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of a material. It is a three-sided pyramid which is geometrically self-similar. The popular
Berkovich now has a very flat profile, with a total included angle of 142.3° and a half angle of 65.27°, measured from the axis to one of the pyramid flats. This Berkovich tip has the same projected
56:. The original tip shape was invented by Russian scientist E. S. Berkovich in the USSR around 1950, which has a half angle of 65.03°.
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M. M. Khrushchov & E. S. Berkovich, "Methods of
Determining the Hardness of Very Hard Materials: The Hardness of Diamond",
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As it is three-sided, it is easier to grind these tips to a sharp point and so is more readily employed for
104:, 1950 (2), p. 193–196 (in Russian). Translated into English by W. G. C. and published in
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87:, Vol. 16, #3, 1950, p. 345–347 (in Russian). Translated into English and published in
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tests. It is typically used to measure bulk materials and films greater than 100 nanometres (3.9
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E. S. Berkovich, "Three-Faceted
Diamond Pyramid for Micro-hardness Testing",
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91:, Vol. 11, No. 127, June 1951, p. 129–132.
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108:, Vol. 11, Feb 1951, p. 42–49 (in English).
20:A Berkovich tip, with "a" denoting the half angle
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32:image of a Berkovich tip used in a
131:. You can help Knowledge (XXG) by
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30:scanning electron microscope
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106:Industrial Diamond Review
89:Industrial Diamond Review
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102:Zavodskaya Laboratoria
85:Zavodskaya Laboratoria
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49:indentation hardness
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