Abstract
Fracture toughness behaviour of [Al/Si3N4/Al2O3]P Nanocomposites was examined in the current research work. The nanocomposites were fabricated using powder metallurgical route for various compositions under the compacting pressure of 12.06 MPa and at a sintering temperature of 650 °C. The fracture toughness for all sample compositions estimated for longitudinal direction was accessed through apparent fracture toughness (KQ), Equivalent energy fracture toughness (Kee) and J integral (J) measurement. The result revealed the exceptionally good fracture toughness parameters (KQ-17.6 MPa√m, Kee-20.5 MPa√m and J integral-3.9 kJ/m2) of 2 wt% mixed Al2O3 and Si3N4 as compared to the pure sintered sample (KQ-10.7 MPa√m, Kee-13.4 MPa√m and J integral-1.0 kJ/m2). The fracture toughness parameters for 2 wt% mix Al2O3 and Si3N4 were observed to be maximum out of all sample compositions ranging from P to M3, substantiating the role of transgranular ductile fracture mechanism as compared to the rest of the samples where the transgranular brittle fracture was dominant.
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Kothiyal, P., Joshi, A., Mer, K.K.S. et al. Influence of Al2O3 and Si3N4 Nano-particulates on Fracture Toughness Behaviour of Sintered Aluminium. Trans Indian Inst Met 75, 199–215 (2022). https://doi.org/10.1007/s12666-021-02411-6
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DOI: https://doi.org/10.1007/s12666-021-02411-6