The use of niobium carbide as grain growth inhibitor in WC-10Co cemented carbides

[en] A key parameter in the processing of tungsten carbide materials is the control of the grain growth during the sintering stage. To limit the grain coarsening, grain growth inhibitors are added during the mixing of the powders. Those are transition metal carbides (vanadium, chromium, niobium, molybdenum) that are added in small amounts. Niobium carbide is an efficient GGI and can bring enhanced fracture toughness and reasonable hardness. The influence of niobium carbide (alone or with a combination of other inhibitors) on the grain growth was studied. To ensure a good homogeneity, a two-step ball milling was carried out: the first with cobalt and inhibitors, the second with WC and the doped-cobalt powder. The powders were sintered by vacuum sintering before the characterization of mechanical properties such as hardness and toughness. Niobium carbide is found to be an effective inhibitor since the mechanical properties are superior compared to the other inhibitors. Hardness and fracture toughness are 1858 ± 31 HV30 and 9.8 ± 0.2 MPa√m for NbC alone and 1930 ± 22 HV30 and 9.4 ± 0.3 MPa√m for the mixture NbC+Cr3C2 respectively.

Research center :

CRIM - Ingénierie des matériaux

Disciplines :

Materials science & engineering

Author, co-author :

Mégret, Alexandre ; Université de Mons - UMONS > Faculté Polytechnique > Service de Métallurgie

Vitry, Véronique ; Université de Mons - UMONS > Faculté Polytechnique > Service de Métallurgie

Delaunois, Fabienne ; Université de Mons - UMONS > Faculté Polytechnique > Service de Métallurgie

Language :

English

Title :

The use of niobium carbide as grain growth inhibitor in WC-10Co cemented carbides

Publication date :

November 2025

Journal title :

Journal of the European Ceramic Society

ISSN :

0955-2219

Publisher :

Elsevier Ltd

Volume :

Issue :

Pages :

117533

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://api.elsevier.com/content/article/PII:S095522192500353X?httpAccept=text/xml

Research unit :

F601 - Métallurgie

Research institute :

R400 - Institut de Recherche en Science et Ingénierie des Matériaux

Available on ORBi UMONS :

