Influence of CrB2 additive on the morphology, structure, microhardness and fracture resistance of diamond composites based on WC‒Co matrix

Ratov, Boranbay; Мечник, В. А.; Gevorkyan, É. S.; Matijosius, J.; Kolodnitskyi, V. M.; Chishkala, V. A.; Kuzin, Nykolai O.; Siemiątkowski, Zbigniew; Rucki, Mirosław

doi:10.1016/j.mtla.2022.101546

Cited by 10 publications

(6 citation statements)

References 60 publications

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“…In Figure 5b), we see that there is also a gap in the cross-section of the fractured side of the shaft between the shaft and the coupling joint. This confirms the assumption that the gap is not a consequence of a fracture [34].…”

Section: Axle Construction Analysissupporting

confidence: 86%

Material’s Strength Analysis of the Coupling Node of Axle of the Truck Trailer

et al. 2023

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Road transport plays an important role in the transport of goods and people and is important for the national economy. Damage usually excludes the means of transport from operation, which causes disruption of supply chains. One such damage is the failure of the suspension system of the vehicle or trailer, which usually occurs when the vehicle is heavily loaded. Such a defective system has been analyzed in this publication. Mathematical apparatus and finite element method (FEM) numerical simulations were used. A dangerous axle cross-section in terms of load was indicated and the maximum stresses in this area were calculated for two types of roads. On highways, the stress at the critical point was 199 MPa, and on uneven roads it increased to 304 MPa, which is comparable to the yield point. It was found that the second form of vibration may cause stresses in the damage area, but the excitation frequency would have to be quite high. The probability of such a load and failure event occurring is low under operating conditions.

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Section: Axle Construction Analysissupporting

confidence: 86%

Material’s Strength Analysis of the Coupling Node of Axle of the Truck Trailer

et al. 2023

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“…It was demonstrated previously that decrease of both modulus E and nanohardness H not necessarily resulted with worsened performance, if the respective indexes Н/Е, Н 3 /Е 2 , and 1/(Е 2 /Н) increased, accordingly [32]. Table 3 presents the values of nanohardness H, modulus E, elastic strain to failure ratio H/E, resistance to plastic deformation index H 3 /E 2 , and index of tolerance to abrasion damage 1/(E 2 H) for the matrices 51 wt.% Fe -32 wt.% Cu -9 wt.% Ni -8 wt.% Sn with different percentages of the micropowder CrB 2 and nanopowder VN added.…”

Section: Mechanical Propertiesmentioning

confidence: 82%

“…Among others, CrB 2 additive was found useful as a strengthening component of the diamondreinforced metal matrix composites [31,32]. It was demonstrated that addition of 2 wt.% of CrB 2 to the Fe-Cu-Ni-Sn matrix, together with relevant optimization of the sintering conditions, enhanced retention of the diamond grits in the matrix and provided decarburization bonding the non-diamond carbon to the compounds like Cr 3 C 2 , Cr 7 C 3 , Cr 1.65 Fe 0.35 B 0.96 [33].…”

Section: Introductionmentioning

confidence: 99%

Combined Effect of CrB<sub>2</sub> Micropowder and VN Nanopowder on the Strength and Wear Re-sistance of Fe‒Cu–Ni–Sn Matrix Diamond Composites

Ratov¹,

Мечник²,

Rucki³

et al. 2023

Adv. Sci. Technol. Res. J.

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The paper presents research results on the enhancement of diamond composites designed for tools application for mining industry, hard rocks cutting, able to withstand harsh conditions under heavy dynamical loads. In the present study, both CrB 2 micropowder and VN nanopowder additives were used in proportions up to 5 wt.% and 6 wt.%, respectively, together with the basic matrix composition of 51 wt.% Fe, 32 wt.% Cu, 9 wt.% Ni, and 8 wt.% Sn. Addition of both components, CrB 2 and VN, appeared to be advantageous in proportion of 2 wt.% and 4 wt.%, respectively. This composition exhibited the highest relative density of 0.9968, better than that without additives. Similarly, the highest values of compressive strength R cm and flexural strength R bm were reached for the composite with the same percentage of CrB 2 and VN. Compared to the composite with no addition of CrB 2 and VN, R cm improved by almost 70%, while R bm by 81%. Additionally, the abovementioned additives enhanced the ability of the matrix to prevent the diamond reinforcement from being torn out of the composite, which is very important under harsh working conditions of the cutting tools. The presence of CrB 2 micropowder and VN nanopowder promoted densification of the matrix and adhesion between the diamond grits and the Fe-Cu-Ni-Sn matrix.

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“…[15][16][17][18][19][20] CrB 2 additive of 4 wt% improves fracture toughness (9-14.5 MPa m 1/2 ), flexural strength (1680-2360 MPa), and compressive strength (4304-4624 MPa) of WC-Co composites. 21 SiAlON additive improves the hardness and fracture toughness of WC to 22 GPa and 10.94 MPa m 1/2 for the WC-SiAlON composites. 22 Compared to other materials, diamond has the highest hardness (5700-10400 kg/mm 2 ) and Young's modulus (910-1250 GPa).…”

Section: Introductionmentioning

confidence: 94%

“…In general, all carbides, such as TaC, TiC, Mo 2 C, Cr 3 C 2 , VC, and NbC, prevent the grain growth of WC–Co and improve its mechanical properties 15–20 . CrB 2 additive of 4 wt% improves fracture toughness (9–14.5 MPa m 1/2 ), flexural strength (1680–2360 MPa), and compressive strength (4304–4624 MPa) of WC–Co composites 21 . SiAlON additive improves the hardness and fracture toughness of WC to 22 GPa and 10.94 MPa m 1/2 for the WC–SiAlON composites 22 …”

Section: Introductionmentioning

confidence: 99%

Effect of diamond volume fraction on the microstructure and mechanical properties of SPS WC–Co/diamond composites

Pirmohammadi,

Zakeri,

Razavi

et al. 2023

Int J Applied Ceramic Tech

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In this research, the effect of the volume percentage of diamond additive on the sintering behavior, microstructure, and mechanical properties of WC–Co was investigated. WC–Co/diamond composites with different percentages of 0%, 2.5%, 5%, 7.5%, and 10% by volume of diamond were made by spark plasma sintering at 1300°C and 40 MPa for 5 min. A small amount of phase transformation from the diamond phase to the graphite phase was observed. The amount of graphitization was low due to low temperature and short sintering time. The addition of diamond leads to a significant enhancement in both the hardness and fracture toughness of the composites, overcoming the trade‐off between hardness and toughness typically observed in WC‐based materials. The sample reinforced with 5% by volume of diamond showed simultaneously the highest hardness (22.9 GPa), the highest fracture toughness (22.7 MPa m1/2), and the highest flexural strength (1896 MPa). The uniform dispersion, good bonding of the superhard diamond phase with the matrix, and the fine microstructure caused the high hardness and toughness of composite. The main effective mechanisms in increasing the fracture toughness of the composite were crack deflection, bridging, and blocking of crack propagation by diamond particles.

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Influence of CrB2 additive on the morphology, structure, microhardness and fracture resistance of diamond composites based on WC‒Co matrix

Cited by 10 publications

References 60 publications

Material’s Strength Analysis of the Coupling Node of Axle of the Truck Trailer

Material’s Strength Analysis of the Coupling Node of Axle of the Truck Trailer

Combined Effect of CrB<sub>2</sub> Micropowder and VN Nanopowder on the Strength and Wear Re-sistance of Fe‒Cu–Ni–Sn Matrix Diamond Composites

Effect of diamond volume fraction on the microstructure and mechanical properties of SPS WC–Co/diamond composites

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