|About this Abstract
||Materials Science & Technology 2019
||Sintering and Related Powder Processing Science and Technologies
||Room Temperature Plasticity in Flash-sintered TiO2
||Jin Li, Jaehun Cho, Jie Ding, Harry Charalambous, Sichuang Xue, Han Wang, Xin Li Phuah, Thomas Tsakalakos, R. Edwin García, Amiya K. Mukherjee, Noam Bernstein, C. Stephen Hellberg, Haiyan Wang, Xinghang Zhang
|On-Site Speaker (Planned)
Ceramic materials have been widely used for structural applications. However, most ceramics have rather limited plasticity at low temperatures. A majority of ceramics fracture well before the onset of plastic yielding. The brittle nature of ceramics arises from the lack of dislocation activity and the need for high stress to nucleate dislocations. Here we have investigated the deformability of TiO2 prepared by a flash-sintering technique. Our in situ studies show that the flash sintered TiO2 can be compressed to ~ 10% strain under room temperature without noticeable crack formation. Distinct deformation behaviors have been observed in flash-sintered TiO2 deformed at different testing temperatures, ranging from room temperature to 600°C. Potential mechanisms that may render ductile ceramic materials are discussed.
||Definite: At-meeting proceedings