Hard materials

Japanese: 硬質材料 - こうしつざいりょう
Hard materials
Carbides, nitrides, borides, and some oxides have extremely high hardness. Materials that utilize this property are collectively called hard materials. Materials in practical use include diamond (C), silicon carbide (SiC), boron carbide (B 4 C), titanium carbide (TiC), tungsten carbide (WC), boron nitride (cubic) BN, titanium nitride (TiN), silicon nitride (Si 3 N 4 ) , aluminum nitride (AlN), and alumina (Al 2 O 3 ) . The hardness of a material can be thought of as the degree of resistance to forces that attempt to deform it.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
炭化物,窒化物,ホウ化物,ある種の酸化物には硬さの非常に高いものがある。この性質を利用する物質を総称して硬質材料という。実用されているものにダイヤモンドC,炭化ケイ素SiC,炭化ホウ素B4C,チタンカーバイドTiC,炭化タングステンWC,窒化ホウ素(立方晶)BN,窒化チタンTiN,窒化ケイ素Si3N4,窒化アルミニウムAlN,アルミナAl2O3などがある。物質の硬さは,変形させようとする力に対する抵抗の大小と考えてよい。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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