Tungsten Carbide Polycrystalline Composite Material for Working Elements of Drilling Tools

Contact informationV. Bakul Institute for Superhard Materials, Department N 14, Department head Oleksandr Bochechka, tel. (044) 379-14-47)

Problem Description

The optimal sintering parameters and formulation of a diamond composite from diamond and tungsten powders of submicron and nanosizes at high pressure and temperature have been defined. It has been shown that as a result of the diamond and tungsten interaction tungsten carbide particles, which are chemically bonded to diamond particles, form in spaces between them. Over the whole volume of the composite the structure has been observed, where tungsten carbide and diamond grains are regularly placed and are uniform in size. An addition of a coarse diamond component to the composite has been found to contribute to an increase of the composite wear resistance. We propose to use this material as a work item for the various types of rock cutting tools.

The way of problem solving

The composite has a high hardness (HV5 = 25 GPa), fracture toughness (KIc = 6,6 MPa·m1/2) and thermal stability (at 1100 °C TS = 0,86). We conducted laboratory tests of cutters for rotary drilling holes with a diameter of 33 mm for anchoring mines equipped with working elements of this composite. On the road cutting 182 m average width of wear and tear of the unit area of the plate was 1.6 mm, which corresponds to the deterioration of the standard ATP under the same conditions. Increased wear resistance of the plates will be achieved by increasing the hardness of a coarse diamond component.

Cutters for rotary drilling holes equipped with working elements of diamond–tungsten carbide polycrystalline composite

 Basic publications


  1. S. N. Nazarchuk, A. A. Bochechka, V. S. Gavrilova, L. A. Romanko, N. N. Belyavina, L. I. Aleksandrova, V. N. Tkach, E. F. Kuz’menko, and S. D. Zabolotnyi Diamond–Tungsten Carbide Polycrystalline Composite Material // Journal of Superhard Materials. ‑ 2011. - N 1. - P.3-17.
  2. 93803, . .6 , >24D 3/02, B22F 3/14. / . . , . . , . . , .. , . . , . . , . . , . . . – . 10.03.11. . 5.
  3. . ., . .,. . , . ., . ., . .., . ., . ., . ., . . – // . – . : , 2011. 1–2 (49–50). – .50–52.


Innovative Aspects of the solution / development/methodology, tool, prototype

Thermal stability of the material exceeds the thermal stability of the standard diamond-carbide plates at 400 degrees.

Main advantages of the solution / development/methodology, tool, prototype

The economic benefits include increased rates of penetration due to the increased thermal stability of the working elements of the instrument..

Current stage of development of the offered solution / development/ methodology, tool, prototype

Development phase – laboratory tested

Intellectual Property Rights

patents granted Ukraine (enter the countries that have granted the patents; where the initial patent was granted and say a few words about the company)

Collaboration Details

Commercial agreement with technical assistance

Technology Keywords

Diamond composite, sintering, high pressure, diamond nanopowder, tungsten carbide, drilling tools.