Materials, Vol. 18, Pages 1965: Wear Resistance of the Refractory WC–Co Diamond-Reinforced Composite with Zirconia Additive

Materials doi: 10.3390/ma18091965

Authors:
Boranbay Ratov
Volodymyr Mechnik
Edvin Hevorkian
Miroslaw Rucki
Daniel Pieniak
Nikolai Bondarenko
Vasyl Kolodnitskyi
Sergii Starik
Viktor Bilorusets
Volodymyr Chishkala
Perizat Sundetova
Aldabergen Bektilevov
Anar Shukmanova
Askar Seidaliyev

This paper provides deeper insights into the performance of diamond particulate reinforced refractory composites used for cutting tools in the oil and gas industries. In particular, 25Cdiamond–70.5WC–4.5Co composites were enhanced with zirconia additives in proportions of 4 wt.% and 10 wt.% via the spark plasma sintering method. Wear tests were performed, and the analyses of elemental composition, morphology, and microstructure were completed. It was found that the addition of yttria-stabilized zirconia increased the plasticity of the matrix and thus introduced the ductile fracture mechanism, reducing the role of abrasive wear. As a result, the specific wear rate was reduced by 44% after the addition of 4 wt.% of zirconia and by 80% with 10 wt.% of ZrO2. The presence of zirconia contributed to the increase in the retention force between the matrix and diamond grits, which further reduced the intensity of the abrasive mechanism.

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