Novel WC-Co-Ti3SiC2 cemented carbide with ultrafine WC grains and improved mechanical properties

Li, Meng; Gong, Min; Cheng, Zanlin; Mo, Deyun; Wang, Lei; Dusza, Ján; Zhang, Chengyu

doi:10.1016/j.ceramint.2022.04.239

Cited by 11 publications

(7 citation statements)

References 40 publications

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“…Existing research suggests that in composite materials, finer WC grain size leads to a notable enhancement in alloy hardness. However, as hardness increases, fracture toughness typically decreases simultaneously 31,32. In our experiment, the addition of Mo played a crucial role in refining the grain size, thereby enhancing hardness.…”

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confidence: 63%

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In-situ-growth of hard-coating, its impact on mechanical performances in cemented-carbides

Wu,

Gong,

et al. 2024

Surface Engineering

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This study focuses on preparing two types of cemented carbides: one with Ti elements and the other without, using a stepwise sintering process, primarily evaluating their mechanical properties. The research includes a thorough analysis of microstructure changes and post-wear surface alterations, coupled with assessments of phase composition, element content, relative density, surface hardness, fracture toughness, and wear properties. Results reveal that cemented carbides treated with in-situ surface modification under high-temperature nitrogen atmospheres exhibit exceptional densification. An in-situ hard-phases layer, predominantly TiN or Ti(C, N), is gradually grown on the surface of the WC-Co-Mo-TiNC cemented carbides, enhancing surface hardness and fracture toughness. This technology fortifies the material against indentation, crack expansion, and fracture, significantly improving wear resistance and extending service life. In essence, the in-situ surface modification technology, especially under high-temperature nitrogen atmospheres, emerges as a transformative approach, enhancing mechanical properties and substantially improving wear resistance for prolonged practical applications.

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confidence: 63%

“…However, as hardness increases, fracture toughness typically decreases simultaneously. 31,32 In our experiment, the addition of Mo played a crucial role in refining the grain size, thereby enhancing hardness. Crucially, after nitriding treatment, the fracture toughness of the WC-Co-Mo-TiNC cemented carbides' surface did not decrease.…”

Section: Densificationmentioning

confidence: 76%

In-situ-growth of hard-coating, its impact on mechanical performances in cemented-carbides

Wu,

Gong,

et al. 2024

Surface Engineering

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“…Currently, the main investigations concerning WC-based cemented carbides are focused on mechanical properties [ 12 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Study concerning their thermal properties still needs to be advanced.…”

Section: Introductionmentioning

confidence: 99%

Investigations on Thermal Conductivity of Two-Phase WC-Co-Ni Cemented Carbides through a Novel Model and Key Experiments

Wen

Jing

Long³

et al. 2023

Materials

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Excellent thermal conductivity is beneficial for the fast heat release during service of cemented carbides. Thus, thermal conductivity is a significant property of cemented carbides, considerably affecting their service life. Still, there is a lack of systematic investigation into the thermal conductivity of two-phase WC-Co-Ni cemented carbides. To remedy this situation, we integrated experiments and models to study its thermal conductivity varying the phase composition, temperature and WC grain size. To conduct the experiments, WC-Co-Ni samples with two-phase structure were designed via the CALPHAD (Calculation of Phase Diagrams) approach and then prepared via the liquid-phase sintering process. Key thermal conductivity measurements of these prepared samples were then taken via LFA (Laser Flash Analysis). As for modeling, the thermal conductivities of (Co, Ni) binder phase and WC hard phase were firstly evaluated through our previously developed models for single-phase solid solutions. Integrating the present key measurements and models, the values of ITR (Interface Thermal Resistance) between WC hard phase and (Co, Ni) binder phase were evaluated and thus the model to calculate thermal conductivity of two-phase WC-Co-Ni was established. Meanwhile, this model was verified to be reliable through comparing the model-evaluated thermal conductivities with the experimental data. Furthermore, using this developed model, the thermal conductivity of two-phase WC-Co-Ni varying with phase-fraction, temperature and grain size of WC was predicted, which can contribute to its design for obtaining desired thermal conductivities.

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“…To overcome the trade‐off between hardness and toughness, the development of cemented carbides with low Co content and Co‐free materials has gradually attracted the attention of researchers 7–10 . Some carbides, nitrides, or oxides with high hardness and chemical stability have been added to WC‐based cemented carbides to improve the high‐temperature hardness, oxidation resistance, and corrosion resistance 11–13 . Transition metal carbides, such as VC, Mo 2 C, NbC, TiC, and TaC, can enhance their toughness through the second‐phase toughening mechanism while maintaining their high hardness 1,3,14,15 .…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10] Some carbides, nitrides, or oxides with high hardness and chemical stability have been added to WC-based cemented carbides to improve the high-temperature hardness, oxidation resistance, and corrosion resistance. [11][12][13] Transition metal carbides, such as VC, Mo 2 C, NbC, TiC, and TaC, can enhance their toughness through the second-phase toughening mechanism while maintaining their high hardness. 1,3,14,15 When 20 at.% TiC was added to WC, the cemented carbide exhibited a toughness of 7.5 MPa⋅m 1/2 and a hardness of 22.40 GPa.…”

Section: Introductionmentioning

confidence: 99%

Effects of Nb/TiC/TaC/VC and Co addition on the microstructure and properties of WC‐based cemented carbides

Zhai

Peng

et al. 2023

Int J Applied Ceramic Tech

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A series of WC‐based cemented carbides with Nb/TiC/TaC/VC and Co was prepared through spark plasma sintering (SPS) at a low sintering temperature of 1300°C, and their microstructures and mechanical properties were investigated. The nonstoichiometric multicomponent carbide Nb/TiC/TaC/VC with a rock‐salt structure (Fmtrue3¯m$Fm\bar{3}m$) has a high atomic solution capacity. In the sintering process, partial WC and Co may dissolve in Nb/TiC/TaC/VC. With a high concentration of carbon vacancies, Nb/TiC/TaC/VC plays a beneficial role as a mass transfer intermediary. Good mass transfer facilitates the formation of a more accommodating and stable bonding between WC, Nb/TiC/TaC/VC, and Co, thereby preserving the hardness of the sintered bulks and preventing the initiation and propagation of cracks. When 6 wt.% Nb/TiC/TaC/VC and 4 wt.% Co are added to WC, the sintered bulk with fine grains exhibits superior hardness (23.27 ± .63 GPa) and toughness (10.45 ± .56 MPa·m1/2).

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Novel WC-Co-Ti3SiC2 cemented carbide with ultrafine WC grains and improved mechanical properties

Cited by 11 publications

References 40 publications

In-situ-growth of hard-coating, its impact on mechanical performances in cemented-carbides

In-situ-growth of hard-coating, its impact on mechanical performances in cemented-carbides

Investigations on Thermal Conductivity of Two-Phase WC-Co-Ni Cemented Carbides through a Novel Model and Key Experiments

Effects of Nb/TiC/TaC/VC and Co addition on the microstructure and properties of WC‐based cemented carbides

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