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Full Record for Micrograph 628
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- Micrograph no
- 628
- Brief description
- Sintered salt (NaCl)
- Keywords
- aluminium foam, ceramic
, NaCl, preform, salt, sintering - Categories
- Ceramic
- System
- Na-Cl
- Composition
- Not specified
- Standard codes
- Reaction
- Processing
- The salt has been compacted (20MPa) and sintered for four hours at 785 degrees C
- Applications
- A sintered preform of salt can be used as a preform in the investment casting of open celled metal foams. The preform can then be washed out.
- Sample preparation
- The sample has been sputter-coated with gold
- Technique
- Scanning electron microscopy (SEM)
- Length bar
- 140 μm
- Further information
- The interconnectivity of pores in the reticulated aluminium foam was found to be strongly dependent on the degree of sintering of the salt. The sintering occurs by a non-densifying mechanism but the necks grow progressively wider with time. Four hours provides sufficient interconnectivity for the salt to be readily washed-out.
- Contributor
- J A Curran
- Organisation
- Department of Materials Science and Metallurgy, University of Cambridge
- Date
- 03/10/02
- Licence for re-use
Attribution-NonCommercial-ShareAlike 4.0 International