Tough, Bio-Inspired Hybrid Materials
Tough, Bio-Inspired Hybrid Materials
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DOI：
10.1126/science.1164865
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发表时间：
2008-12-05
期刊：
影响因子：
56.9
通讯作者：
Ritchie, R. O.
中科院分区：
文献类型：
--
作者：
Munch, E.;Launey, M. E.;Ritchie, R. O.
在合成新的结构材料中模仿自然结构的概念引起了极大的兴趣，但几乎没有取得实际进展。天然复合材料通过复杂的分层设计实现强度和韧性，这些设计非常难以合成复制。我们模仿自然界的增韧机制，将两种普通的化合物，氧化铝和聚甲基丙烯酸甲酯，结合成冰模板结构，其韧性可以超过300倍（在能量方面），其成分。最终产品是块状混合陶瓷基材料，其高屈服强度和断裂韧性[类似于200兆帕（MPa）和类似于30 MPa. m（1/2）]代表与铝合金相当的特定性质。这些模型材料可用于识别关键的微观结构特征，这些特征应指导具有独特强度和韧性的生物启发陶瓷基复合材料的合成。
The notion of mimicking natural structures in the synthesis of new structural materials has generated enormous interest but has yielded few practical advances. Natural composites achieve strength and toughness through complex hierarchical designs that are extremely difficult to replicate synthetically. We emulate nature's toughening mechanisms by combining two ordinary compounds, aluminum oxide and polymethyl methacrylate, into ice- templated structures whose toughness can be more than 300 times ( in energy terms) that of their constituents. The final product is a bulk hybrid ceramic- based material whose high yield strength and fracture toughness [similar to 200 megapascals (MPa) and similar to 30 MPa.m(1/2)] represent specific properties comparable to those of aluminum alloys. These model materials can be used to identify the key microstructural features that should guide the synthesis of bio- inspired ceramic- based composites with unique strength and toughness.