Silicon carbide fiber material with rare earth modified lanthanum phosphate coating, and preparation method and application thereof
A technology of silicon carbide fiber and rare earth modification, applied in the field of inorganic non-metallic surface treatment, can solve problems such as performance degradation and SiC fiber degradation, achieve wide application prospects and overcome the effect of degradation performance degradation
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0031] Further, in order to further improve the 4 The physical properties and oxidation resistance of the coated silicon carbide fiber. In some embodiments of the present invention, the preparation method may specifically include:
[0032] S1. Deposit a layer of rare earth modified lanthanum phosphate coating in situ on the surface of the silicon carbide fiber by hydrothermal method, and then dry it.
[0033] Specifically, in some embodiments, the in-situ deposition of a layer of rare earth modified lanthanum phosphate coating on the surface of the silicon carbide fiber by hydrothermal method includes: immersing the silicon carbide fiber in a layer containing La 3+ , rare earth ions and modifiers in phosphoric acid solution for hydrothermal treatment.
[0034] Among them, containing La 3+ The preparation step of the phosphoric acid solution of the rare earth ions and the modifying agent may include: mixing the solution obtained by mixing the lanthanum compound, the rare eart...
Embodiment 1
[0057] (1) Cook the SiC fibers with boiling water for more than 30 minutes, then place the SiC fibers in an oven at 120°C to dry for more than 30 minutes to remove the moisture on the surface of the fibers, then move the fibers into an atmosphere furnace with nitrogen as a protective gas to ensure that the oxygen partial pressure is not high. At a pressure higher than 0.05 standard atmosphere, treat at 1000°C for 2 hours, and then take out the SiC fiber after cooling with the furnace.
[0058] (2) La(NO 3 ) 3 ·6H 2 O, Ce(NO 3 ) 3 ·6H 2 O is configured into a solution of 100mL at a molar ratio of 9:1, where La 3+ The concentration is 1mol / L, add 5mL triethylenetetramine, mix well, put the solution in the refrigerator at 4℃ for more than 8h; 3 PO 4 Prepare 100 mL of a solution with a concentration of 1 mol / L, and place it in a refrigerator at 4°C for more than 8 hours. After mixing the above two solutions evenly, immerse the SiC fiber in the mixed solution, and move it i...
Embodiment 2
[0063] (1) Cook the SiC fiber with boiling water for more than 30 minutes, place the SiC fiber in an oven at 120°C to dry for more than 30 minutes to remove the moisture on the surface of the fiber, and then move the fiber into the atmosphere furnace with nitrogen as the protective gas to ensure that the oxygen partial pressure is At 0.01 standard atmospheric pressure, treat at 1000°C for 2 hours, and then take out the SiC fiber after cooling in the furnace.
[0064] (2) LaCl, YCl 3 According to the molar ratio of 19:1, it is configured into a solution of 100mL, in which La 3+ The concentration is 1mol / L, add 0.2g cetyltrimethylammonium bromide, mix well and put the solution in a refrigerator at 4°C for more than 8h; 3 PO 4 Prepare 100 mL of a solution with a concentration of 1 mol / L, and place it in a refrigerator at 4°C for more than 8 hours. After mixing the above two solutions evenly, immerse the SiC fiber in the mixed solution, and move it into the ultrasonic cleaning ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| melting point | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More