The United States scientists proposed that the incorporation of nanomaterials 'white graphene' in ceramic materials can greatly enhance the strength, toughness and heat resistance, radiation resistance and other capabilities of ceramic materials and has the potential to be used in high performance composite materials such as nuclear industry and aerospace. field.
White graphene is an alias for hexagonal boron nitride. It is a member of a two-dimensional material family that has a similar structure to graphene and is an ultra-thin plane made up of hexagonal meshes. Unlike graphene, however, the atoms Not a carbon atom but a nitrogen atom and a boron atom.
Scientists at the Rice University in the United States said they analyzed in detail the combination of white graphene and tobermorite, an aqueous calcium silicate crystal that has a layered structure that can be used to produce ceramics and cement. An atomic thick white graphene layer can be inserted horizontally between the layers of tobermorite to form a strong sandwich structure.
The simulation results show that the white graphene layer can release the force of the composite material to three times higher than tobermorite, and the stiffness, that is, the resistance to elastic deformation is about 25% higher than that of ordinary ceramic materials Fragmentation.In addition, the material heat resistance and radiation resistance has also been significantly improved.
Relevant papers recently published in the Journal of Applied Materials and Interface, American Chemical Society.Researchers said that this idea can be used to design a new multi-functional composite materials, other two-dimensional materials may have similar effects.
