Roughness generally refers to the surface roughness. Surface roughness refers to the unevenness of the processed surface with small gaps and small peaks and valleys. The smaller the surface roughness, the smoother the surface.
Alumina ceramics are not common materials and have relatively high hardness. In order to improve the precision of the product, most alumina materials are further refined after the sintering process is completed.
Due to the excellent properties of alumina ceramic materials, it is necessary to use harder grinding and polishing brick materials such as SIC, B4C or diamond for finishing, and improve the surface of alumina ceramic materials during the finishing process. Lubricity.
The most common method for finishing alumina ceramic materials is to perform surface polishing after stepwise grinding from coarse to fine abrasives. During grinding, Al203 micron powder or diamond paste less than 1μm can be used for grinding and polishing. Of course, the purpose of grinding and polishing alumina ceramics can also be achieved through laser processing and ultrasonic processing.
The surface roughness of alumina ceramics has a great influence on the application of the parts. Generally speaking, the smaller the surface roughness value, the better the fit quality, the less wear and tear, and the longer the service life of the parts, but the higher the processing cost of the alumina ceramics. Therefore, the surface roughness value should be selected accurately and reasonably. When designing a part, the selection of the surface roughness value is determined by the role of the part in the machine.
