Three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material and preparation method thereof
A technology of three-dimensional silicon carbide and silicon carbide fiber, which is applied in the field of three-dimensional silicon carbide fiber-reinforced alumina-zirconia composite materials and its preparation, can solve the problem of unsatisfactory deposition characteristics and the absence of three-dimensional silicon carbide fiber prefabricated parts reinforced alumina-zirconia Issues such as research reports on zirconia multiphase ceramic composite materials, to achieve the effects of improving impregnation efficiency and filling degree, high densification efficiency, and good stability
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Embodiment 1
[0042] A method for preparing a three-dimensional silicon carbide fiber reinforced alumina-zirconia composite material of the present invention comprises the following specific process steps:
[0043] (1) Sol selection: select the alumina-zirconia composite sol with a solid phase content of 40wt% as the raw material for the alumina-zirconia composite ceramic matrix, wherein the molar ratio of alumina to zirconia is 1:0.3. Adding HNO to alumina-zirconia composite sol 3 As a stabilizer, HNO 3 The amount added is 30% of the weight of alumina sol.
[0044] (2) Pretreatment of prefabricated parts: The three-dimensional silicon carbide fiber prefabricated part obtained by alternate lamination of silicon carbide fiber cloth and mesh tire was selected as the reinforcement phase, and the volume fraction of fibers in the three-dimensional silicon carbide fiber prefabricated part was 24%. The selected three-dimensional silicon carbide fiber preform was placed under vacuum, the temperat...
Embodiment 2
[0053] A method for preparing a three-dimensional silicon carbide fiber reinforced alumina-zirconia composite material of the present invention comprises the following specific process steps:
[0054] (1) Sol selection: select the alumina-zirconia composite sol with a solid phase content of 30wt% as the raw material for the alumina-zirconia composite ceramic matrix, wherein the molar ratio of alumina to zirconia is 95:5. Adding HNO to alumina-zirconia composite sol 3 As a stabilizer, HNO 3 The addition amount is 25% of alumina sol weight.
[0055](2) Pretreatment of prefabricated parts: The three-dimensional silicon carbide fiber prefabricated part obtained by laminating and suturing silicon carbide fiber cloth is selected as the reinforcement phase, and the volume fraction of fibers in the three-dimensional silicon carbide fiber prefabricated part is 46%. The selected three-dimensional silicon carbide fiber preform is placed under vacuum, the temperature is raised to 1000°C...
Embodiment 3
[0063] A method for preparing a three-dimensional silicon carbide fiber reinforced alumina-zirconia composite material of the present invention comprises the following specific process steps:
[0064] (1) Sol selection: select the alumina-zirconia composite sol with a solid phase content of 35wt% as the raw material for the alumina-zirconia composite ceramic matrix, wherein the molar ratio of alumina to zirconia is 5:95. Adding HNO to alumina-zirconia composite sol 3 As a stabilizer, HNO 3 The amount added is 20% of the weight of alumina sol.
[0065] (2) Pretreatment of the prefabricated part: the three-dimensional silicon carbide fiber prefabricated part with three-dimensional four-way weaving structure is selected as the reinforcement phase, and the volume fraction of the fiber in the three-dimensional silicon carbide fiber prefabricated part is 51%. The selected three-dimensional silicon carbide fiber preform is placed in a high-purity argon atmosphere, the temperature i...
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