Titanium foams produced by solid-state replication of NaCl powders

Bing Ye; David C. Dunand

doi:10.1016/j.msea.2010.09.054

Titanium foams produced by solid-state replication of NaCl powders

Bing Ye, David C. Dunand^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

94 Scopus citations

Abstract

Open-celled titanium foams were fabricated by vacuum hot pressing of a blend of Ti and NaCl powders followed by NaCl removal in water. Densification kinetics of the Ti/NaCl blends are measured at 780 °C at various pressures (30-50. MPa), NaCl volume fractions (30-70%) and NaCl powder sizes (50-500 μm). As compared to pure Ti powders, densification kinetics of the blends is faster for relative densities below 92% due to rapid deformation of the NaCl powders. After dissolution, the flattened shape of the NaCl powders is replicated in the pores, resulting in an anisotropic porous structure. The foams exhibit good compressive strengths (e.g., 102. MPa for 50% porosity and 28. MPa for 67% porosity), low Young moduli (e.g., 29. GPa for 51% porosity) and ductile behavior up to compressive strain >60%.

Original language	English (US)
Pages (from-to)	691-697
Number of pages	7
Journal	Materials Science and Engineering A
Volume	528
Issue number	2
DOIs	https://doi.org/10.1016/j.msea.2010.09.054
State	Published - Dec 15 2010

Keywords

Composites
Low cost titanium
Porous materials
Powder metallurgy
Sodium chloride

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Titanium foams produced by solid-state replication of NaCl powders",

abstract = "Open-celled titanium foams were fabricated by vacuum hot pressing of a blend of Ti and NaCl powders followed by NaCl removal in water. Densification kinetics of the Ti/NaCl blends are measured at 780 °C at various pressures (30-50. MPa), NaCl volume fractions (30-70%) and NaCl powder sizes (50-500 μm). As compared to pure Ti powders, densification kinetics of the blends is faster for relative densities below 92% due to rapid deformation of the NaCl powders. After dissolution, the flattened shape of the NaCl powders is replicated in the pores, resulting in an anisotropic porous structure. The foams exhibit good compressive strengths (e.g., 102. MPa for 50% porosity and 28. MPa for 67% porosity), low Young moduli (e.g., 29. GPa for 51% porosity) and ductile behavior up to compressive strain >60%.",

keywords = "Composites, Low cost titanium, Porous materials, Powder metallurgy, Sodium chloride",

author = "Bing Ye and Dunand, {David C.}",

note = "Funding Information: This research was supported by the Initiative for Sustainability and Energy at Northwestern. The authors thank Mr. Andrew Ball (Northwestern University) for preliminary feasibility experiments and for assistance with preparing samples shown in Fig. 2 and used for ultrasonic measurements. They also acknowledge Mr. Anselm Neurohr (Northwestern U.) for assistance with compression testing on Ti-foams and Ms. Peiqi Zheng (Northwestern U.) for assistance with SEM imaging for Fig. 3 a and d. ",

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doi = "10.1016/j.msea.2010.09.054",

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pages = "691--697",

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AU - Dunand, David C.

N1 - Funding Information: This research was supported by the Initiative for Sustainability and Energy at Northwestern. The authors thank Mr. Andrew Ball (Northwestern University) for preliminary feasibility experiments and for assistance with preparing samples shown in Fig. 2 and used for ultrasonic measurements. They also acknowledge Mr. Anselm Neurohr (Northwestern U.) for assistance with compression testing on Ti-foams and Ms. Peiqi Zheng (Northwestern U.) for assistance with SEM imaging for Fig. 3 a and d.

PY - 2010/12/15

Y1 - 2010/12/15

N2 - Open-celled titanium foams were fabricated by vacuum hot pressing of a blend of Ti and NaCl powders followed by NaCl removal in water. Densification kinetics of the Ti/NaCl blends are measured at 780 °C at various pressures (30-50. MPa), NaCl volume fractions (30-70%) and NaCl powder sizes (50-500 μm). As compared to pure Ti powders, densification kinetics of the blends is faster for relative densities below 92% due to rapid deformation of the NaCl powders. After dissolution, the flattened shape of the NaCl powders is replicated in the pores, resulting in an anisotropic porous structure. The foams exhibit good compressive strengths (e.g., 102. MPa for 50% porosity and 28. MPa for 67% porosity), low Young moduli (e.g., 29. GPa for 51% porosity) and ductile behavior up to compressive strain >60%.

AB - Open-celled titanium foams were fabricated by vacuum hot pressing of a blend of Ti and NaCl powders followed by NaCl removal in water. Densification kinetics of the Ti/NaCl blends are measured at 780 °C at various pressures (30-50. MPa), NaCl volume fractions (30-70%) and NaCl powder sizes (50-500 μm). As compared to pure Ti powders, densification kinetics of the blends is faster for relative densities below 92% due to rapid deformation of the NaCl powders. After dissolution, the flattened shape of the NaCl powders is replicated in the pores, resulting in an anisotropic porous structure. The foams exhibit good compressive strengths (e.g., 102. MPa for 50% porosity and 28. MPa for 67% porosity), low Young moduli (e.g., 29. GPa for 51% porosity) and ductile behavior up to compressive strain >60%.

KW - Composites

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KW - Porous materials

KW - Powder metallurgy

KW - Sodium chloride

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Titanium foams produced by solid-state replication of NaCl powders

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