Ceramic Elastic Deformation

Understanding elastic deformation is very important in ceramics to eliminate instantaneous brittle fracture at some applied stress levels.

Ceramic elastic deformation.

This causes the distance between atoms in the lattice to increase. Plastic deformation of ceramic materials. Thermodynamically stable cavities can absorb vacancies 37. Deformation can be elastic or plastic.

When a sufficient load is applied to a metal or other structural material it will cause the material to change shape. 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. When an exterior stress is applied to a solid body the body tends to pull itself apart. Each atom tries to pull its neighbor as close as possible.

The fracture stress is usually the same or very close to the elastic limit. This force is known as strain. The complexity of the characters of ceramic materials enhances difficulties of evaluating the effect of various parameters on the plastic behavior of the materials. Grain and grain boundary processes contribute to plastic 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. This change in shape is called deformation. Pores can reduce the load carrying cross section area cause local stress concentrations and lower elastic moduli. Deformation can be elastic or plastic.