期刊
ACTA MATERIALIA
卷 57, 期 10, 页码 2919-2932出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2009.03.003
关键词
Ceramics; Composites; Toughness; Casting
资金
- Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, of the US Department of Energy [DE-AC02-05CH11231]
The notion of replicating the unique fracture resistance of natural composites in synthetic materials has generated much interest but has yielded few real technological advances. Here we demonstrate how using ice-templated structures, the concept of hierarchical design can be applied to conventional compounds such as alumina and poly(methyl methacrylate) (PMMA) to make bulk hybrid materials that display exceptional toughness that can be nearly 300 times higher (in energy terms) than either of their constituents. These toughnesses far surpass what can be expected from a simple rule of mixtures; for a similar to 80% A(2)O(3)-PMMA material, we achieve a K-Jc fracture toughness above 30 MPa m(1/2) at a tensile strength of similar to 200 MPa. Indeed, in terms of specific strength and toughness, these properties for alumina-based ceramics are Lit best comparable to those of metallic aluminum alloys. The approach is flexible and can be readily translated to multiple material combinations. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据