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Assessment in Si3N4 of a new method for determining the fracture toughness from a surface notch micro-machined by ultra-short pulsed laser ablation
Turón Viñas, Miquel; Anglada Gomila, Marc
Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural i Fiabilitat dels Materials
The determination of the fracture toughness in a well characterized gas pressure sintered silicon nitride by the single edge V-notch beam method is analyzed in specimens with a surface shallow sharp notch produced by ultra-short pulsed laser ablation. The fracture surfaces and the damage in front of the notch tip are analyzed in detail by using focus ion beam/scanning electron microscopy and micro-Raman spectroscopy. It is concluded that the fracture toughness can be successfully determined by this technique and its importance for nano-grain size ceramics is outlined
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials
Ceramic materials
Fracture mechanics.
Materials ceràmics
Materials -- Fatiga
Attribution-NonCommercial-NoDerivs 3.0 Spain

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