This monograph presents the scientific foundations of cold gas-dynamic spraying (CGDS), a technique developed based on the phenomenon of solid-phase coating formation observed at the Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences. It explores the creation of new technologies derived from this process. The book summarizes the experimental and theoretical research results concerning the acceleration of high-dispersity particles in supersonic nozzles, jets, and the compressed layer before an obstacle. It delves into the dynamics of shock loading, high-speed elastic-plastic deformation, erosive-adhesive transitions, and the peculiarities of local energy release and physicochemical interactions at the contact interface that lead to bond formation. Additionally, it describes the experimental setups and diagnostic methods developed for these studies, as well as the structure and properties of coating materials. The monograph also outlines innovative technologies designed for application across various industrial sectors. This work is intended for specialists in cold gas-dynamic spraying, mechanics, computational mathematics, and the physics of powder materials, as well as graduate students and university scholars.