What are the material performance requirements for bulletproof ceramics
Due to the brittleness of the ceramic itself, it fractures rather than plastically deforms when impacted by projectiles. First, under the action of the winch, fracture occurs at inhomogeneous places such as bridges and grain boundaries. Therefore, to minimize stress concentrations, armor ceramics should be high-quality ceramics with low porosity (up to 99% of theoretical density values) and fine-grained structures.
Material properties and their impact on ballistic performance↓↓↓
Density: the mass of the armor system
Destruction of projectiles
Modulus of elasticity: supply of elastic waves
Strength: Resistance to multiple hits
Fracture toughness: resistance to multiple blows
Fracture mode (intergranular or intergranular): Ability to absorb energy
Minimum structure (grain size second phase phase transition or non-grain (action induction) pores):
Affects all properties described in the left column
Bulletproof ceramic material systems, the most commonly used ones, include silicon carbide, boron, silicon carbide, titanium boride, etc. Among them, ceramics (Al2O3), silicon carbide ceramics (SiC), and boron carbide ceramics (B4C) are the most widely used . .