Microstructure and mechanical properties of WC and Ti(C0.7N0.3) modified NbC solid solution cermets

Huang, Shuigen; Zhang, Fei; Tunca, Bensu; Huang, J.H.; Lauwers, Bert; Qian, Jun

doi:10.1016/j.jallcom.2020.156594

Cited by 16 publications

(1 citation statement)

References 32 publications

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“…The addition of both WC and Mo 2 C can enhance the wettability between the core and metallic phase and improve sintering properties of Ti(C,N)-based cermets to obtain greater performance during dry machining [ 15 , 16 , 17 ]. Furthermore, for boosting the thermal shock resistance and hot hardness, NbC plays a crucial role in this issue [ 13 , 18 ]. Moreover, Ni and Co particles are utilized as a metal binder phase, which might influence the toughness of Ti(C,N)-based cermets by compensating for the brittle nature of Ti(C,N) particles [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Si3N4 Additive on Microstructure and Mechanical Properties of Ti(C,N)-Based Cermet Cutting Tools

Elgazzar,

Zhou,

Ouyang

et al. 2024

Materials

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Development of high-performance cutting tool materials is one of the critical parameters enhancing the surface finishing of high-speed machined products. Ti(C,N)-based cermets reinforced with and without different contents of silicon nitride were designed and evaluated to satisfy the requirements. In fact, the effect of silicon nitride addition to Ti(C,N)-based cermet remains unclear. The purpose of this study is to investigate the influence of Si3N4 additive on microstructure, mechanical properties, and thermal stability of Ti(C,N)-based cermet cutting tools. In the present work, α-Si3N4 “grade SN-E10” was utilized with various fractions up to 6 wt.% in the designed cermets. A two-step reactive sintering process under vacuum was carried out for the green compact of Ti(C,N)-based cermet samples. The samples with 4 wt.% Si3N4 have an apparent solid density of about 6.75 g/cm3 (relative density of about 98 %); however, the cermet samples with 2 wt.% Si3N4 exhibit a superior fracture toughness of 10.82 MPa.m1/2 and a traverse rupture strength of 1425.8 MPa. With an increase in the contents of Si3N4, the Vickers hardness and fracture toughness of Ti(C,N)-based cermets have an inverse behavior trend. The influence of Si3N4 addition on thermal stability is clarified to better understand the relationship between thermal stability and mechanical properties of Ti(C,N)-based cermets.

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Section: Introductionmentioning

confidence: 99%

Effect of Si3N4 Additive on Microstructure and Mechanical Properties of Ti(C,N)-Based Cermet Cutting Tools

Elgazzar,

Zhou,

Ouyang

et al. 2024

Materials

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Effect of different binders and secondary carbides on NbC cermets

Hübler

Gradt

2022

Forsch Ingenieurwes

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Due to the rapidly increasing price of tungsten carbide and the significant health risks associated with the wear products of WC-Co (Co3O4 and Wo3), an alternative is required. Niobium carbide (NbC) is well suited as a cutting tool due to its high melting point and low solubility in iron. Compared to pure NbC, a complete substitution of WC to NbC-Co resulted in an increased toughness and strength. As alternative binders, nickel and iron-based binders were subsequently investigated. Although iron-based cermets would be an economical, low-cost alternative to NbC-Ni cermets, they showed a higher coefficient of friction and wear rate. So far, NbC-Ni cermets best met the requirements of high hardness and toughness. Various secondary carbides such as VC, Mo2C, TiC, but also WC were added to further improve the hardness. Elemental analyses of NbC-Ni-MeC cermets (Me = metal) showed that the binder is a face-centered cubic solid solution, while the NbC phase is a solid solution of the type (Nb, Me)C.

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Diffusion Behavior of Secondary Carbides and Subsequent Influence on Microstructure of NbC-Ni-Based Cermets

Liu

Peng

Zhou

et al. 2023

J. Phase Equilib. Diffus.

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Microstructure and mechanical properties of WC and Ti(C0.7N0.3) modified NbC solid solution cermets

Cited by 16 publications

References 32 publications

Effect of Si3N4 Additive on Microstructure and Mechanical Properties of Ti(C,N)-Based Cermet Cutting Tools

Effect of Si3N4 Additive on Microstructure and Mechanical Properties of Ti(C,N)-Based Cermet Cutting Tools

Effect of different binders and secondary carbides on NbC cermets

Diffusion Behavior of Secondary Carbides and Subsequent Influence on Microstructure of NbC-Ni-Based Cermets

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