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a number indicative of the degree of relative hardness of a material, calculated from the load employed and the length of the long axis of the impression made by the rhomboidal pyramid of a diamond pressed into the surface of the material being tested. It is the test most commonly used in dental practice to test the hardness of teeth.Medical dictionary. 2011.
Knoop hardness number (HK) — Knoop hardness number (HK). См. Число твердости по Кнупу. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) … Словарь металлургических терминов
hardness number — a number indicative of the degree of relative hardness of materials. See Brinell, Knoop, Rockwell, and Vickers hardness n … Medical dictionary
number — 1. A symbol expressive of a certain value or of a specific quantity determined by count. 2. The place of any unit in a series. atomic n. (Z) the n. of protons in the nucleus of an atom; it indicates the position of the … Medical dictionary
Indentation hardness — tests are used to determine the hardness of a material to deformation. Several such tests exist, wherein the examined material is indented until an impression is formed; these tests can be performed on a macroscopic or microscopic scale. When… … Wikipedia
Vickers hardness test — A Vickers hardness tester The Vickers hardness test was developed in 1924 by Smith and Sandland at Vickers Ltd as an alternative to the Brinell method to measure the hardness of materials.[1] The Vickers test is often easier to use than other… … Wikipedia
Vickers hardness — ▪ mineralogy a measure of the hardness of a material, calculated from the size of an impression produced under load by a pyramid shaped diamond indenter. Devised in the 1920s by engineers at Vickers, Ltd., in the United Kingdom, the diamond … Universalium
KHN — • Knoop hardness number … Dictionary of medical acronyms & abbreviations
Число твердости по Кнупу — Knoop hardness number (HK) Число твердости по Кнупу. Число, относящееся к приложенной нагрузке и к расчетной площади, определяемой из постоянного выражения, составленного для ромбического пирамидального алмазного индентора, имеющего внутренние… … Словарь металлургических терминов
test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… … Medical dictionary
KHN — Abbreviation for Knoop hardness number. * * * Knoop hardness number … Medical dictionary
