| 摘要 |
PROBLEM TO BE SOLVED: To provide a melt-inpregnated process for producing a CMC shaped article in a short time, in which a continuous matrix phase is distributed uniformly, the dimension of the article is substantially kept throughout a fabrication process and a further machining is substantially unnecessary for the final article. SOLUTION: The method provides a high degree of dimensional tolerance to the product. A fiber preform is disposed on a surface of a stable formed support having a plurality of indentations on its surface such as grooves, slots, or channels. A precursor of a ceramic matrix material is provided to the fiber preform to infiltrate from both sides of the fiber preform. The inpregnation is conducted under vacuum at a temperature not much higher than the melting point of the precursor. The melt-inpregnated composite article substantially retains its dimension and shape throughout the fabrication process. |
