Investigating the Wear Resistance of Cdiamond–(WC–Co)–ZrO2 Composite Impregnated Crowns in Granite Drilling


Ratov B.T. Mechnik V.A. Gevorkyan E.S. Bondarenko N.A. Kolodnitskyi V.M. Akhmetova N.S. Korostyshevskyi D.L. Bayamirova R.U.
August 2024Pleiades Publishing

Journal of Superhard Materials
2024#46Issue 4314 - 321 pp.

Abstract: The study investigated the wear rate dependences of diamond-impregnated drill bits consisting of composite diamond-containing materials (CDMs): specifically, 25Cdiamond–70.5WC–4.5Co and 25Cdiamond–68.62WC–4.38Co‒2ZrO2. These materials were fabricated via spark plasma sintering at temperatures ranging from 20 to 1350°C under a pressure of 30 MPa for 3 min. Testing was conducted under rotational speeds and axial load conditions typical for granite drilling. It was demonstrated that incorporating 2 wt % of ZrO2 nanopowder into the composition of 25Cdiamond–70.5WC–4.5Co resulted in a threefold reduction in wear rate. The highest wear resistance of these diamond-impregnated drill bits was observed at rotational speeds of 250 rpm and axial loads of 900 kg, as well as at 750 rpm and 1250 kg axial load. Comparatively, the enhanced wear resistance of diamond-impregnated drill bits made from 25Cdiamond–68.62WC–4.38Co‒2ZrO2, in contrast to those made from 25Cdiamond–70.5WC–4.5Co, can be attributed to factors such as finer grain size, higher relative density, improved strength under compression and bending, increased fracture toughness, and the formation of strong bonding between diamond grains and the hard-alloy matrix. These findings, combined with the fine-grained structure of the hard-alloy matrix and high diamond retention, indicate that these diamond-impregnated drill bits have potential for application in developing new tools with superior operational properties for drilling hard rock formations.

cobalt , composite , diamond-impregnated drill bit , spark plasma sintering , tungsten carbide , wear resistance , zirconium dioxide

Text of the article Перейти на текст статьи

Satpayev University, Almaty, 050000, Kazakhstan
Bakul Institute for Superhard Materials, National Academy of Sciences of Ukraine, Kyiv, 04074, Ukraine
Kazimierz Pułaski University of Technology and Humanities in Radom, Radom, 26600, Poland
Caspian University of Technology and Engineering named after Sh.Yesenova, Aktau, 130000, Kazakhstan

Satpayev University
Bakul Institute for Superhard Materials
Kazimierz Pułaski University of Technology and Humanities in Radom
Caspian University of Technology and Engineering named after Sh.Yesenova

10 лет помогаем публиковать статьи Международный издатель

Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026