Title: Study on the dynamic fracture toughness of laminated fine ceramic composites based on fatigue damage accumulation theory

Authors: Wei Shen; Peipei Mu

Addresses: College of Craft, Hubei Institute of Fine Arts, WuHan, 430000, HuBei, China ' Sport Science and Technology, College of Wuhan Sports University, WuHan, 430000, HuBei, China

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.

Keywords: fatigue damage; cumulative theory; fine ceramics; composite materials; dynamic fracture toughness; sintering process.

DOI: 10.1504/IJMMP.2024.137981

International Journal of Microstructure and Materials Properties, 2024 Vol.17 No.2/3, pp.249 - 266

Received: 21 Jul 2023
Accepted: 08 Nov 2023
Published online: 15 Apr 2024 *

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