1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
2. Shanghai Shipbuilding Technology Research Institute, Shanghai 200032, China
3. Yantai Research Institute of Harbin Engineering University, Yantai 264010, China
Hollow sphere composite is a kind of light porous material composed of hollow sphere and matrix material through powder metallurgy, casting and other methods. Its uniform distribution of pores provides better properties than conventional porous materials, such as high specific strength, energy absorption, damping, heat insulation and sound insulation. Because of its multiple properties, hollow sphere composites have shown a very broad development space and application prospects in many fields, such as aerospace, armor protection, transportation, shielding protection of nuclear power plants, etc. The properties and preparation technology of hollow sphere and its composites at home and abroad were reviewed in this paper, and the differences in properties of composites prepared by different materials were analyzed as well. Based on the circumstance mentioned above, the difficulties and hotspots that need to be further studied in the field of hollow sphere composite materials were put forward, and the development direction of hollow sphere composite materials in the future was prospected.