超硬材料（Superhard Material）是指硬度特别高的材料，可分为天然以及人造两种，前者主要包括天然的钻石（金刚石），后者则包括人造聚晶金刚石(PCD)、化学气相沉积金刚石(CVDD)，以及现在研究较多的多晶立方氮化硼(PCBN)等。

A superhard material is a material with a hardness value exceeding 40 gigapascals (GPa) when measured by the Vickers hardness test. They are highly incompressible solids with high electron density and high bond covalency. As a result of their unique properties, these materials are of great interest in many industrial areas including, but not limited to, abrasives, polishing and cutting tools and wear-resistant and protective coatings.