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IT Home reported on July 27 that in the early morning of July 26, Beijing time, Science published a new article entitled "Borrowed dislocations for ductility in ceramics (Realizing tensile plastic deformation of ceramics by dislocation mechanism)” was published online.

This research achievement was jointly completed by the research team of Chen Kexin from the State Key Laboratory of Advanced Metal Materials of University of Science and Technology Beijing, the team of Professor Wang Jinshu from Beijing University of Technology, and the team of Professor Huang Mingxin from the University of Hong Kong (in order of corresponding author).The world's first room temperature tensile plasticity of ceramics was achieved。

According to the official introduction of the University of Science and Technology Beijing, advanced ceramic materials have become key materials for the development of many high-tech fields due to their excellent properties such as high temperature resistance, corrosion resistance, high hardness and low density.However, the poor reliability caused by the intrinsic brittleness of ceramic materials has seriously restricted the further development of ceramic materials.Therefore, the research on toughening and plasticizing of ceramic materials has always been the core content and cutting-edge technology in this field, and it is also one of the most difficult and challenging topics.

Image source: Pexels

Recently, Chen Kexin's research team, based on the realization of ceramic compression plasticity, joined hands with Professor Wang Jinshu of Beijing University of Technology and Professor Huang Mingxin of Hong Kong University toThe strategy of "borrowing dislocations" from metals was proposed for the first time, further realizing the large deformation tensile plasticity of ceramics.The tensile deformation of the ceramic can reach 39.9% and the strength is about 2.3 GPa, which overturns the traditional perception that "ceramics cannot have tensile plasticity".

▲La2O3 ceramics with ordered interface structure successfully "borrow" dislocations from metals and achieve ceramic stretching and bending deformation

IT Home learned that Beijing University of Science and Technology is the first corresponding author of the paper, and Researcher Chen Kexin is the first corresponding author of the paper. Professor Wang Jinshu of Beijing University of Technology and Professor Huang Mingxin of the University of Hong Kong are co-corresponding authors. Dong Liran, Zhang Jie and Li Yizhuang are co-first authors, and the author, Associate Researcher Gao Yixuan, provided theoretical calculation support for this work. Beijing University of Science and Technology, Beijing University of Technology, Ningbo Yongjiang Laboratory and the University of Hong Kong are the cooperative units for this work.

The paper link is as follows: