Knoop hardness scale

From CAMEO
Jump to navigation Jump to search

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

Retrieved from "https://cameo.mfa.org/index.php?title=Knoop_hardness_scale&oldid=45162"