Method for uniformly introducing ultrahigh-temperature ceramic component to braided three-dimensional carbon fibers with high content

A method for uniformly introducing an ultrahigh-temperature ceramic component to braided three-dimensional carbon fibers with high content. The invention belongs to the field of ultrahigh temperaturestructural materials and solves the problems of non-uniform distribution and low content of the ultrahigh-temperature ceramic component in the similar methods in the prior art. The method includes following steps: 1) mixing ultrahigh-temperature ceramic powder with anhydrous ethanol and polyacrylic acid to obtain ultrahigh-temperature ceramic slurry; 2) injecting the ceramic slurry into interior of the braided carbon fiber via an injection apparatus and performing ultrasonic vibration, and continuously injecting the slurry to complete vibration-assisted slurry injection process; 3) adding theultrahigh-temperature ceramic slurry and a green body to a reactor, performing vacuum impregnation and then ultrasonic vibration to complete vibration-assisted ultrasonic vibration. Through compositeprocess of the vibration-assisted slurry injection process and the vibration-assisted ultrasonic vibration, the ceramic slurry can be completely and uniformly dispersed in carbon fiber frameworks under effect of the ultrasonic high-frequency vibration. The product is high in ceramic content and is short in process period.