What type of testing machine uses a diamond indenter?

The Vickers testing machine is specifically designed to use a diamond indenter, which gives it unique advantages in materials testing. The diamond, being one of the hardest materials known, allows for precise and accurate indentation into various materials, regardless of their hardness.

Vickers testing operates by applying a specific load to the diamond indenter and measuring the diagonal lengths of the indentation left on the material after the load is removed. The hardness value is then calculated based on the load applied and the size of the indentation. This method is versatile and can be used on a range of materials, from soft to hard, making it widely applicable in industries that require precise hardness measurements.

The Brinell and Rockwell methods utilize different types of indenters (a hardened steel or carbide ball for Brinell and a conical diamond for Rockwell), while Mohs primarily refers to a scale that classifies minerals based on their scratch resistance rather than a testing machine. Therefore, the Vickers method is distinctly characterized by its use of a diamond indenter, setting it apart in hardness testing applications.