Ceramic Elastic Deformation

The fracture stress is usually the same or very close to the elastic limit.

Ceramic elastic deformation.

Pores can reduce the load carrying cross section area cause local stress concentrations and lower elastic moduli. Thermodynamically stable cavities can absorb vacancies 37. This force is known as strain. A temporary shape change that is self reversing after the force is removed so that the object returns to its original shape is called elastic deformation.

Understanding elastic deformation is very important in ceramics to eliminate instantaneous brittle fracture at some applied stress levels. When a sufficient load is applied to a metal or other structural material it will cause the material to change shape. This causes the distance between atoms in the lattice to increase. Author links open overlay panel philip c dokko joseph a pask.

There axe very few ceramic materials free of pores that are also free of a glassy phase which 81 was present as a liquid during firing. The complexity of the characters of ceramic materials enhances difficulties of evaluating the effect of various parameters on the plastic behavior of the materials. Each atom tries to pull its neighbor as close as possible. This change in shape is called deformation.

Grain and grain boundary processes contribute to plastic strain. This causes a force trying to resist the deformation. Deformation can be elastic or plastic. Plastic deformation of ceramic materials.