Enhancement of the Refractory Matrix Diamond-Reinforced Cutting Tool Composite with Zirconia Nano-Additive
Ratov B. Mechnik V.A. Rucki M. Hevorkian E. Bondarenko N. Prikhna T. Moshchil V.E. Kolodnitskyi V. Morozow D. Gusmanova A. Jozwik J. Arshidinova M. Tofil A.
June 2024Multidisciplinary Digital Publishing Institute (MDPI)
Materials
2024#17Issue 12
This paper presents the results of the experimental research on diamond-reinforced composites with WC–Co matrices enhanced with a ZrO2 additive. The samples were prepared using a modified spark plasma sintering method with a directly applied alternating current. The structure and performance of the basic composite 94 wt.%WC–6 wt.%Co was compared with the ones with ZrO2 added in proportions up to 10 wt.%. It was demonstrated that an increase in zirconia content contributed to the intense refinement of the phase components. The composite 25 wt.%Cdiamond–70.5 wt.%WC–4.5 wt.%Co consisted of a hexagonal WC phase with lattice parameters a = 0.2906 nm and c = 0.2837 nm, a cubic phase (a = 1.1112 nm), hexagonal graphite phase (a = 0.2464 nm, c = 0.6711 nm), as well as diamond grits. After the addition of zirconia nanopowder, the sintered composite contained structural WC and Co3W3C phases, amorphous carbon, tetragonal phase t-ZrO2 (a = 0.36019 nm, c = 0.5174 nm), and diamond grits—these structural changes, after an addition of 6 wt.% ZrO2 contributed to an increase in the fracture toughness by more than 20%, up to KIc = 16.9 ± 0.76 MPa·m0.5, with a negligible decrease in the hardness. Moreover, the composite exhibited an alteration of the destruction mechanism after the addition of zirconia, as well as enhanced forces holding the diamond grits in the matrix.
composite , cutting tool , damage mechanics , microstructures , particle reinforcement , sintering
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Department of Geophysics, Institute of Geology and Oil and Gas K. Turysova, Satbayev University, Satpaev Str., 22, Almaty, 050013, Kazakhstan
V. Bakul Institute for Superhard Materials, National Academy of Science of Ukraine, Avtozavodska Str. 2, Kyiv, 04074, Ukraine
Institute of Mechanical Science, Vilnius Gediminas Technical University, Sauletekio al. 11, Vilnius, LT-10223, Lithuania
Faculty of Production Engineering, University of Life Sciences in Lublin, Gleboka 28, Lublin, 20-612, Poland
Faculty of Mechanical Engineering, Casimir Pulaski Radom University, Stasieckiego Str. 54, Radom, 26-600, Poland
Faculty of Engineering, Yessenov State University of Technology and Engineering, 32 mkr., Aktau, 130000, Kazakhstan
Department of Production Engineering, Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36, Lublin, 20-618, Poland
Institute of Oil, Mining, Geology, and IT, Caspian University, Dostyk 85A, Almaty, 050000, Kazakhstan
Institute of Technical Sciences and Aviation, The University College of Applied Sciences in Chełm, ul. Pocztowa 54, Chełm, 22-100, Poland
Department of Geophysics
V. Bakul Institute for Superhard Materials
Institute of Mechanical Science
Faculty of Production Engineering
Faculty of Mechanical Engineering
Faculty of Engineering
Department of Production Engineering
Institute of Oil
Institute of Technical Sciences and Aviation
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