Defects in flash-sintered ceramics and their effects on mechanical properties
| Autor: | Xin Li Phuah, Xinghang Zhang, Amiya K. Mukherjee, Haiyan Wang, Jaehun Cho, Thomas Tsakalakos |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Stress–strain curve Sintering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences 0104 chemical sciences Deformation mechanism Flash (manufacturing) visual_art Electric field visual_art.visual_art_medium General Materials Science Grain boundary Ceramic Physical and Theoretical Chemistry Composite material 0210 nano-technology |
| Zdroj: | MRS Bulletin. 46:44-51 |
| ISSN: | 1938-1425 0883-7694 |
| Popis: | The effects of electric field and current during flash sintering have resulted in nonequilibrium microstructures that are not typically observed in conventionally sintered ceramics. In this article, we review the recent findings on the unique microstructural characteristics observed in flash-sintered ceramics and their impacts on mechanical properties. Gradient microstructures across flash-sintered samples are frequently observed and have been investigated using a variety of in situ techniques to monitor the dynamic evolutions in real time. Other microstructural characteristics, such as high-density dislocations and stacking faults, and chemical segregations along grain boundaries, have been reported in flash-sintered ceramics. These defects have been observed in several ceramic systems and were shown to enhance the mechanical properties through defect-mediated inelastic deformation mechanisms. In situ studies on the temperature-dependent transition of deformation mechanisms are also highlighted. |
| Databáze: | OpenAIRE |
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