The metal material is a material of zirconia ceramics , but many people do not know what happens to the metal material without elasticity or deformation? The editor of Mingjue Ceramics introduces the difference between elasticity and deformation of zirconia ceramics and metal materials:
If it is a metal material, under static tensile load at room temperature, it generally undergoes two stages of elastic deformation and plastic deformation before fracture; however, this is not the case for zirconia ceramic materials, and it generally does not occur in the plastic deformation stage. Brittle fracture occurs immediately after elastic deformation with a small strain, and the elongation and area shrinkage are almost zero.
Although zirconia ceramic is a material that is not easy to separate, it will undergo a certain deformation under a certain external force, and this deformation is reversible, that is, once the external force on the zirconia ceramic is removed, it can Restore the original shape.
Tests prove that the elastic modulus of zirconia ceramics is much greater than that of metals, and the elastic modulus of zirconia ceramics is not only combined with The bond is also related to the type, distribution ratio and porosity of the constituent phases, because the forming and sintering process of ceramics has a great impact on the elastic modulus.
As far as metal materials are concerned, even very brittle cast iron has good tensile strength, but zirconia ceramics are different, so Its elastic modulus when compressed is much higher than its elastic modulus when stretched, and it can produce a small amount of compressive plastic deformation.
As a brittle material, Zirconium oxide ceramics are much stronger when compressed than when stretched; and compared to metallic materials, it It has good resistance to creep at high temperatures, and also has certain plasticity at high temperatures, so zirconia ceramic materials can be applied in high temperature environments.