Patent · US Active

Armour plate

US11635281B2 · kind B2 · utility

0Cited by

6References

27Claims

0Family size

Assignee

SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN · FR

Inventors

Malte MOELLER · Regensburg, DE
Gilles Rossiquet · Cognac, FR

Key dates

Filing date	Jul 7, 2017
Grant date	Apr 25, 2023
Priority date	—
Expiry date	Aug 20, 2040

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF41H7/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Antiballistic armour plate includes a ceramic body including a hard material, provided, on its inner face, with a back energy-dissipating coating. The ceramic body is monolithic. The constituent material of the ceramic body includes grains of ceramic material having a Vickers hardness that is higher than 15 GPa, and a matrix binding the grains, the matrix including a silicon nitride phase and/or a silicon oxynitride phase, the matrix representing between 5 and 40% by weight of the constituent material of the ceramic body. The maximum equivalent diameter of the grains of ceramic material is smaller than or equal to 800 micrometres. The constituent material of the ceramic body has an open porosity that is higher than 5% and lower than 14%. The metallic silicon content in the material, expressed per mm of thickness of the body, is lower than 0.5% by weight.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.