| 摘要 |
A CVD diamond layer for use as an insert in an abrasive tool characterised by the following features: (i) the layer contains boron dopant atoms in a concentration of at least 0,05 atomic percent; (ii) an average tensile rupture strength of at least 600MPa with the nucleation phase in tension, and at least 300MPa with the growth face in tension, both such tensile rupture strengths being measured by a three point bend test on a sample 18mm long, 2mm wide and a thickness of 1,4mm or smaller. |
