Knowledge Management System Of Institute of metal research，CAS
| Ice-templated porous tungsten and tungsten carbide inspired by natural wood | |
| Zhang, Yuan; Tan, Guoqi; Jiao, Da; Zhang, Jian; Wang, Shaogang; Liu, Feng; Liu, Zengqian; Zhuo, Longchao; Zhang, Zhefeng; Deville, Sylvain; Ritchie, Robert O. | |
| 2020-05-15 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| Volume | 45Pages:187-197 |
| Abstract | The structures of tungsten and tungsten carbide scaffolds play a key role in determining the properties of their infiltrated composites for multifunctional applications. However, it is challenging to construct and control the architectures by means of self-assembly in W/WC systems because of their large densities. Here we present the development of unidirectionally porous architectures, with high porosities exceeding 65 vol.%, for W and WC scaffolds which in many respects reproduce the design motif of natural wood using a direct ice-templating technique. This was achieved by adjusting the viscosities of suspensions to retard sedimentation during freezing. The processing, structural characteristics and mechanical properties of the resulting scaffolds were investigated with the correlations between them explored. Quantitative relationships were established to describe their strengths based on the mechanics of cellular solids by taking into account both inter- and intra-lamellar pores. The fracture mechanisms were also identified, especially in light of the porosity. This study extends the effectiveness of the ice-templating technique for systems with large densities or particle sizes. It further provides preforms for developing new nature-inspired multifunctional materials, as represented by W/WC-Cu composites. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| DOI | 10.1016/j.jmst.2019.10.021 |
| WOS ID | WOS:000526956200020 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/82852 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Zhang, Yuan,Tan, Guoqi,Jiao, Da,et al. Ice-templated porous tungsten and tungsten carbide inspired by natural wood[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,45:187-197. |
| APA | Zhang, Yuan.,Tan, Guoqi.,Jiao, Da.,Zhang, Jian.,Wang, Shaogang.,...&Ritchie, Robert O..(2020).Ice-templated porous tungsten and tungsten carbide inspired by natural wood.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,45,187-197. |
| MLA | Zhang, Yuan,et al."Ice-templated porous tungsten and tungsten carbide inspired by natural wood".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 45(2020):187-197. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment