Several indenter geometries are used in nanoindentation tests. The most common is the Berkovich indenter, which is a three-sided pyramid, with the face angle to normal equal to 65.3°. This indenter has the advantage of being well suited to obtain mechanical properties at a small depth since it is possible to obtain indenters with a relatively sharp end, and at the same time, a good relation contact area to depth. Other indenters commonly used are Vickers, conical, spherical, cube-corner, and the flat-end shape. Each one of these indenters has some advantages and disadvantages. Indenters with different shapes are normally used to obtain mechanical properties diverse from hardness and elastic modulus, although these properties can also be obtained using inden-ters with a geometry other than Berkovich.
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