FORMATION OF GROWTH CONDITIONS FOR THE RECEIPT OF STRUCTURALLY PERFECT DIAMONDS UNDER HIGH PRESSURE WITH TEMPERATURE GRADIENT METHOD USING

  • A. V. Burchenia V. N. Bakul Institute for superhard materials of NAS of Ukraine
  • V. V. Lysakovskyi V. N. Bakul Institute for superhard materials of NAS of Ukraine
  • S. O. Gordeev V. N. Bakul Institute for superhard materials of NAS of Ukraine
  • V. A. Kalenchuk V. N. Bakul Institute for superhard materials of NAS of Ukraine
Keywords: temperature gradient, diamond, high pressure apparatus, temperature distribution, growth system

Abstract

In depending on the composition of the growth system, structurally perfect diamonds obtaining in pressure and temperature region 5 to 8 GPa and 1200 to 1700 ℃, respectively. Single crystals growth rates reach up to 8–10 mg/h (type Ib), 1–2,5 mg/h (type IIa), 2–4 mg/h (type IIb). The maximum permissible values of temperatures at which persist stable conditions of cultivation in design depending of the apparatus of high pressure and container materials properties is determined

Published
2018-07-26
Issue
Vol 21 (2018): Rock Destruction and Metal-Working Tools – Techniques and Technology of the Tool Production and Applications
Section
Instrumental, structural and functional materials based on diamond and cubic bor