Chromium segregation at phase boundaries in Cr-doped WC-Co cemented carbides

Yousfi, Mohamed Amine; Norgren, Susanne; Andrén, Hans-Olof; Falk, L.K.L.

doi:10.1016/j.matchar.2018.06.034

Cited by 15 publications

(5 citation statements)

References 25 publications

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“…This is mainly attributed to the fact that with the increase in addition, V and Cr atoms enter the lattice interstitials of WC, resulting in an increase in the crystal plane spacing. With a further increase in the addition amount, V and Cr precipitated out after reaching the maximum solubility and the crystal plane spacing decreased [39].…”

Section: Phase Composition and Bonding Statementioning

confidence: 99%

Effect of Metal Elements on Microstructure and Mechanical Properties of Ultrafine Cemented Carbide Prepared by SPS

Jiang,

Fu,

Zhang

et al. 2024

Molecules

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To satisfy the needs of precision machining, ultrafine tungsten carbide (WC)-based cemented carbide with fine grain size and excellent mechanical properties was prepared. Ultrafine cemented carbide was prepared by spark plasma sintering (SPS) using WC, Co as raw materials and metal elements V, and Cr as additives, and the effects of metal elements on the microstructure and mechanical properties of cemented carbide were investigated. The results show that the specimen (91.6WC-1.2V-1.2Cr-6Co) prepared at 1350 °C, 6 min, 25 MPa has the best mechanical properties (HV 2322.9, KIC 8.7 MPa·m1/2) and homogeneous microstructure. The metal elements could react with WC to form a (W, V, Cr) Cx segregation layer, which effectively inhibits the growth of WC grains (300 nm). The combination of SPS and metal element additives provides a new approach for the preparation of ultrafine cemented carbides with excellent properties.

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Section: Phase Composition and Bonding Statementioning

confidence: 99%

Effect of Metal Elements on Microstructure and Mechanical Properties of Ultrafine Cemented Carbide Prepared by SPS

Jiang,

Fu,

Zhang

et al. 2024

Molecules

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“…The addition of Cr to a WC-Co material is well known to be a WC grain growth inhibitor [22,23]. Atom probe tomography has shown that chromium segregates to WC/Co phase boundaries [47]. The equilibrium segregation of Cr in the binder phase was estimated to 0.4 monolayer in material heat treated at 1000 • C, and the energy of segregation was calculated to 0.22 eV/Cr atom (21 kJ/mol Cr) from the atom probe data.…”

Section: Effect Of Chromium: 1000 • Cmentioning

confidence: 99%

Creep of Un-Doped and Cr-Doped Wc-Co at High Temperature and High Load

Yousfi¹,

Nordgren²,

Norgren³

et al. 2023

Preprint

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“…Some impurity elements such as Cr and V can significantly improve creep resistance when blended in small concentrations (generally <1 wt.%). This has been related to formation of thin (Cr/V,W)C layers on the surface of WC grains [10]. This surface layer may inhibit deformation by preventing cobalt from infiltrating boundaries.…”

Section: Introductionmentioning

confidence: 99%