based on the Hugoniot equation, and the predictive outcomes of the evolution theory are verified by numerical model. Furthermore, it is demonstrated that microparticle bonding occurs below the melting point by comparing theoretical bonding temperature with melting temperature. Notably, the trend of the difference between interface temperature and melting point with varying impact velocity reveals disparate driving mechanisms for bonding and melting. The interface temperature evolution theory and bonding characteristics analysis facilitate understanding the heat generation mechanism and temperature action of microparticle impact, and provides a new perspective for the interface regulation and bonding state determination.