since 20 May 2025

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Bibliography

García, J., Ciprés, V.C., Blomqvist, A., Kaplan, B., Cemented carbide microstructures: a review. Int J. Refract Met. Hard Mater. 80 (2019), 40–68, 10.1016/j.ijrmhm.2018.12.004.
Upadhyaya, G.S., Materials science of cemented carbides — an overview. Mater. Des. 22:6 (2001), 483–489, 10.1016/S0261-3069(01)00007-3.
Schwarzkopf, P., Kieffer, R., Leszynski, W., Benesovsky, F., Cemented Carbides. 1960, The MacMillan Company, New York.
Chokshi, A.H., Rosen, A., Karch, J., Gleiter, H., On the validity of the Hall-Petch relationship in nanocrystalline materials. Scr. Mater. 23 (1989), 1679–1684, 10.1016/j.egypro.2009.02.265.
Pötschke, J., Richter, V., Gestrich, T., Säuberlich, T., Meese-Marktscheffel, J.A., Grain growth inhibition in ultrafine hardmetals. Int J. Refract Met. Hard Mater. 66 (2017), 95–104, 10.1016/j.ijrmhm.2017.03.001.
Farag, S., Konyashin, I., Ries, B., The influence of grain growth inhibitors on the microstructure and properties of submicron, ultrafine and nano-structured hardmetals – A review. Int J. Refract Met. Hard Mater. 77:February (2018), 12–30, 10.1016/j.ijrmhm.2018.07.003.
Lauter, L., Hochenauer, R., Buchegger, C., Bohn, M., Lengauer, W., Solid-state solubilities of grain-growth inhibitors in WC-Co and WC-MC-Co hardmetals. J. Alloy. Compd. 675 (2016), 407–415, 10.1016/j.jallcom.2016.03.117.
Huang, S.G., Li, L., Vanmeensel, K., Van der Biest, O., Vleugels, J., VC, Cr3C2 and NbC doped WC-Co cemented carbides prepared by pulsed electric current sintering. Int J. Refract Met. Hard Mater. 25:5–6 (2007), 417–422, 10.1016/j.ijrmhm.2006.11.003.
Liu, X., Song, X., Wang, H., Liu, X., Tang, F., Lu, H., Complexions in WC-Co cemented carbides. Acta Mater. 149 (2018), 164–178, 10.1016/j.actamat.2018.02.018.
Huang, S.G., Liu, R.L., Li, L., Van der Biest, O., Vleugels, J., NbC as grain growth inhibitor and carbide in WC-Co hardmetals. Int J. Refract Met. Hard Mater. 26:5 (2008), 389–395, 10.1016/j.ijrmhm.2007.09.003.
Zhou, W., et al. The effect of NbC on mechanical properties and fracture behavior of WC-10Co cemented carbides. Int J. Refract Met. Hard Mater. 50 (2015), 72–78, 10.1016/j.ijrmhm.2014.11.006.
Acchar, W., de Macedo, H.R., Influence of NbC-addition on mechanical properties of WC-Co. Mater. Sci. Forum 498–499 (2005), 363–368.
Suzuki, H., Yamamoto, T., Effects of Carbon Content on the Properties of Sintered WC-NbC-10%Co Alloys. Trans. Jpn. Inst. Met. 9 (1968), 77–82.
Weidow, J., Andrén, H.O., Grain and phase boundary segregation in WC-Co with TiC, ZrC, NbC or TaC additions. Int J. Refract Met. Hard Mater. 29:1 (2011), 38–43, 10.1016/j.ijrmhm.2010.06.010.
Xiao, D., He, Y. hui, Luo, W. hong, Song, M., Effect of VC and NbC additions on microstructure and properties of ultrafine WC-10Co cemented carbides. Trans. Nonferrous Met. Soc. China (Engl. Ed. ) 19:6 (2009), 1520–1525, 10.1016/S1003-6326(09)60063-7.
Yu, H., Li, W.N., Jiang, X.Q., Jiao, P.H., Effect on the Microstructure and Properties of WC-10% Co Alloy Co-Doped with NbC and Cr3C2. Adv. Mat. Res 621 (2012), 58–61, 10.4028/www.scientific.net/AMR.621.58.
Stanciu, V.I., Vitry, V., Delaunois, F., Influence of the milling parameters on the sintering behaviour of WC-Co composites. Mater. Manuf. Process. 00 (2020), 1–6, 10.1080/10426914.2020.1743850.
Wang, X., Fang, Z.Z., Sohn, H.Y., Grain growth during the early stage of sintering of nanosized WC-Co powder. Int J. Refract Met. Hard Mater. 26:3 (2008), 232–241, 10.1016/j.ijrmhm.2007.04.006.
Azcona, I., Ordóñez, A., Sánchez, J.M., Castro, F., Hot isostatic pressing of ultrafine tungsten carbide-cobalt hardmetals. J. Mater. Sci. 37:19 (2002), 4189–4195, 10.1023/A:1020048105585.
Pötschke, J., Gestrich, T., Richter, V., Grain growth inhibition of hardmetals during initial heat-up. Int J. Refract Met. Hard Mater. 72:December 2017 (2018), 117–125, 10.1016/j.ijrmhm.2017.12.016.
Pötschke, J., Richter, V., Holke, R., Influence and effectivity of VC and Cr3C2 grain growth inhibitors on sintering of binderless tungsten carbide. Int J. Refract Met. Hard Mater. 31 (2012), 218–223, 10.1016/j.ijrmhm.2011.11.006.
Schubert, W.D., Neumeister, H., Kinger, G., Lux, B., Hardness to toughness relationship of fine-grained WC-Co hardmetals. Int J. Refract Met. Hard Mater., 16(2), 1998, 10.1016/S0263-4368(98)00028-6.