Preparation method of C/C composite material high-temperature oxidation resistant coating
A high-temperature anti-oxidation and composite material technology, which is applied in the field of high-temperature-resistant coating preparation, can solve the problems of inability to deposit coatings, poor electrical conductivity, and increased difficulty, so as to change the breakdown discharge mechanism, improve electrical conductivity, and reduce costs. Effect
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Embodiment 1
[0039] Configure Y (NO 3 ) 3 with Al(NO 3 ) 3 The molar ratio is 3:1, the total concentration is 1mol / L aqueous solution, add 10g / L nano-silicon powder, high-purity graphite is used as anode, C / C composite material is used as cathode, and the surface area ratio of anode and cathode is 2:1. Such as figure 1 shown. Turn on the pulse power supply and adjust the voltage to 120V, the deposition time is 5min, and the solution temperature is maintained at 20±5°C. After the preparation is completed, put it into a vacuum sintering furnace for sintering, the sintering temperature is 1600° C., and the sintering time is 3 hours. The final coating thickness obtained was 86 μm with a porosity of 14.9%.
Embodiment 2
[0041]The same process as in Example 1 was adopted, the deposition voltage was 150V, the deposition time was 5 min, and the same sintering process as in Example 1 was adopted. The final coating thickness obtained was 88 μm with a porosity of 15.5%.
Embodiment 3
[0043] The same process as in Example 1 was adopted, the deposition voltage was 150V, the deposition time was 10 min, and the same sintering process as in Example 1 was adopted. The final coating thickness obtained was 98 μm with a porosity of 14.9%.
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