Enhancement of the Refractory Matrix Diamond-Reinforced Cutting Tool Composite with Zirconia Nano-Additive

Enhancement of the Refractory Matrix Diamond-Reinforced Cutting Tool Composite with Zirconia Nano-Additive

This paper presents the results of the experimental research on diamond-reinforced composites with WC-Co matrices enhanced with a ZrO additive. The samples were prepared using a modified spark plasma sintering method with a directly applied alternating current. The structure and performance of the b...

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Bibliographic Details
Published in:Materials Vol. 17; no. 12; p. 2852
Main Authors: Ratov, Boranbay, Mechnik, Volodymyr A, Rucki, Miroslaw, Hevorkian, Edvin, Bondarenko, Nikolai, Prikhna, Tetiana, Moshchil, Viktor E, Kolodnitskyi, Vasyl, Morozow, Dmitrij, Gusmanova, Aigul, Jozwik, Jerzy, Arshidinova, Makhiram, Tofil, Arkadiusz
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 11-06-2024
MDPI
Subjects:
Alcohol
Cobalt
Cutting tools
Diamond machining
Diamond tools
Diamonds
Drilling
Fracture toughness
Grain size
Hardness
Lattice parameters
Mechanical properties
Microstructure
Particle size
Plasma sintering
Spark plasma sintering
Tungsten carbide
Zirconium dioxide
Zirconium oxide
Poland
United Kingdom
microstructures
sintering
composite
particle reinforcement
damage mechanics
cutting tool
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Summary:This paper presents the results of the experimental research on diamond-reinforced composites with WC-Co matrices enhanced with a ZrO 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 ZrO 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.%C -70.5 wt.%WC-4.5 wt.%Co consisted of a hexagonal WC phase with lattice parameters = 0.2906 nm and = 0.2837 nm, a cubic phase ( = 1.1112 nm), hexagonal graphite phase ( = 0.2464 nm, = 0.6711 nm), as well as diamond grits. After the addition of zirconia nanopowder, the sintered composite contained structural WC and Co W C phases, amorphous carbon, tetragonal phase ZrO ( = 0.36019 nm, = 0.5174 nm), and diamond grits-these structural changes, after an addition of 6 wt.% ZrO contributed to an increase in the fracture toughness by more than 20%, up to = 16.9 ± 0.76 MPa·m , 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.
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content type line 23
ISSN:1996-1944
1996-1944
DOI:10.3390/ma17122852