Which carbide is harder than diamond?
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Generally Diamond is the hardest substance on earth. But now Boron carbide or B4C is proven the hardest among all. Boron and carbon react at a high temperature in electric furnace and produce boron carbide.
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Metals like titanium are far less scratch-resistant, and even extremely hard ceramics or tungsten carbide cannot compete with diamonds in terms of hardness or scratch-resistance. ... The structure of boron nitride in its wurtzite configuration is stronger than diamonds.
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