ZHAO Fangnan ¹, XIE Zhipeng ^{1, 2}
(1. Jingdezhen Ceramic University, Jingdezhen 333043, Jiangxi, China; 2. School of Materials
Science and Engineering, Tsinghua University, Beijing 100084, China)

Abstract: High temperature superplastic ceramics or ceramic high temperature superplasticity means that polycrystalline ceramic materials exhibit high elongation ability at high temperatures at under applied stresses without necking or cavities during tensile process. The maximum tensile superplastic deformation rate of ceramics with fine grain microstructure can
reach 1053%. A large number of studies indicated that, in addition to tensile or compression deformation, ceramics can also achieve a specific shape similar to that of metals. Generally, grain boundary slip is considered to be the mechanism of ceramic superplasticity, while dislocation slip and creep also play an important role. The development and mechanism of superplastic ceramics are summarized. The superplastic properties and variation of oxide, non-oxide and various composite ceramics have been discussed. The tensile and compression deformation capacities of these ceramics under different conditions are summarized.
Keywords:superplasticity; ceramics; tensile-compressive deformation; strain rate; superplastic forming