| 摘要 |
<p>A multi-layer fiber coating is provided which, in an illustrative embodiment, includes: a ceramic grade Nicalon preform; a silicon carbide coat applied over the fibers; a boron nitride interface coat applied over the silicon carbide coat; wherein the boron nitride coat has a thickness of about 0.5 micron; a silicon carbide coat applied over the boron nitride coat; and wherein the silicon carbide has a thickness of about 2 micron. A multi-layer fiber coating, comprising: a Tyranno Lox-M fiber coated in tow form with 1 micron of silicon carbide by a chemical vapor deposition process and about 1 micron of silicon nitride; a silicon doped boron nitride coat is applied over the about 1 micron of silicon nitride; and wherein the doped boron nitride coat has a thickness of 0.3 micron is also provided. A multi-layer fiber coating, comprising: a T-300 carbon fiber preform; a coat that is graded from PyC to SiC is applied over the T-300 carbon fiber preform; wherein the graded PyC to SiC coat has a thickness of about 1.5 micron; a silicon doped boron nitride interface coat is applied over the graded PyC to SiC coat; wherein the silicon doped boron nitride interface coat has a thickness of about 0.5 micron; and a silicon carbide coat of 2 micron is applied over the silicon doped boron nitride interface coat, is also provided.</p> |
