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Knoop hardness

   Also found in: Medical, Wikipedia 0.01 sec.
Knoop hardness [′nüp ‚härd·nəs]
(metallurgy)
The relative microhardness of a material, such as metal, determined by the Knoop indentation test.


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Hardness Ten circular specimens (8 mm in diameter × 2-mm thick) were made of each of the interim materials using a Delrin (DuPont, Wilmington, Delaware) mold, and at 24 hours hardness was measured with a Knoop hardness tester (M-400-G2; LECO, St.
The Mohr or the Knoop hardness scales have been used to compare the hardness of various materials for both materials of construction of the mixer, as well as for the fillers that are being mixed.
4:1, at least 30% weight of the filler film hardener comprising large ceramic particles having an average particle size of at least 14 micrometers and a Knoop hardness of at least 1200.
 
 
 
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