Borazon, a boron nitride allotrope, is the fourth hardest substance, after aggregated diamond nanorods, ultrahard fullerite, and diamond, and the third hardest artificial material.
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The most common make up of blade used is either a metal or resin bond containing abrasive grit of natural or more commonly synthetic diamond, or borazon in various forms.
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Borazon is a crystal created by heating equal quantities of boron and nitrogen at temperatures greater than 1800 �Celsius, 3300 �Fahrenheit at 7 gigapascal 1 millionpound-force per square inch.
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CBN-coated grinding wheels, referred to as Borazon wheels, are routinely used in the machining of hard ferrous metals, cast irons, and nickel-base and cobalt-base superalloys.
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Prior to the production of Borazon, diamond was the preferred abrasive used for grinding very hard superalloys but it could not be used effectively on steels because carbon tends to dissolve in iron at high temperatures.
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In 1986, he also received the Man-of-the-Year Award of the Abrasive Engineering Society for contributions to abrasives and grinding technology; he was specifically cited for his invention and development of Borazon.
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Diamonds are specifically renowned as a material with superlative physical qualities they make excellent abrasives because they can be scratched only by other diamonds, Borazon, ultrahard fullerite, or aggregated diamond nanorods, which also means they hold a polish extremely well and retain their billion.
18.
In the diamond-like structure, called cubic boron nitride ( tradename Borazon ), boron atoms exist in the tetrahedral structure of carbons atoms in diamond, but one in every four B-N bonds can be viewed as a coordinate covalent bond, wherein two electrons are donated by the nitrogen atom which acts as the Lewis base to a bond to the Lewis acidic boron ( III ) centre.
