Preparation and properties of the VC/Cr3C2/TaC doped ultrafine WC-Co tool material by spark plasma sintering

Wang, Boxiang; Wang, Zhenhua; Yin, Zengbin; Yuan, Jun; Jia, Jiheng

doi:10.1016/j.jallcom.2019.152598

Cited by 43 publications

(21 citation statements)

References 36 publications

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“…In the case where the preparation method and the original particle size of WC are the same, the average grain size of WC-8Co at a sintering temperature of 1350°C is about 400 nm. 27 The grain size of the three composite binder phases prepared in this paper has decreased by 15%-28% compared with that. This is because partial or complete replacement of Co with Cr, Nb, and AlCoCrNiNb 0.5 can suppress grain growth.…”

Section: Resultsmentioning

confidence: 74%

“…As shown in Figure 5B,C, with the sintering temperature increases, the proportion of coarse grains in the sample increases, and the average grain size increases. In the case where the preparation method and the original particle size of WC are the same, the average grain size of WC‐8Co at a sintering temperature of 1350°C is about 400 nm 27 . The grain size of the three composite binder phases prepared in this paper has decreased by 15%–28% compared with that.…”

Section: Resultsmentioning

confidence: 83%

“…The Sample A0 is WC-8Co prepared by the same preparation process in our previous work. 27 It can be observed from Figure 6A that the sample A1 has a density of 99.9% at 1250°C. The density of A0 reaches 99.5%, while the sample A2, A3, and A4 are only about 97% at the same temperature.…”

Section: Resultsmentioning

confidence: 91%

“…Figure 6 shows relative density and mechanical properties of WC‐8Co, WC‐8(Co‐Ni‐Fe/Cr/Nb), and WC‐8HEA at different sintering temperatures. The Sample A0 is WC‐8Co prepared by the same preparation process in our previous work 27 . It can be observed from Figure 6A that the sample A1 has a density of 99.9% at 1250°C.…”

Section: Resultsmentioning

confidence: 95%

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Effects of composite binder phase on microstructure and mechanical properties of ultrafine‐grained cemented carbides

Wang

Sun

et al. 2020

Int J Applied Ceramic Tech

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In order to develop a new high-performance binder phase, four different alloys Co-Ni-Fe, Co-Ni-Cr, Co-Ni-Nb, and AlCoCrNiNb 0.5 were used as a binder in cemented carbides. The room-temperature mechanical properties and high-temperature flexural strength of cemented carbides were studied. The results show that the optimal mechanical properties for the WC-8(Co-Ni-Fe, Co-Ni-Cr, Co-Ni-Nb, and AlCoCrNiNb 0.5) can be obtained at the sintering temperatures of 1200°C, 1350°C, 1350°C, and 1300°C, respectively. Compared with cemented carbides with Co as binder phase, the hardness of the four kinds of alloys is increased, the WC grain size becomes finer, but the fracture toughness is slightly decreased. When the temperature is under 600°C, there is no visible oxidation of the four kinds of cemented carbides, and their bending strengths are basically not reduced. When the temperature increased from 600°C to 900°C, the WC-8(Co-Ni-Nb) and WC-8(Co-Ni-Fe) samples present the better high-temperature bending resistance compared with the WC-8(Co-Ni-Cr) and WC-8AlCoCrNiNb 0.5 samples, with respective decrease in bending strength of 11.7% and 7.3%. K E Y W O R D S carbides, composite binder phase, mechanical properties, spark plasma sintering How to cite this article: Yu B, Wang Z, Sun N, et al. Effects of composite binder phase on microstructure and mechanical properties of ultrafine-grained cemented carbides.

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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 95%

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Effects of composite binder phase on microstructure and mechanical properties of ultrafine‐grained cemented carbides

Wang

Sun

et al. 2020

Int J Applied Ceramic Tech

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“…The WC-8 wt. % Co cemented carbides with Cr 3 C 2 addition have higher TRS and fracture toughness as compared to those with VC and TaC additions [10]. Adding TaC can improve the resistance to plastic deformation and high-temperature properties of WC-Co alloys [11][12][13].…”

Section: Introductionmentioning

confidence: 97%

Effects of Cr3C2, VC, and TaC on Microstructure, WC Morphology and Mechanical Properties of Ultrafine WC–10 wt. % Co Cemented Carbides

Yin

Ruan

et al. 2020

Metals

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In this study, the effects of Cr3C2, VC, and TaC on microstructure, WC grain morphology and mechanical properties of WC–10 wt. % Co ultrafine cemented carbides were investigated. The experimental results showed that WC grains size decreased and size distribution became narrow by adding Cr3C2, VC, and TaC. The inhibition efficiency was in the order of VC > Cr3C2 > TaC. Cr3C2 addition would induce triangular prism grains and Co phase was strengthened by Cr3C2, resulting in the enhancement of transverse rupture strength (TRS) and impact toughness. WC morphologies in cemented carbides with VC addition were triangular prisms with multi-steps in basal and prismatic planes due to anisotropic growth. The multi-steps in basal and prismatic planes led to low TRS and fracture toughness. The inhibition mechanism of TaC is to reduce the surface energy of WC and slow down the solution/re-precipitation rate at the WC/Co interfaces by adsorbing on the surface of WC grains. The sample with 0.8 wt. % Cr3C2 had excellent comprehensive mechanical properties. Its Vickers hardness, fracture toughness, TRS and impact toughness were 1620 kg/mm2, 9.94 MPa·m1/2, 3960 MPa and 50.4 J/m2, respectively. In summary, Cr3C2 is the first choice as the grain growth inhibitors (GGI) for the preparation of ultrafine cemented carbides.

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Ultrasonic-assisted preparation of complex-shaped ceramic cutting tools by microwave sintering

Hong

Yuan

Yin

et al. 2020

Ceramics International

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Preparation and properties of the VC/Cr3C2/TaC doped ultrafine WC-Co tool material by spark plasma sintering

Cited by 43 publications

References 36 publications

Effects of composite binder phase on microstructure and mechanical properties of ultrafine‐grained cemented carbides

Effects of composite binder phase on microstructure and mechanical properties of ultrafine‐grained cemented carbides

Effects of Cr3C2, VC, and TaC on Microstructure, WC Morphology and Mechanical Properties of Ultrafine WC–10 wt. % Co Cemented Carbides

Ultrasonic-assisted preparation of complex-shaped ceramic cutting tools by microwave sintering

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