Study on the dynamic fracture toughness of laminated fine ceramic composites based on fatigue damage accumulation theory
by Wei Shen; Peipei Mu
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 17, No. 2/3, 2024

Abstract: By using sintering technology to prepare laminated fine ceramic composite materials, this paper uses a Vickers hardness tester for dynamic fracture toughness testing, and uses fatigue cumulative damage theory to calculate the cumulative damage value of the material under different loads to analyse the dynamic fracture toughness of the material under different conditions. The experimental results show that increasing an appropriate amount of SiO₂ content can improve the dynamic fracture toughness of the material, with the optimal SiO₂ content being 2.0wt%. Moderately increasing the sintering temperature can reduce the cumulative damage value of the material, thereby improving the dynamic fracture toughness of the material. The optimal sintering temperature is 1,700°C; at the same time, appropriately extending the insulation time can also improve the dynamic fracture toughness of the material, and the optimal insulation time is 40 minutes. In addition, considering economic factors, the optimal sintering pressure should be 30 MPa.

Online publication date: Mon, 15-Apr-2024

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