Interpenetrating Network-Structured Al2O3鈥揧3Al5O12 Eutectic Composite Grown by Containerlessly Directional Solidification Process

详细信息    查看全文

• 作者：Xiaoguang Ma ; Jianqiang Li ; Zhijian Peng ; Bingqian Ma ; Xiaoyu Li ; Wei Pan ; Longhao Qi
• 刊名：Crystal Growth & Design
• 出版年：2015
• 出版时间：December 2, 2015
• 年：2015
• 卷：15
• 期：12
• 页码：5652-5655
• 全文大小：328K
• ISSN：1528-7505

文摘

Directionally solidified (DS) Al₂O₃/YAG eutectic composites with microstructures of three-dimensionally continuous networks were prepared using containerlessly directional solidification through an aerodynamic levitator. The morphological evolution of DS eutectics was studied at a large growth rate range. The DS eutectics present irregular 鈥淐hinese script鈥?morphologies at growth rates of 9 渭m/s, transforming into complex regular eutectic morphologies with growth rates increasing to 68 渭m/s. At a superhigh crystal growth rate of 800 渭m/s, the DS eutectics showed regular lamellar morphologies. The indentation hardness and Young鈥檚 modulus of DS Al₂O₃/YAG eutectic composites at growth rates of 68 渭m/s are 22.3 and 338 GPa, respectively.