MODIFICATION OF NANOSIZED DIAMOND POWDERS BY INTERACTION WITH TUNGSTEN TRIOXIDE IN THE GAS PHASE

  • Oleksandr Chernienko V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • Olha Kushch V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • Viktor Garashchenko V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • Tetiana Kuryliak V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • Serhii Lysovenko V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • Oleksandr Bochechka V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • Eduard Lutsak V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
Keywords: nanosized diamond powder, IR-spectroscopy, functional groups, tungsten trioxide

Abstract

In this work, the functional state of the surface of nanosized diamond powders (NDP) was changed by annealing in an atmosphere containing tungsten trioxide. It has been established that tungsten trioxide allows modification of the surface of diamond powders, and also prevents undesirable processes on the diamond surface that occur at temperatures up to 900°C. If the atmosphere of the furnace volume contains air and WO3 vapors, the surface modification nanosized diamond powders does not occur, but its oxidation rate slows down at a temperature of 900°C compared to oxidation in an atmosphere of air without WO3 vapors.

Published
2020-09-25
Issue
Vol 23 No 1 (2020): Tooling materials science
Section
Instrumental, structural and functional materials based on diamond and cubic bor