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Architected cellular ceramics with tailored stiffness via direct foam writing.

Abstract：

:Hierarchical cellular structures are ubiquitous in nature because of their low-density, high-specific properties, and multifunctionality. Inspired by these systems, we created lightweight ceramic architectures composed of closed-cell porous struts patterned in the form of hexagonal and triangular honeycombs by direct foam writing. The foam ink contains bubbles stabilized by attractive colloidal particles suspended in an aqueous solution. The printed and sintered ceramic foam honeycombs possess low relative density (∼6%). By tailoring their microstructure and geometry, we created honeycombs with different modes of deformation, exceptional specific stiffness, and stiffness values that span over an order of magnitude. This capability represents an important step toward the scalable fabrication of hierarchical porous materials for applications, including lightweight structures, thermal insulation, tissue scaffolds, catalyst supports, and electrodes.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Muth JT,Dixon PG,Woish L,Gibson LJ,Lewis JA

doi

10.1073/pnas.1616769114

subject

Has Abstract

pub_date

2017-02-21 00:00:00

pages

1832-1837

issue

8

eissn

0027-8424

issn

1091-6490

pii

1616769114

journal_volume

114

pub_type

杂志文章

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