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Lightweight and stiff cellular ceramic structures by ice templating

机译:通过冰模板制作轻巧而坚固的多孔陶瓷结构

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摘要

Porous, strong, and stiff ceramic materials are required for a range of technical applications, involving for instance, liquid or gas flow. Natural materials such as wood can provide useful structural guidelines for the optimal microstructural design, although only few processing routes are able to turn these guidelines into actual materials. We illustrate here, how ice templating of anisotropic particle suspensions can be modified to obtain a honeycomb structure with pores of 30 μm diameter. The growth of ice crystals in the slurry induces self-assembly of the anisotropic particles, leading to relatively thin walls (10 μm). Because large anisotropic particles are difficult to sinter, a glassy phase was introduced to facilitate this densification step and then to further reduce the walls' porosity. Young's modulus and compressive strength were both improved by the addition of a glassy phase by an order of magnitude due to the denser walls. These macroporous materials are more robust and stiff than materials with an equivalent morphology, while offering a simple alternative to the current wood replica processing routes.
机译:对于一系列技术应用(例如涉及液体或气体的流动),需要使用多孔,坚固和坚硬的陶瓷材料。天然材料(例如木材)可以为最佳的微结构设计提供有用的结构准则,尽管只有很少的加工路线能够将这些准则转变为实际材料。我们在这里说明如何改变各向异性颗粒悬浮液的冰样以获得具有30μm直径的孔的蜂窝结构。浆液中冰晶的生长引起各向异性颗粒的自组装,从而导致壁相对较薄(10μm)。由于大的各向异性颗粒难以烧结,因此引入玻璃相以促进该致密化步骤,然后进一步降低壁的孔隙率。杨氏模量和抗压强度都通过增加玻璃相而得以改善,这是由于壁更致密。这些大孔材料比具有相同形态的材料更坚固,更硬,同时提供了替代当前木材仿品加工路线的简单方法。

著录项

  • 来源
    《Journal of Materials Research》 |2014年第2期|175-181|共7页
  • 作者单位

    Laboratoire de Synthese et Fonctionnalisation des Ceramiques, UMR3080 CNRS/Saint-Gobain, Cavaillon, France and Universite de Lyon, INSA-Lyon, MATEIS CNRS UMR5510, Villeurbanne, France;

    Universite de Lyon, INSA-Lyon, MATEIS CNRS UMR5510, Villeurbanne, France;

    Laboratoire de Synthese et Fonctionnalisation des Ceramiques, UMR3080 CNRS/Saint-Gobain, Cavaillon, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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