Silicon carbide ceramic re-sintering repairing process

Abstract

The invention discloses a silicon carbide ceramic re-sintering repair process, and the process comprises the following steps: placing a silicon carbide ceramic blank to be repaired on a workbench, clamping and fixing, cutting off a damaged part on the blank, and injecting a prepared silicon carbide ceramic slurry raw material serving as a filling material into a cut part of the silicon carbide ceramic blank in a grouting manner; filling and drying the pits at the cutting part, repeating the steps of drying and grouting until the distance between the upper end of the slurry injected at the cutting part and the end surface of the silicon carbide ceramic blank is less than 2 mm, injecting the silicon carbide ceramic slurry into the silicon carbide ceramic blank at a flow rate of less than 3 cm<3> / min, performing the final drying process again, and performing the sintering process. The repair rate is high, so the cost is saved, the product performance is stable, polishing is not needed, and the appearance is consistent with the original appearance.

Description

technical field [0001] The invention relates to the technical field of silicon carbide products, in particular to a refiring and repairing process of silicon carbide ceramics. Background technique [0002] During the production process of silicon carbide ceramic blanks, it is inevitable that some metal or organic impurities will enter, and trachoma, pits, etc. will be formed on the product after sintering. Scrapped, the loss is huge. [0003] In the prior art, the method of silicon carbide ceramics is that the trachoma and the pits with small diameters are filled with supplementary angles, the pits with large angles are scrapped, and the cracks on the surface are polished with a grinder, and then sandblasting after grinding the cracks , This type of technology affects the performance of the product, such as the surface of the product is not smooth enough after polishing, pits will still appear after the glue is used, and the high rate of product scrapping affects the pass r...

AI Technical Summary

Problems solved by technology

[0002] During the production process of silicon carbide ceramic blanks, it is inevitable that some metal or organic impurities will enter, and trachoma, pits, etc. will be formed on the product after sintering. scrapped, huge loss

[0003] In the prior art, the method of silicon carbide ceramics is that the trachoma and the pits with small diameters are filled with supplementary angles, the pits with large angles are scrapped, and the cracks on the surface are polished with a grinder, and then sandblasting after grinding the cracks , this type of technology affects the performance of the product, such as the surface of the product is not smooth enough after polishing, pits will still appear after the glue is used, and the high rate of product scrapping affects the pass rate and cost

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