| abstract |
A polycrystalline cubic boron nitride, PCBN material is provided. This material comprises 30-90 weight percent cubic boron nitride (cBN), and a matrix material in which cBN particles are dispersed. The matrix material comprises particles of an aluminum compound and the matrix material particles have a d50 of 100 nm or less when measured using the section length method. [Selection diagram] Fig. 3 |