Product structure and performance
Silicon carbide (SiC) mainly has two crystal structures, namely cubic β-SiC and hexagonal α-SiC. It is a compound with strong covalent bonds, and the ionic type of its Si--C bond is only 12 %. Therefore, compared with other ceramics, such as alumina and boron carbide, it has better mechanical properties, oxidation resistance, higher wear resistance and lower friction coefficient. In addition, it has good thermal stability and high temperature excellent properties such as high strength, small thermal expansion coefficient, high thermal conductivity, and good thermal shock and chemical corrosion resistance. Therefore, bulletproof SIC ceramics are favored by military experts from various countries.
Bulletproof principle
The basic principle of armor protection is to dissipate the energy of the bullet, slow it down and render it harmless. Most traditional engineering materials, such as metal materials, absorb energy through plastic deformation of the structure, while ceramic materials absorb energy through the process of micro-fracture.
The energy absorption process of silicon carbide bulletproof ceramics can be roughly divided into three stages
（1）Initial impact stage: the bullet hits the ceramic surface, blunts the bullet, and absorbs energy in the process of crushing the ceramic surface to form small and hard fragment areas;
（2）Erosion stage: The blunted bullet continues to erode the fragment area, forming a continuous layer of ceramic fragments
（3）Deformation, crack and fracture stage: Finally, tensile stress is generated in the ceramic to break the ceramic, and then the back plate is deformed. The remaining energy is absorbed by the deformation of the back plate. When the bullet hits the ceramic, both the bullet and the ceramic are destroyed.
KINGCERA Silicon carbide bulletproof ceramic performance parameters
|
Item |
Unit |
SiC |
|
Silicon carbide raw material purity |
% |
≥ 99 |
|
Density |
g/cm³ |
3.10 ~ 3.15 |
|
Hardness |
HV0.5 |
≥ 2600 |
|
Bending strength |
Mpa |
≥ 400 |
|
Elastic Modulus |
Gpa |
400 |
|
Thermal Conductivity |
W/(m•K) |
30 ~ 110 |
|
Temperature resistance |
℃ |
1600 |
|
Compressive strength |
Mpa |
≥ 2200 |
|
Thermal expansion coefficient |
1E-6 /K |
4.0 |
|
Porosity |
% |
< 0.2 |
Application
SIC bulletproof ceramic has obvious advantages in individual soldier bulletproof equipment because of its low density and light weight. It is mostly used in body armor plate and armor for tanks and vehicles.
Product display
Silicon carbide bulletproof ceramic tiles
Multi-curved silicon carbide bulletproof armor plate
SIC bulletproof armor plate
Pressure-less sintered silicon carbide bulletproof tiles
