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Meeting Materials Science & Technology 2020
Symposium Ceramic and Crystal Materials for Optics and Photonics
Presentation Title Microstructural Evolution and Cantilever Bending of AlON Transparent Ceramics
Author(s) Ying Shi
On-Site Speaker (Planned) Ying Shi
Abstract Scope In this paper,the microstructure evolution process of AlON transparent ceramics during densification were systemically investigated. It was found that binary twin structure is ubiquitous in the synthesized powder particles. The EBSD results show that the twin structure has the same orientation difference of {111}/60. A large number of dislocations are accumulated around the twin boundary, and the dislocation density is about 6.023 1015 m-2, It was found by EBSD that a ternary twin crystal with a novel sandwich structure appeared in the AlON ceramics in addition to the binary twins. The misorientation of the sandwich-like twins was completely consistent with that of the twins in the powder, which is {111}/60. The high-resolution EBSD technique is used to obtain the residual stress distribution in the twins in powder and ceramics.Through the cantilever beam bending test, the stress-strain curves of the AlON cantilever beams with three different interfaces were obtained.


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