Ice-Templated Porous Tungsten and Tungsten Carbide

37 Pages Posted: 1 Aug 2019

See all articles by Yuan Zhang

Yuan Zhang

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials; Liaoning Shihua University - School of Mechanical Engineering

Guoqi Tan

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials; University of Science and Technology of China (USTC) - School of Materials Science and Engineering

Da Jiao

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

Jian Zhang

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

Shaogang Wang

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

Feng Liu

Liaoning Shihua University - School of Mechanical Engineering

Zengqian Liu

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

Longchao Zhuo

Xi'an University of Technology - School of Materials Science and Engineering

Zhefeng Zhang

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division; Chinese Academy of Sciences (CAS) - University of Chinese Academy of Sciences; University of Science and Technology of China (USTC) - School of Materials Science and Engineering

Sylvain Deville

Saint-Gobain - Laboratoire de Synthèse et Fonctionnalisation des Céramiques

Robert O. Ritchie

University of California, Berkeley - Department of Materials Science and Engineering

Date Written: 2019

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, the architectural construction of W/WC systems is challenging because of the difficulty of assembly due to their large densities. Here we present the generation of unidirectionally porous architectures, with high porosities exceeding 65%, for W and WC scaffolds using direct ice-templating techniques, which in many respects reproduce the design motif of wood. 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 and the correlations between them explored. Quantitative relationships were established to describe their strengths based on a simple model 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 ice-templating techniques 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.

Keywords: Ice-templating, Tungsten, Scaffolds, Fracture mechanisms, Bioinspired materials

Suggested Citation

Zhang, Yuan and Tan, Guoqi and Jiao, Da and Zhang, Jian and Wang, Shaogang and Liu, Feng and Liu, Zengqian and Zhuo, Longchao and Zhang, Zhefeng and Deville, Sylvain and Ritchie, Robert O., Ice-Templated Porous Tungsten and Tungsten Carbide (2019). Available at SSRN: https://ssrn.com/abstract=3427539 or http://dx.doi.org/10.2139/ssrn.3427539

Yuan Zhang

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

China

Liaoning Shihua University - School of Mechanical Engineering

Fushun, 113001
China

Guoqi Tan

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

China

University of Science and Technology of China (USTC) - School of Materials Science and Engineering

96, Jinzhai Road
Hefei, Anhui 230026
China

Da Jiao

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

China

Jian Zhang

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

China

Shaogang Wang

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

China

Feng Liu

Liaoning Shihua University - School of Mechanical Engineering

Fushun, 113001
China

Zengqian Liu

Chinese Academy of Sciences (CAS) - Laboratory of Fatigue and Fracture for Materials

China

Longchao Zhuo (Contact Author)

Xi'an University of Technology - School of Materials Science and Engineering ( email )

China

Zhefeng Zhang

Chinese Academy of Sciences (CAS) - Materials Fatigue and Fracture Division ( email )

52 Sanlihe Rd.
Datun Road, Anwai
Beijing, Xicheng District 100864
China

Chinese Academy of Sciences (CAS) - University of Chinese Academy of Sciences ( email )

Building 7, NO. 80 Zhongguancun Road
Beijing, Beijing 100190
China

University of Science and Technology of China (USTC) - School of Materials Science and Engineering

96 Jinzhai Road
Hefei, Anhui 230026
China

Sylvain Deville

Saint-Gobain - Laboratoire de Synthèse et Fonctionnalisation des Céramiques

Cavaillon, 84306
France

Robert O. Ritchie

University of California, Berkeley - Department of Materials Science and Engineering ( email )

Berkeley, CA
United States

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