| 摘要 |
PURPOSE:To easily produce a preform for a highly load-resistant MMC by forming a buffer layer of ceramic whiskers or short fibers on the surface of a ceramic whisker-reinforced preform. CONSTITUTION:A skeletal preform is formed with a reinforcement consisting of ceramic fibers of SiC, etc. A dispersion of the same or different ceramic whiskers or short fibers and a binder is deposited on the skeletal preform and dried. The diameter of the whisker or short fiber is preferably made larger than that of the whiskers in the sheletal preform, and colloidal silica, etc., are used as the binder. The dispersion concn. is controlled in the treatment to form a buffer layer lower in volume content Vf. The region susceptible to a severe heat load is strengthened in this way, and a preform capable of being appropriately converted to an MMC is obtained. |
