Buoyancy material constructed of metallic spheres and syntactic foam

摘要

The formation of pressure resistant buoyancy structures (20) with a given buoyancy efficiency at smaller sizes comprising embedding into syntactic foam, metallic spheres (10) which are substantially hollow and comprise high strength, high performance, light weight metal alloys which can be precision forged. The weight per unit space of the metallic spheres (10) is less than that of the syntactic foam. As a result, the metallic spheres can decrease the size of the structure required to achieve desired buoyancy efficiency.