Preparation of a highly toughened (Ti,W)C-20Ni cermet through in situ formation of solid solution and WC whiskers

Kwon, Hanjung; Suh, Chang–Yul; Kim, Wonbaek

doi:10.1016/j.ceramint.2014.11.031

Cited by 26 publications

(7 citation statements)

References 18 publications

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“…Platelets can strengthen the composites via crack deflection and bridging mechanisms, whereas fine‐grained matrices ensure good hardness. (Ti, W)C–20Ni reinforced with WC platelets has been reported by Kwon; it exhibited a very high toughness of 16.6 MPa·m 1/2 . Thus, dual‐grained CSCs with (Ti, M)C/(Ti, M)(C, N) platelets and grains, should also be promising cermets.…”

Section: Introductionmentioning

confidence: 64%

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Dual‐grained (Ti, W)C–Ni cermets by two‐step carbonization: Hot isotropic press sintering of NiTiW alloys and colloidal graphite

Xiong

Yue

et al. 2018

J Am Ceram Soc

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Reactive sintering of crushed metals and carbon is advantageous for preparing toughened complete solid-solution cermets (CSCs). Here, dual-grained (Ti 0.6 , W 0.4 )C-18Ni cermets were prepared using a two-step carbonization method. High-energy milling of Ni-Ti-W-C (Ni(Ti 0.6 , W 0.4 ) 4 C) mixture afforded NiTiW solid solution, which was then transformed into Ni 6 W 6 C by heating at 1250°C.Twinned (Ti, W)C platelets were formed by the carbonization of Ni 2 W 4 C during liquid sintering. W atoms that accumulated in the (111) planes of TiC promoted the {111} twin formation, leading to sandwich-type (Ti, W)C platelets. Dense (Ti 0.6 , W 0.4 )C-18Ni cermets were obtained by hot isostatic press sintering in Ar with satisfactory Hv of 12.8 ± 0.2 GPa, high strength of 1960 ± 84 MPa and toughness of 15.80 ± 0.6 MPa·m 1/2 . A higher sintering temperature or graphite content accelerated the carbonization, resulting in coarser platelets with decreased aspect ratio. This study provides a new approach to modify the microstructure of CSCs and a method for preparing dual-grained cermets.

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Section: Introductionmentioning

confidence: 64%

“…(Ti, W)C platelets were first observed via the carbonization of η phases. Similarly, WC platelets were observed during the carbonization of Co 6 W 6 C or in (Ti, W)C/(Ti, W)(C, N)–Ni systems . However, unlike WC twins, (Ti, M)C twins have high stacking‐fault energies (ie, TiC twins: 130‐300 mJ/m 2 ).…”

Section: Resultsmentioning

confidence: 88%

Dual‐grained (Ti, W)C–Ni cermets by two‐step carbonization: Hot isotropic press sintering of NiTiW alloys and colloidal graphite

Xiong

Yue

et al. 2018

J Am Ceram Soc

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“…The results show that both the increase in carbide concentration and the decrease in size are beneficial for wear resistance. Kwon H et al [ 23 ] prepared highly toughened TiC-Ni type cermet using nano-TiC and WC powders. The data show that enhanced toughness is due to solid–solution strengthening of the carbide phase, combined with WC whisker reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano-Y2O3 on the Microstructure and Properties of WC-Reinforced Ni-Based Composite Surfacing Layer

Zhengjun

Zou

et al. 2022

Materials

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In this study, a WC-reinforced Ni-based surfacing layer was prepared on Q235 steel plate by plasma arc welding. The effects of nano-Y2O3 with different contents (0 wt.%, 0.4 wt.%, 0.8 wt.%, 1.2 wt.%, and 1.6 wt.%) on the microstructure, phase composition, microhardness, and wear resistance of the surfacing layer were studied by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), microhardness test, and pin-on-disk test. The results show that the phase composition of the surfacing layer was γ-Ni, FeNi3 solid solution, WC, W2C, M23C6, M6C, Cr7C3, and other carbides. When the addition of nano-Y2O3 was 1.2 wt.%, it has a good improvement on microstructure grain refinement and carbide hard-phase increase. Compared with other contents, 1.2 wt.% nano-Y2O3 surfacing layer has the highest microhardness and the lowest friction coefficient and wear loss. At this time, the wear mechanism is abrasive wear accompanied by slight adhesive wear.

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“…Fortunately, the method of in situ synthesis can effectively avoid these problems [12]. Many scholars have been investigated carbide reinforced metal matrix composites by using the in situ synthesised method [13][14][15][16]. Zhong [17] studied microstructural and mechanical properties of in situ WC-Fe/Fe composite.…”

Section: Introductionmentioning

confidence: 99%

In situ synthesised WC reinforced nickel coating by laser cladding

Shu

Yao

et al. 2018

Surface Engineering

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Using tungsten, carbon, and nickel powder as raw materials, an in situ synthesised WC reinforced nickel matrix (marked as IWC) coating was fabricated on a mild steel by laser cladding. The experimental results showed that a large number of WC particles were in situ synthesised and homogeneously distributed in the coating with free of pores and cracks. Compared with the steel substrate, an improvement of micro-hardness value (2.6 times) was observed for the IWC coating. Sliding wear test showed that the IWC coating has stable friction coefficient, and possesses higher anti-wear property under 300 N than ex situ WC reinforced coating.

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Preparation of a highly toughened (Ti,W)C-20Ni cermet through in situ formation of solid solution and WC whiskers

Cited by 26 publications

References 18 publications

Dual‐grained (Ti, W)C–Ni cermets by two‐step carbonization: Hot isotropic press sintering of NiTiW alloys and colloidal graphite

Dual‐grained (Ti, W)C–Ni cermets by two‐step carbonization: Hot isotropic press sintering of NiTiW alloys and colloidal graphite

Effect of Nano-Y2O3 on the Microstructure and Properties of WC-Reinforced Ni-Based Composite Surfacing Layer

In situ synthesised WC reinforced nickel coating by laser cladding

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