Patent ID: 7402541
Filing Date: 2008-07-22
Classification: C04B,F41H

Abstract:
1. A shock-absorbing panel comprising a single internal layer of ceramic bodies which are directly bound and retained in plate form by a solidified materials such that the ceramic bodies are arranged in a single layer of adjacent rows and columns wherein a majority of each of said ceramic bodies is substantially in direct contact with at least four adjacent bodies, wherein said ceramic bodies are formed from sintered material comprising silicon nitride and tungsten carbide, in which the silicon nitride content is a minimum of about 80% and wherein the total nitride component is about 28-40 w/w % N 2 , and further comprising about 1.5-3.5 w/w % Al, about 2-6 w/w % Y, about 1.5-7 w/w % W, and about 3-9 w/w % O2, which after sintering will produce ceramic bodies with a high degree of toughness suitable for armor applications.