Alumina insulating ceramic parts products have good conductivity, mechanical strength and high temperature resistance, thatAlumina insulating ceramic structural partsWhat changes will occur under high temperature conditions?
1. Creep, because insulating alumina ceramic structural parts will be affected by external forces at high temperatures, so over time As the material extends, plastic changes will occur slowly and continuously. This phenomenon can be called creep. The creep of alumina ceramic structural parts is actually closely related to stress and temperature. When the stress increases or the temperature rises, the creep speed also accelerates!
2. Graphitization and spheroidization. Since graphite has relatively low strength and mainly appears in flakes, it will cause the material to be greatly reduced in strength and brittle. It will also increase accordingly, so we call it graphitization; also at high temperatures, the structural parts of alumina ceramics will contain a large amount of cementite, so coarse grained cementite will be formed, and also It will be directly mixed in the ferrite. The main thing is that the cementite will gradually transform from flakes to spherical shape, so we call it spheroidization.
3. Performance after thermal fatigue. If the structural parts of alumina ceramics are exposed to alternating hot and cold working environments for a long time, the material's own errors will occur due to thermal stress. Changes will gradually cause tiny cracks, eventually leading to rupture. If the product needs to work in an environment with large temperature fluctuations, thermal fatigue considerations need to be considered for the structural parts of alumina ceramics!
