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Cover Picture: The Role of Oxidation During Compaction on the Expansion and Stability of Al Foams Made Via a PM Route (Adv. Eng. Mater. 6/2006)
Author(s) -
Asavavisithchai S.,
Kennedy A. R.
Publication year - 2006
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200690011
Subject(s) - materials science , compaction , cover (algebra) , hydride , expansion ratio , composite material , volume expansion , metallurgy , chemical engineering , metal , mechanical engineering , medicine , engineering
The foam expansion and collapse behaviour for hot compacted Al‐TiH 2 precursors has been shown to be driven by the oxidation of the Al powder and the premature loss of gas from the TiH 2 foaming agent during the compaction process. At 550 °C, oxidation is rapid, and gas loss from the hydride is extensive leading to poor expansion.