Developments of fabricating nanostructure coatings by cold gas dynamic spraying

Cold gas dynamic spraying (CGDS) is one kind of novel surface engineering technologies, depositing diversified metal, alloy and composite coatings by high-speed gas current under room temperature or with a little heated. Due to its peculiar characteristics such as low spraying temperature, nonoxidation, low stress among coating layers, compactification, as well as high utilization rate, especially the technical advantages on fabricating nanostructure coatings, the CGDS process has attracted great attention. The paper reviews the current situation of researches on the CGDS technology, and summaries its development in fabricating pure metal, alloy as well as composite nanostructure coatings, mainly including their microstructures, properties, characteristics and applications.