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Intrinsic hardness of constitutive phases in WC-Co composites: Nanoindentation testing, statistical analysis, WC crystal orientation effects and flow stress for the constrained metallic binder Roa Rovira, Joan Josep Jiménez Piqué, Emilio Verge, C. Tarragó Cifre, Jose María Mateo García, Antonio Manuel Fair, Jonathan Llanes Pitarch, Luis Miguel Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Fiabilitat i Micromecànica dels Materials Àrees temàtiques de la UPC::Enginyeria dels materials Nanotechnology Carbides Composite materials Nanoindentation Statistical indentation WC-Co Cemented carbide Cermets cemented carbides tungsten carbide instrumented indentation fracture-toughness elastic-modulus deformation hardmetals size microstructure cermets Materials compostos Carburs Nanotecnologia Assaigs de materials The intrinsic hardness of the constitutive phases in WC-Co composites is investigated by combining experimental and statistical analysis nanoindentation techniques. It is done on the basis of considering the cemented carbide material as effectively heterogeneous at the microstructure scale, i.e. consisting of three phases defined by either different chemical nature (carbides and binder) or distinct carbide crystal orientation (i.e. with surface normal perpendicular to either basal or prismatic planes). As main outcome, experimentally measured and statistically significant intrinsic hardness values for the defined phases (WC and constrained metallic binder) are analyzed and determined. Besides the evidence of crystal anisotropy for the WC phase, they permit to identify and account the expected strengthening of the plastic-constrained metallic binder, a critical input parameter for hardness and toughness modelling as well as for microstructural design optimization of ceramic composites reinforced by ductile metallic ligaments. (C) 2015 Elsevier Ltd. All rights reserved. Postprint (published version) 2015-11-01 Article Roa, J.J., Jimenez-Pique, E., Verge, C., Tarrago, J., Mateo, A., Fair, J., Llanes, L. Intrinsic hardness of constitutive phases in WC-Co composites: Nanoindentation testing, statistical analysis, WC crystal orientation effects and flow stress for the constrained metallic binder. "Journal of the european ceramic society", 01 Novembre 2015, vol. 35, núm. 13, p. 3419-3425. 0955-2219 https://hdl.handle.net/2117/80298 10.1016/j.jeurceramsoc.2015.04.021 eng http://www.sciencedirect.com/science/article/pii/S0955221915001843 http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access 7 p. application/msword Elsevier