| 摘要 |
abrasives. SUBSTANCE: charge containing 1-4% diamond or cubic boron nitride, graphite or hexagonal boron nitride, and catalyst is placed into high-pressure "anvil-with-socket"-type apparatus and exposed to temperature and pressure with diamond or cubic boron nitride stability range. Graininess of diamond or nitride is by 1 to 4 graininess ranks is lower than predicted graininess of final product or is equal to it. Additives of diamond or cubic boron nitride can be introduced into mixtures in the form of 1-3 graininess ranks simultaneously or successively: from lower to higher graininess ranks. If predicted graininess is coarse, amount of additive is 4 wt %, if fine - 1 wt %. EFFECT: increased yield of product with elevated content of graininesses 1-3. 5 cl, 3 tbl, 13 ex |
