Open-cell tungsten nanofoams: Chloride ion induced structure modification and mechanical behavior
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In: Results in Physics, Vol. 17.2020, No. June, 103062, 01.06.2020.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Open-cell tungsten nanofoams
T2 - Chloride ion induced structure modification and mechanical behavior
AU - Zhao, Mingyue
AU - Pfeifenberger, Manuel J.
AU - Kiener, Daniel
PY - 2020/6/1
Y1 - 2020/6/1
N2 - In this work, a nanoporous structure composed entirely of tungsten ligaments was synthesized by selective phase dissolution of a nanocrystalline tungsten-copper composite in ferric chloride aqueous solution at room temperature. Observation of the tungsten nanoligament modifications in both ferric chloride and hydrochloric acid solution illustrated that the chloride ions accelerate the surface diffusivity of tungsten atoms by two orders of magnitude, thus causing an evolution of the tungsten nanoligaments upon reconstruction and growth with the increase of dissolution time. Using nanoindentation and Vickers’ microhardness measurements, we discovered that the created tungsten foam deforms via a fast densification in combination with the formation of cracks due to a low ligament strength.
AB - In this work, a nanoporous structure composed entirely of tungsten ligaments was synthesized by selective phase dissolution of a nanocrystalline tungsten-copper composite in ferric chloride aqueous solution at room temperature. Observation of the tungsten nanoligament modifications in both ferric chloride and hydrochloric acid solution illustrated that the chloride ions accelerate the surface diffusivity of tungsten atoms by two orders of magnitude, thus causing an evolution of the tungsten nanoligaments upon reconstruction and growth with the increase of dissolution time. Using nanoindentation and Vickers’ microhardness measurements, we discovered that the created tungsten foam deforms via a fast densification in combination with the formation of cracks due to a low ligament strength.
KW - Diffusion
KW - Indentation
KW - Microstructure
KW - Porous materials
KW - Tungsten
UR - http://www.scopus.com/inward/record.url?scp=85082792986&partnerID=8YFLogxK
U2 - 10.1016/j.rinp.2020.103062
DO - 10.1016/j.rinp.2020.103062
M3 - Article
AN - SCOPUS:85082792986
VL - 17.2020
JO - Results in Physics
JF - Results in Physics
SN - 2211-3797
IS - June
M1 - 103062
ER -
