Method for charging open pores in ceramic matrix composite, and ceramic matrix composite

A method for charging open pores in a ceramic matrix composite including a matrix and reinforcing fibers provided in the matrix, the method being for charging, with ceramic derived from a liquid material, the open pores formed in the matrix of the ceramic matrix composite, so that the ceramic comes to constitute the matrix, wherein the method comprises:

• a step (A) of, in an arranged state where the ceramic matrix composite is arranged in the liquid material serving as a matrix material, heating the ceramic matrix composite, thereby bringing the liquid material into a film-boiling state such that the ceramic derived from the liquid material is generated in the open pores;
• a step (B) of, in the arranged state, cooling the ceramic matrix composite;
• and
• repeating the step (A) and the step (B) in the arranged state, thereby charging the open pores with the ceramic, wherein the repeating the step (A) and the step (B) includes:
• raising the temperature of the ceramic matrix composite by heating the ceramic matrix composite at the step (A);
• starting the step (B) at a timing that the temperature of the ceramic matrix composite becomes equal to or higher than a high-side target temperature in course of raising the temperature of the ceramic matrix composite at the step (A);
• lowering the temperature of the ceramic matrix composite by cooling the ceramic matrix composite at the step (B);
• and
• starting the step (A) again at a timing that the temperature of the ceramic matrix composite becomes equal to or lower than a low-side target temperature in course of lowering the temperature of the ceramic matrix composite at the step (B), wherein the low-side target temperature is lower than a boiling point of the liquid material.