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Fabrication and mechanical behavior of nano-grained LaGdZr2O7 transparent ceramic

Herein, we report transparent LaGdZr2O7 nano-grained ceramics with an average grain size of 10?nm prepared using the high-pressure sintering method at 5.0 GPa/450??C. These ceramics showed improved plastic deformation as compared to transparent micro-grained LaGdZr2O7 ceramics. Moreover, the fracture toughness of the nano-grained ceramics reached up to 3.4 MPam1/2, which is 79?% higher than that of the micro-grained samples. This improvement in the fracture toughness of the nano-grained ceramics was associated with the presence of a large number of weak grain boundaries in them.

» Author: Jirui Deng, Zhangyi Huang, Junpu Wang, Zhe Tang, Hao Liang, Lu Zhang, Tiecheng Lu, Jianqi Qi, Bin Chen, Duanwei He

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