Ceramic Hardness Hv

Vickers hardness is a resistance value obtained by pressing a diamond indenter onto a test specimen.

Ceramic hardness hv.

20 indicates the loading time if it differs from 10 s to 15 s. For example a new astm zirconia specification for surgical implants f 1873 98 stipulates that vickers hardness hv shall be no less than 11 8 gpa 1200 kgf mm 2 at a load of 9 8 n 1 kgf. The method for measuring the hardness of fine ceramics is defined in jis r 1610 iso 14705. Metals ceramics are harder than others e g.

This has led to the use of fine ceramics in. Hardness is an important parameter correlating with wear resistance of the mate. Hv 1 854 f d. 440hv30 or xxxhvyy zz if duration of force differs from 10 s to 15 s e g.

Vickers hardness numbers are reported as xxxhvyy e g. Extreme hardness is the primary feature that endows fine ceramics with their superior wear resistance. In fact many ceramic specifications list minimum hardness requirements. Often hardness of ceramic material as with other materials is directly equated to wear resistance.

Where f applied load kg. Vickers hardness calculator hardness is a measure of the resistance of a material to plastic deformation induced by applied forces. 440 is the hardness number hv gives the hardness scale vickers 30 indicates the load used in kgf.