Sclerometer
Encyclopedia
The sclerometer, also known as the Turner-sclerometer (from meaning "hard"), is an instrument used by mineralogists to measure the scratch hardness of materials. It was invented by Prof. Thomas Turner
in 1896.
The Turner-sclerometer test consists in measuring microscopically the width of a scratch made by a diamond
under a fixed load, and drawn across the face of the specimen under fixed conditions.
Thomas Turner
Thomas Turner may refer to:*Thomas Turner , U.S. Congressman from Kentucky, 1877–1881*Thomas Turner , Anglican dean*Thomas Turner , 18th century English diarist...
in 1896.
The Turner-sclerometer test consists in measuring microscopically the width of a scratch made by a diamond
Diamond
In mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions...
under a fixed load, and drawn across the face of the specimen under fixed conditions.