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Nanoindenter for hardness testing
Nanoindenter for hardness testing. This nanoindenter (bottom left) determines a material's hardness by measuring its resistance to forces exerted on it by a harder material. It uses a fine tip made from a very hard material, such as diamond, to produce an indentation that is only a few nanometres (billionths of a metre) in size. An atomic force microscope (AFM, top right) is then used to examine how the test material has responded to the exerted forces Photographed at the National Physical Laboratory, Teddington, UK.
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