Method for fabricating ceramic material

摘要

A method for a fabricating a ceramic material includes providing a mixture of a reactive metallic filler material with a preceramic polysilazane material. The preceramic polysilazane material is then polymerized to form a green body. The green body is then thermally treated in an environment that is substantially free of oxygen to convert the polymerized preceramic polysilazane material into a ceramic material that includes at least one nitride phase that is a reaction product of the reactive metallic filler material and a preceramic polysilazane material.

主权项

1. A method for fabricating a ceramic material, the method comprising:
proving a mixture of a reactive filler with a preceramic polysilazanes material, wherein the reactive filler is selected from the group consisting of aluminum filler metal powder, titanium filler metal powder and combinations thereof; and wherein the mixture has an amount of up to 40 weight percent of reactive filler; infiltrating the mixture into pores of a fibrous structure that has coated fibers, wherein the coating on the coated fibers has an coating thickness, represented as a variable tcoating (nanometers) and the mixture has an amount, represented by a variable X (weight percent), of the reactive filler, and wherein X and tcoating are selected such that a ratio of tcoating/X (coating thickness in nanometers divided by weight percent of the reactive filler) is from 3.75 to 25; polymerizing the preceramic polysilazanes material to form a green body; and thermally treating the green body in an environment that is substantially free of oxygen to convert the polymerized preceramic polysilazane material into a ceramic material including at least one nitride phase that is a reaction product of the reactive filler and the preceramic polysilazane material.