WEAR RESISTANCE OF POLYCRYSTALS AND "DIAMOND - TUNGSTEN CARBIDE" COMPOSITE SINTERED FROM DIAMOND POWDERS SYNTHESIZED IN THE Mg-Zn-C SYSTEM DURING GRANITE CORE TURNING

  • O. O. Bochechka V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • O. M. Isonkin V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
  • O. I. Chernienko V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine
  • O. V. Kushch V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine
  • D. V. Sokoliuk V. N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
Keywords: granite core turning, wear resistance, hardness, diamond powders, high pressure, sintering, diamond polycrystal, diamond - tungsten carbide composite.

Abstract

Samples of polycrystals and the "diamond - tungsten carbide" composite were obtained by high pressure sintering of diamond powders synthesized in the Mg-Zn-C system. A study of the wear resistance of the obtained samples was carried out by turning a cylindrical core of granite from the Korostyshev field of the X category of drillability. It is shown that an increase to 40% of the content of diamond particles with a size of more than 80 μm in the initial mixture for sintering polycrystals at the same density and close values ​​of hardness of the obtained samples increases their wear resistance by 5.8 times. The wear resistance of the samples of the "diamond - tungsten carbide" composite obtained from the specified mixture of diamond powders has the level of wear resistance of polycrystals sintered from finely dispersed diamond powder.

Published
2022-02-11
Issue
Vol 24 No 1 (2021): Instrumental Materials Science
Section
Instrumental, structural and functional materials based on diamond and cubic bor