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Nanoporous tungsten with tailorable microstructure and high thermal stability
- Source :
- International Journal of Refractory Metals and Hard Materials. 77:128-131
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Nanoporous tungsten was prepared by a strategy combining mechanical alloying and chemical dealloying at room temperature. The feature size of the nanoporous structure is adjustable by modifying dealloying medium and duration. The formation of nanoporous tungsten is dependent on the surface diffusion of W atoms and their diffusivity in the dealloying medium is in a magnitude order of 10ā20 m2 sā1. The structure of nanoporous tungsten has a high activation energy for surface diffusion, which contributes to its extremely high thermal stability. The nanoporous tungsten may be promising for applications at high temperatures.
- Subjects :
- Surface diffusion
Materials science
Nanoporous
chemistry.chemical_element
02 engineering and technology
Activation energy
Tungsten
010402 general chemistry
021001 nanoscience & nanotechnology
Thermal diffusivity
Microstructure
01 natural sciences
0104 chemical sciences
Chemical engineering
chemistry
Thermal stability
0210 nano-technology
Subjects
Details
- ISSN :
- 02634368
- Volume :
- 77
- Database :
- OpenAIRE
- Journal :
- International Journal of Refractory Metals and Hard Materials
- Accession number :
- edsair.doi...........1dbcd9eb4dabfb6b9401674fcb47cf9c