Cold spraying(CS),as a new coating technique,has been increasingly attracting more and more domestic researchers.A brief introduction of potential applications of the CS technique involving protective coatings,functional coatings,spray forming,parts repair and restoration,etc.was made.The key research directions in the present CS research items were discussed,which were the bonding mechanism of particles and the fabrication of metal matrix composites by CS.Moreover,the present problems existing in CS were p...