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Superhard materials: Quiz

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Question 1: Superhard materials are materials possessing hardness exceeding that of commercial polycrystalline cubic ________ (cBN), i.e.
Silicon carbideCarbonBoron trichlorideBoron nitride

Question 2: [1][2] The hardest of them, ________ (HV = 70-150 GPa), found wide application in modern science and technology due to its unique properties.
GarnetGoldPalladiumDiamond

Question 3: Four years after the first synthesis of artificial diamond, cubic ________ cBN was obtained that was found to be second hard phase.
CarbonBoron trichlorideBoron nitrideSilicon carbide







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