Ceramic Hardness Testing

The hardness of fine ceramics is generally indicated using a vickers hardness number.

Ceramic hardness testing. Hardness testing is frequently used for characterizing mechanical properties of engineering ceramics. Vickers hardness is a resistance value obtained by pressing a diamond indenter onto a test specimen. Its value helps to characterize resistance to deformation densification and fracture. The pencil scale is a test of hardness that helps to explain to consumers how hard the ceramic coating will be once it s cured to the surface.

The method for measuring the hardness of fine ceramics is defined in jis r 1610 iso 14705. Hardness is a representation of a material s resistance to localised plastic deformation. The purpose of hardness testing for ceramic coatings. An indenter of well defined geometry is pressed into the surface of the sample under a.

The grading of the scale ranges from 0 to 9 and the h indicates the hardness of that specific grade. In this test a pyramidal diamond indenter is pressed into a polished surface under known loading conditions and the size of the indentation is related to the hardness of the material. Hardness is one of the most frequently measured properties of a ceramic.