Difference between revisions of "Knoop hardness scale"
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | Knoop- | + | Knoop-Härte (Deut.) |
== Authority == | == Authority == | ||
| − | * | + | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 |
| − | * | + | * Theodore J. Reinhart, 'Glossary of Terms', ''Engineered Plastics'', ASM International, 1988 |
| − | * | + | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 |
| − | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: Knoop Hardness." | + | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: Knoop Hardness." Encyclopædia Britannica. 8 Sept. 2004 . |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 06:55, 24 July 2013
Description
A hardness scale based on measuring indentations that was developed in 1939 by F. Knoop, a 20th century chemist. The Knoop hardness scale ranges from glass (300-600) to diamond (6000-6500). A Knoop hardness tester drops a pointed diamond indentor onto a material then examines the size and depth of the indentation to determine surface hardness. This test is generally used on brittle materials like ceramics.
Synonyms and Related Terms
Knoop-Härte (Deut.)
Authority
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
- Theodore J. Reinhart, 'Glossary of Terms', Engineered Plastics, ASM International, 1988
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Encyclopedia Britannica, http://www.britannica.com Comment: Knoop Hardness." Encyclopædia Britannica. 8 Sept. 2004 .