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A superhard material is a material with a hardness value exceeding 40 GPa, such as diamond, cubic boron nitride, and some ternary compounds. Learn about the definition, mechanics, and classification of superhard materials, and their applications and limitations.
The Mohs scale of mineral hardness is a qualitative ordinal scale that measures scratch resistance of minerals. Diamond is the hardest mineral with Mohs 10, and talc is the softest with Mohs 1. See the table of reference minerals, examples and comparison with other hardness scales.
A comprehensive overview of the 155,063 characters with code points in Unicode version 16.0, covering 168 modern and historical scripts, as well as multiple symbol sets. Includes numeric and character entity references, control codes, and special areas and format characters.
AOL Mail offers features like news, weather, security and spam-blocking for free. You can sign up for an AOL account and access your email on the go with an app or on the web.
Say goodbye to midday hunger with these delicious snacks! These healthy snacks take no more than five minutes to prepare, making them perfect options to whip up when hunger strikes.
The Vickers hardness test is a method to measure the resistance of materials to plastic deformation using a diamond pyramid indenter. It is used for all metals and has a wide scale of hardness values, but it is not a measure of pressure or harshness.
Diamond is the hardest naturally occurring material because of its cubic lattice, in which each carbon atom has four neighbors covalently bonded to it. Diamond's hardness is directional, anisotropic, and dependent on the size and perfection of the crystal, as well as the type of tip used for testing.
Learn how to download, install, or uninstall AOL Desktop Gold, a software that includes email, chat, and more. You'll need Windows 7 or newer and 512 MB of free space on your hard drive.
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