Development of High Temperature Gas Heater in the Cold Spray Coating System

This paper describes the development and use of a gas heating system for cold spraying. By heating helium and nitrogen gases to temperatures of up to 900 °C, deposition efficiencies of more than 90% have been achieved for titanium, niobium, and stainless steel as well as aluminum, copper, and nickel. Numerous coating examples are presented and discussed.