The processing hardness and brittleness of alumina have something in common, that is, the hardness is high, but it is very brittle, so it is very difficult to process. How about the processing hardness and brittleness of alumina ceramics with purity? Next, Yuefei Ceramic Factory will give you an analysis.
Alumina ceramics refer to engineering ceramics whose content of alumina is more than 99%. According to the national standard GB/T5593-1999, alumina ceramics have high hardness, high strength, low expansion coefficient, insulation, wear resistance and corrosion resistance, and are widely used in mechanical manufacturing, aerospace, petrochemical and other fields. Alumina ceramic parts are usually formed by isostatic pressure sintering. Because sintering often brings deformation and shrinkage, further finishing is needed to ensure the dimensional accuracy and shape accuracy of the parts. However, alumina ceramics generally have large modulus of elasticity, high hardness, brittleness and strong crack sensitivity. Therefore, the difficulty of mechanical processing mainly lies in the processing hardness and brittleness.