Ceramic armor with controlled pore size dispersion
AssigneeSaint-Gobain Centre De Recherches Et D'Etudes Europeen
InventorsJerome Brulin, Gilles Rossiquet, Matthieu Graveleau
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Abstract
Anti-ballistic armor element, comprising a ceramic body comprising a sintered material consisting of ceramic grains with a Vickers hardness of more than 5 GPa, the total pore volume of said material being between 0.5 and 10%, said ceramic body being characterized in that the cumulative volume of pores with a diameter of between 30 and 100 micrometers represents between 0.2 and 2.5% of the volume of said material, the cumulative volume of pores with a diameter of more than 100 micrometers is less than 0.2% of the volume of said material, the remainder of said total pore volume consisting of pores whose diameter is less than 30 micrometers.
Claims20
An anti-ballistic armor element, comprising a ceramic body comprising a sintered material consisting of ceramic grains with a Vickers hardness of more than 5 GPa, the total volume of the pores of said material being between 0.5 and 10%, said ceramic body being characterized in that:
- the cumulative volume of pores with a diameter of between 30 and 100 micrometers represents between 0.2 and 2.5% of the volume of said material,
- the cumulative volume of pores with a diameter greater than 100 micrometers is less than 0.2% of the volume of said material,
- the rest of said total pore volume consists of pores with a diameter of less than 30 micrometers;
- and
- wherein the distribution by volume of the diameter of the pores of said material is multimodal and comprises at least a first peak with a maximum within a range of pore diameters comprised between 0.1 and 15 micrometers and a second peak with a maximum within a pore diameter interval of between 40 and 80 micrometers.
Dependencies are inferred from the claim text.