How is the roughness of alumina ceramics processed?

Release time：2024-09-11click：0

Roughness generally refers to surface roughness. Surface roughness refers to the unevenness of the machined surface with small spacing and tiny peaks and valleys. The smaller the surface roughness, the smoother the surface.

Alumina ceramic is not an ordinary material, it has relatively high hardness. In order to improve the accuracy of the product, most alumina materials are further refined after completing the sintering process.

Due to the good properties of alumina ceramic materials, it is necessary to use harder grinding and polishing brick materials for finishing, such as SIC, B4C or diamond, etc.; and during the finishing process, the surface of alumina ceramic materials must be improved in advance. lubricity.

In the finishing of alumina ceramic materials, the most common method is to grind step by step from coarse to fine abrasives, and then perform surface polishing. During polishing, Al203 micron powder or diamond paste smaller than 1 μm can be used for grinding and polishing. Of course, laser Machining and ultrasonic processing can also achieve the purpose of grinding and polishing alumina ceramics.

The surface roughness of alumina ceramics has a great impact on the use of parts. Generally speaking, a small surface roughness value will improve the fit quality, reduce wear, and extend the service life of parts, but the processing cost of alumina ceramics will increase. Therefore, the surface roughness value must be selected correctly and reasonably. When designing parts, the choice of surface roughness value is determined by the role of the part in the machine.

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