Ice-templated porous alumina structures
Ice-templated porous alumina structures
复制标题
DOI：
10.1016/j.actamat.2006.11.003
复制
发表时间：
2007-04-01
期刊：
影响因子：
9.4
通讯作者：
Tomsia, Antoni P.
中科院分区：
文献类型：
--
作者：
Deville, Sylvain;Saiz, Eduardo;Tomsia, Antoni P.
规则图案的形成是许多涉及铸造材料的凝固过程的共同特征。我们在这里描述了如何通过控制陶瓷浆料的冷冻以及随后的冰升华和烧结来在多孔氧化铝中获得规则图案，从而形成具有均匀且明确的结构的多层多孔氧化铝结构。我们讨论了实验结果、冰的物理特性以及定向冷冻过程中惰性颗粒与凝固前沿之间的相互作用之间的关系。冰的各向异性界面动力学导致结构中出现许多特定的形态特征。这里获得的结构可以有许多应用，包括陶瓷过滤器和生物材料，并且可以成为用选定的第二相渗透后致密多层复合材料的基础。 (c) 2006 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
The formation of regular patterns is a common feature of many solidification processes involving cast materials. We describe here how regular patterns can be obtained in porous alumina by controlling the freezing of ceramic slurries followed by subsequent ice sublimation and sintering, leading to multilayered porous alumina structures with homogeneous and well-defined architecture. We discuss the relationships between the experimental results, the physics of ice, and the interaction between inert particles and the solidification front during directional freezing. The anisotropic interface kinetics of ice leads to numerous specific morphological features in the structure. The structures obtained here could have numerous applications, including ceramic filters and biomaterials, and could be the basis for dense multilayered composites after infiltration with a selected second phase. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.