Three-dimensional carbon fiber prefabricated part enhanced yttrium oxide-zirconium oxide multiphase ceramic composite material and preparation method thereof

Abstract

The invention discloses a three-dimensional carbon fiber prefabricated part enhanced yttrium oxide-zirconium oxide multiphase ceramic composite material and a preparation method thereof. The compositematerial is prepared from a three-dimensional carbon fiber prefabricated part and Y2O3-ZrO2 multiphase ceramic, wherein in the Y2O3-ZrO2 multiphase ceramic, the molar content of ZrO2 is 5%-95%, the Y2O3-ZrO2 multiphase ceramic is uniformly arranged in pores of the three-dimensional carbon fiber prefabricated part, and the porosity of the composite material is 8%-15%. The preparation method comprises the following steps: (1) preparing Y2O3-ZrO2 composite sol; (2) performing soaking; (3) performing drying; (4) performing heat treatment; and (5) repeating the processes of soaking, drying and heat treatment from the step (2) to the step (4). The composite material has the advantages of low porosity, high density, high temperature resistance, oxidation resistance, good mechanical properties and the like; and the preparation method has high preparation efficiency and obviously enhances the density and the mechanical properties of the prepared composite material.

Description

technical field [0001] The invention belongs to the technical field of high temperature-resistant fiber-reinforced ceramic matrix composite materials, and in particular relates to a three-dimensional carbon fiber preform reinforced yttrium oxide-zirconia (Y 2 o 3 -ZrO 2 ) Composite ceramic composite material and its preparation method. Background technique [0002] Y 2 o 3 -ZrO 2 Composite ceramics with Y 2 o 3 and ZrO 2 It has the advantages of high temperature resistance, oxidation resistance, creep resistance and corrosion resistance. At the same time, Y 2 o 3 The introduction of ZrO can inhibit 2 Therefore, it is an excellent high temperature resistant ceramic material, and has been studied more as a thermal barrier coating material. As a monolithic ceramic, Y 2 o 3 -ZrO 2 The fracture toughness of composite ceramics is low, in most cases it is 2-4 MPa m 1 / 2 . Such a low fracture toughness results in the monomer Y 2 o 3 -ZrO 2 Composite ceramics are di...

AI Technical Summary

Problems solved by technology

And for fiber reinforced Y 2 o 3 -ZrO 2 Multiphase ceramic composites are currently suitable for depositing Y 2 o 3 and ZrO 2 The gaseous raw material is too little, and the deposition characteristics are not ideal, while the liquid raw material is relatively easy to obtain, and the performance is reliable.

At present, no three-dimensional carbon fiber preform reinforced Y has been found by liquid phase method. 2 o 3 -ZrO 2 Research Report on Multiphase Ceramic Composites

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