Study on mechanical properties of hot pressing sintered mullite-ZrO2 composites with finite element method |
| |
Authors: | Hui Yu Yongjun Chen Xiaodong Guo Lijie Luo Jianbao Li Wei Li Zhichao Xu Tianfeng Li Gaolong Wu |
| |
Affiliation: | State Key Laboratory of Marine Resource Utilization in South China Sea, College of Materials & Chemical Engineering, Hainan University, Haikou 570228, China |
| |
Abstract: | In this study, mullite–zirconia (ZrO2) composites were fabricated by hot pressing sintering method. The effects of sintering temperature and holding time on the microstructures, phase compositions and mechanical properties of the composites were investigated. The results indicated that the size of t-ZrO2 grain varies with sintering temperature and holding time, and the maximum flexural strength of 674.05?MPa and fracture toughness of 12.08?MPam1/2 are obtained when the sintering temperature is 1500?°C with holding times of 20 and 60?min, respectively. Finite element method was employed to analyze the relationship between grain size and mechanical properties of mullite–ZrO2 composites for the first time. The results showed that the maximum stress on mullite–ZrO2 interface increases with the growth of t-ZrO2 grain size, which enhances the generation and propagation of cracks on grain boundaries significantly and degrades the flexural strength and fracture toughness of the mullite–ZrO2 composite ceramics. |
| |
Keywords: | Mullite Hot pressing Mechanical properties Finite element analysis Grains and interfaces |
本文献已被 ScienceDirect 等数据库收录! |