the most common defects

Crack and deformation is one of the most common defects, degreasing degreasing rate must be controlled, and avoid the generation of defects, the imbalance of degreasing rate will lead to the green warp, this is because the green surface temperature is higher, binder was first removal, compact surface area due to the degreasing rate between different binder removal amount is different, can lead to different coefficient of thermal expansion buckling, likewise, skim disequilibrium caused by partial oxidation in the process of volume change will cause the sample warping, thermal degreasing appear crack and deformation in the process of showing the phenomenon of thermal gradient and deformation often concave to the heating area, heat speed when heated binder gasification formed on the surface of the internal pressure often leads to bubble, craze, this is due to internal pressure more than green strength, sometimes internal gas along the injection defects together, therefore, after the degreasing will see the obvious stratification.

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