Ceramic reinforcement material

Abstract

The present invention provides a ceramic reinforcement material with a weak interface. The reinforcement material of the present invention contains several ceramic layers, wherein those ceramic layers can be a ceramic layer, a metal layer or a polymer layer. The present invention utilizes the bonding weakness of a middle layer or in between a middle layer and the ceramic layer to create a weak interface in the ceramic reinforcement material. The reinforcement with the weak interface can be added into other materials to improve their toughness.

1 . A ceramic reinforcement material with a weak interface, capable of adding into a matrix in order to improve the toughness of the matrix, comprising 
 a first reinforcement material, wherein the first reinforcement material is a ceramic material;    a weak interface, wherein strength of the weak interface is lower than that of the first reinforcement material, the weak interface can be either a second reinforcement material covered under the first reinforcement material or a defected region existed inside the first reinforcement material.    
   
   
       2 . The ceramic reinforcement material of  claim 1 , wherein the second material is made of a combination of a ceramic material, a metal material or a polymer material.  
   
   
       3 . The ceramic reinforcement material of  claim 1 , wherein the weak interface is formed with the second reinforcement material and can deflect a crack formed and spread in the matrix.  
   
   
       4 . The ceramic reinforcement material of  claim 1 , wherein the weak interface is formed between the first reinforcement material and the second reinforcement material so that the weak interface can deflect a crack formed and spread in the matrix.  
   
   
       5 . The ceramic reinforcement material of  claim 1 , wherein the first reinforcement material and the second reinforcement material are stacked alternatively to form a multi-layer structure.  
   
   
       6 . The ceramic reinforcement material of  claim 1 , wherein the defected region can be a porous layer or a defected layer within the first reinforcement material, or a grain boundary between crystalline grains.  
   
   
       7 . The ceramic reinforcement material of  claim 1 , wherein a plurality of defected regions are formed in the first reinforcement material.  
   
   
       8 . The ceramic reinforcement material of  claim 1 , wherein the defected region and the first reinforcement material are stacked alternatively to form a multi-layer structure.