Currently, deep-sea exploration and development mainly in diving technology, the use of submersible, underwater robots in the deep sea observation, measurement, sampling, install the necessary instruments and facilities, operations, and other underwater.In order to increase pressure resistance, structural stability dive drag body, diving and underwater robots, and to provide sufficient net buoyancy, people started to develop high-strength solid buoyant material to replace the traditional ball buoyancy and pressure buoyancy tube.High strength solid buoyant material is an important part of modern diving technology, to ensure the buoyancy of submersible, submersible increased payload, reduce its dimensions plays an important role.
When the actual buoyancy material requires long-term immersion in water, the requirements of its water, pressure, corrosion and impact. In particular, for each additional 100m depth in the ocean, the pressure will increase by an object about 10 atmospheres ie 1MPa.Therefore, advanced solid buoyancy material should be both light and strong, that is, in the case of maintaining a low density, a substantial increase in compressive strength, but often reduced density while pressure is also reduced.
