A novel biomimetic approach to the design of high-performance ceramic-metal composites
A novel biomimetic approach to the design of high-performance ceramic-metal composites
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DOI：
10.1098/rsif.2009.0331
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发表时间：
2010-05-06
影响因子：
3.9
通讯作者：
Ritchie, Robert O.
中科院分区：
文献类型：
--
作者：
Launey, Maximilien E.;Munch, Etienne;Ritchie, Robert O.
探讨了将天然生物设计方法推广到新型合成陶瓷-金属复合材料的前景。使用冰模板的陶瓷悬浮液和随后的金属渗透，我们证明了有序的分层设计的概念，可以应用于创建细规模的层压陶瓷-金属（散装）复合材料，是廉价的，重量轻，并显示特殊的损伤容限性能。具体而言，Al 2 O3/Al-Si层压板与陶瓷含量高达约40体积%，与薄片厚度低至10毫米进行了处理和表征。这些结构在约300 MPa的拉伸强度下实现了40 MPa均方根m的优异断裂韧性。突出的增韧机制与进一步的增韧策略一起描述。
The prospect of extending natural biological design to develop new synthetic ceramic-metal composite materials is examined. Using ice-templating of ceramic suspensions and subsequent metal infiltration, we demonstrate that the concept of ordered hierarchical design can be applied to create fine-scale laminated ceramic-metal (bulk) composites that are inexpensive, lightweight and display exceptional damage-tolerance properties. Specifically, Al2O3/Al-Si laminates with ceramic contents up to approximately 40 vol% and with lamellae thicknesses down to 10 mm were processed and characterized. These structures achieve an excellent fracture toughness of 40 MPa root m at a tensile strength of approximately 300 MPa. Salient toughening mechanisms are described together with further toughening strategies.