1. Institute of Multi-Dimensional Additive Manufacturing, Faculty of Mechanical Engineering and Mechanics,Ningbo University, Ningbo 315000, China
2. Anhui Ma Steel Surface Technology Co., Ltd., Ma anshan 243000, China
Cold spray is an emerging coating preparation technology with advantages of high deposition efficiency, low porosity and high bonding strength, which has broad application potential in aerospace, automobile, energy, ocean, petroleum and chemical industries. The research focus of cold spray has transformed from theoretical research to industrial application over the past 30 years. Therefore, development history of bonding mechanisms and material systems of cold spray was reviewed in this paper, followed a brief introduction on the principle of cold spray. Furthermore, development trends of cold spray in terms of high performance, low cost and additive manufacturing were summarized, involving improvements of spray systems, powders, working gases and off-line path optimization. Finally, challenges and prospects of cold spray were proposed.