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Message * Articles On Superhard Materials, including Boron Nitride, Corundum, Diamond, Lonsdaleite, Sapphire, Ruby, Beta Carbon Nitride, Silicon Carbide, Tungsten Carbide, Graphene, Borazon, Boron Carbide, Tantalum Carbide, Titanium Carbide - 1243270020 - 9781243270023