Manufacturing method for ceramic matrix composite

A manufacturing method for a ceramic matrix composite having a woven fabric that has a plurality of fiber bundles containing one of first components selected from alumina, mullite, and SiC and a matrix containing one of second components selected from alumina, mullite, and SiC and is disposed in a gap between the plurality of fiber bundles, the method comprising:

• a green body formation step of forming a green body by infiltrating the woven fabric with a polymer blend including a polymer having —Al—O— linkage and a polymer having —Al—O—Si—O linkage as a precursor of the matrix and performing sintering;
• and
• a densification step of further infiltrating the green body with the polymer blend and performing sintering,
• wherein the densification step includes
• an infiltration step of further infiltrating the green body with the polymer blend to form an infiltrated green body,
• a drying step of drying the infiltrated green body to form a dried green body,
• after the drying step, a steam treatment step of leaving the dried green body under a saturation water vapor pressure to increase infiltration of the polymer blend into the dried green body by intermolecular condensation of adjacent oxo groups in the polymer blend and intramolecular condensation of the oxo groups in the polymer blend to form a crosslink containing —Al—O—Al— linkages and a three-dimensional network, thereby, forming a treated green body,
• a first determination step of determining whether or not the steam treatment is sufficiently progressing in the treated green body, and
• a sintering step of sintering the treated green body,
• after the steam treatment step, in response to the steam treatment being determined not sufficiently performed in the first determination step, the infiltration step, the drying step, and the steam treatment step are repeated, and in the sintering step, the treated green body for which the infiltration step, the drying step, and the steam treatment step have been repeated a plurality of times is calcined.