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  2. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)

  3. Knoop hardness test - Wikipedia

    en.wikipedia.org/wiki/Knoop_hardness_test

    The Knoop hardness test / k ə ˈ n uː p / is a microhardness test – a test for mechanical hardness used particularly for very brittle materials or thin sheets, where only a small indentation may be made for testing purposes.

  4. Indentation hardness - Wikipedia

    en.wikipedia.org/wiki/Indentation_hardness

    Vickers hardness test (HV) Knoop hardness test (HK) In microindentation testing, the hardness number is based on measurements made of the indent formed in the surface of the test specimen. The hardness number is based on the applied force divided by the surface area of the indent itself, giving hardness units in kgf/mm 2. Microindentation ...

  5. Hardnesses of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Hardnesses_of_the_elements...

    Mohs hardness of materials (data page) Vickers hardness test; Brinell scale This page was last edited on ...

  6. Ceramography - Wikipedia

    en.wikipedia.org/wiki/Ceramography

    The hardness of a material can be measured in many ways. The Knoop hardness test, a method of microindentation hardness, is the most reproducible for dense ceramics. The Vickers hardness test and superficial Rockwell scales (e.g., 45N) can also be used, but tend to cause more surface damage than Knoop. The Brinell test is suitable for ductile ...

  7. Superhard material - Wikipedia

    en.wikipedia.org/wiki/Superhard_material

    At such low load, the hardness values are also overestimated for other materials, for example it exceeds 100 GPa for c-BN. [4] Other researchers, while having reproduced the high ReB 2 hardness at low load, reported much lower values of 19–17 GPa at a more conventional load of 3–49 N, that makes ReB 2 a hard, but not a superhard material ...

  8. Category:Hardness tests - Wikipedia

    en.wikipedia.org/wiki/Category:Hardness_tests

    Pages in category "Hardness tests" The following 27 pages are in this category, out of 27 total. ... Knoop hardness test; Korsunsky Work-of-Indentation Approach; L.

  9. Boron nitride - Wikipedia

    en.wikipedia.org/wiki/Boron_nitride

    Knoop hardness (GPa) 10 45 34 100 Bulk modulus (GPa ... Direct conversion of hexagonal boron nitride to the cubic form has been observed at pressures between 5 and ...