Microstructure control of SiCw/SiC composites based on SLS technology
Microstructure control of SiCw/SiC composites based on SLS technology
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DOI：
10.1016/j.jeurceramsoc.2022.03.053
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发表时间：
2022-04-09
影响因子：
5.7
通讯作者：
Zeng, Tao
中科院分区：
文献类型：
--
作者：
Lu, Decai;Zhang, Liwei;Zeng, Tao
利用SLS技术实现了SiCw/SiC材料的制备。研究了不同粒度的碳化硅粉末对碳化硅晶须数量和大小的影响。引入开孔直径和弯曲度对经典分子碰撞模型进行修正，建立了碳化硅晶须生长速率与孔隙率之间的关系模型。揭示了粉末尺寸对晶须生长数量的影响机理。根据该模型可以计算出粉末中原位晶须生长的个数，计算结果与试验结果吻合较好。因此，它适用于SLS技术下的晶须原位组织控制，也适用于其他3D打印晶须原位增强陶瓷材料体系。这对拓展3D打印陶瓷基复合材料的应用具有重要意义。
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.