A novel strategy for fabricating biomimetic gradient metal-ceramic composites by dynamic freeze casting and pressure infiltration

A novel strategy for fabricating biomimetic gradient metal-ceramic composites by dynamic freeze casting and pressure infiltration
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动态冷冻铸造和压力渗透制备仿生梯度金属陶瓷复合材料的新策略

DOI:
10.1016/j.scriptamat.2019.04.004
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发表时间:
2019-07
期刊:
影响因子:
6
通讯作者:
Jiang Qi Chuan
Jiang Qi Chuan
中科院分区:
材料科学1区
文献类型:
--
作者:
Yang Li Kai;Shen Ping;Guo Rui Fen;Li Yun Liang;Jiang Qi Chuan

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提出了动态冷冻铸造与压力浸渗相结合的新策略,成功制备了鹿角状梯度金属陶瓷复合材料。以Al-7Si-5Cu/Al 2 O3为例,由于其成分和结构梯度以及精细的层状显微结构,所得复合材料表现出外部硬、强和耐磨但内部软和坚韧的独特机械性能。该研究为设计和制备具有仿生结构特征和特殊性能的功能梯度材料提供了一种可行的,灵活的和可扩展的方法。
We proposed a new strategy of combining dynamic freeze casting with pressure infiltration and successfully prepared an antler-bone-inspired gradient metal-ceramic composite. As exemplified by Al-7Si-5Cu/Al2O3, the resultant composite exhibits the unique mechanical properties of being externally hard, strong, and wear-resistant but internally soft and tough owing to its compositional and structural gradients and delicate lamellar microstructures. This study offers a feasible, flexible, and scalable approach to designing and preparing functionally gradient materials with biomimetic structural features and exceptional properties.
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