Patent ID: 9732005
Date: 2017-08-15
CPC Classifications: C04B,C23C

Claim:
1. A method for forming in situ a boron nitride reaction product locally on a reinforcement phase of a ceramic matrix composite material, said method comprising: providing a ceramic matrix composite material having a fiber reinforcement material; providing a B4C material and a Si3N4 material and depositing a layer of said B4C material and a layer of said Si3N4 material on said fiber reinforcement material wherein said layer of said B4C material and said layer of said Si3N4 material are deposited sequentially; and heating said B4C material and said Si3N4 material to a temperature above 1200 degrees Centigrade to form a hexagonal boron nitride reaction product in situ on the fiber reinforcement material by the reaction between B4C and Si3N4.