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Carbon nano tube toughened SiBCN(O) metal-based ceramic coating and preparation method thereof

A technology of ceramic coating and carbon nanotubes, which is applied in the field of SiBCN metal-based ceramic coating and its preparation, can solve the problems of complexity and high production cost, and achieve the effects of improving toughness, reducing energy consumption, and improving adhesion

Active Publication Date: 2018-01-05
国科广化(南雄)新材料研究院有限公司 +1
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  • Abstract
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Problems solved by technology

[0005] In order to avoid the deficiencies in the prior art, the primary purpose of the present invention is to provide a method for preparing a SiBCN(O) metal-based ceramic coating toughened by carbon nanotubes. The existing problems of complex process, high production cost and poor toughness improve the compactness of the ceramic coating, save costs and reduce energy consumption

Method used

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  • Carbon nano tube toughened SiBCN(O) metal-based ceramic coating and preparation method thereof

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Embodiment

[0030] A preparation method of SiBCN (O) metal-based ceramic coating, comprising the following steps:

[0031] (1) Preparation of polyborosilazane

[0032] Repeatedly evacuate the Schlenk reaction bottle and fill it with high-purity argon for at least three times to ensure that the air and water in the bottle are completely discharged. Then add 100 ml of anhydrous tetrahydrofuran with a syringe, and then add 10 g of vinyl chlorosilane and 1 g of phenyl chlorosilane. Pass high-purity ammonia gas (99.9999%) at 0-10°C for 2.5 hours, and then react for 2 hours under the protection of argon; distill the solvent under reduced pressure to obtain viscous liquid polysilazane; under the protection of argon , 12.5ml of toluene solution (2M) of borane dimethyl sulfide was slowly added dropwise at 0°C. After the dropwise addition, the temperature was raised to room temperature, reacted for 24 hours, and distilled under reduced pressure to obtain polyborosilazane; the above operations were ...

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Abstract

The invention discloses a carbon nano tube toughened SiBCN(O) metal-based ceramic coating and a preparation method thereof. The preparation method comprises the following steps: ammonolyzing vinyl chlorosilane and phenyl chlorosilane with ammonia, and then carrying out reaction for 1 to 3 hours; removing a solvent through evaporation, thus obtaining liquid polysilazane, and dropwise adding boranedimethyl sulfide for continuous reaction, thus obtaining polyborosilazane; dropwise adding a carbon nano tube solution into the polyborosilazane solution, and carrying out stirring, thus obtaining polymer slurry; coating the surface of a matrix with the slurry, and carrying out pyrolysis at high temperature to obtain the SiBCN(O) metal-based ceramic coating. According to the carbon nano tube toughened SiBCN(O) metal-based ceramic coating disclosed by the invention, the polyborosilazane synthesized by the vinyl chlorosilane, the phenyl chlorosilane and the borane dimethyl sulfide is used as a raw material, and carbon nano tubes are added to prepare the slurry; after immersion coating is carried out, high-temperature pyrolysis is carried out, thus obtaining the high-temperature-resistant andcorrosion-resistant ceramic coating. The process is easy to operate, and the sintering temperature is low; the energy consumption is reduced, and the cost is saved.

Description

technical field [0001] The invention relates to a carbon nanotube toughened SiBCN(O) metal-based ceramic coating and a preparation method thereof. Background technique [0002] Every year, metal corrosion will cause huge economic losses. Ceramic coatings have been used as protective coatings because of their good wear resistance, corrosion resistance, high hardness, and high temperature resistance. However, traditional ceramic coating preparation methods such as CVD, PVD, sol-gel method, thermal spraying, etc. all require large-scale mechanical equipment, consume a lot of energy, and have high costs. In recent years, the method of preparing coatings by cracking ceramic precursor polymers has attracted extensive attention. [0003] SiBCN ceramics have good high temperature stability, oxidation resistance and suitable mechanical strength, and have good chemical compatibility with various inorganic fiber reinforcements and ceramic matrix. Studies have shown that this quaterna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/58C04B35/622
Inventor 王斌冯颖
Owner 国科广化(南雄)新材料研究院有限公司
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