Metal materials are a kind of zirconia ceramics, but many people do n’t know what happens if the metal materials are not elastic or deformed. The following is an introduction by zirconia ceramics and metal materials to Difference in deformation:

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 show plastic deformation. At this stage, brittle fracture occurs immediately after the elastic deformation with extremely 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 return to its original shape.

The test proves that the elastic modulus of zirconia ceramic materials is much greater than that of metals, and the elastic modulus of zirconia ceramic materials is not only related to the bonding bond, but also to the type, distribution ratio and porosity of their constituent phases, because The forming and sintering process of ceramics has a great influence on the elastic modulus.

As far as metallic 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 that when stretched. A small amount of compression plastic deformation can be produced.

As a brittle material, the strength of zirconia ceramics is much greater when it is compressed than when it is stretched; and compared with metal materials, it has good resistance to creep at high temperatures and also has high temperatures. Certain plasticity, so zirconia ceramic materials can be used in high temperature environments.