Microstructure control of SiCw/SiC composites based on SLS technology

The preparation of SiCw/SiC materials was realized by SLS technology. The effect of SiC powder size on the number and size of SiC whisker formation was investigated. The tortuosity and diameter of open pores are introduced to modify the classical molecular collision model, and the relationship model...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2022-08, Vol.42 (9), p.3747-3758
Main Authors: Lu, Decai, Zhang, Liwei, Cheng, Su, Shi, Dequan, Zhang, Kun, Shao, Wencheng, Lin, Duomu, Zeng, Tao
Format: Article
Language:English
Subjects:
In-situ SiC whiskers
Microstructure control
SiCw/SiC
SLS
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Summary:The preparation of SiCw/SiC materials was realized by SLS technology. The effect of SiC powder size on the number and size of SiC whisker formation was investigated. The tortuosity and diameter of open pores are introduced to modify the classical molecular collision model, and the relationship model between the growth rate of SiC whisker and porosity was established. The influence mechanism of powder size on the number of whisker growth was revealed. According to the model, the number of in-situ whisker growth in powder can be calculated, and the calculated results by using this model agreed with the test results. So it is suitable for in-situ whisker microstructure control under SLS technology, and also suitable for other 3D printed whisker in-situ reinforced ceramic material systems. This is of great significance to expand the application of 3D printing ceramic matrix composites.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2022.03.053