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- Title
Characterization of Al Skeletal Structures Fabricated by Ultrasonic Powder Consolidation.
- Authors
Huang, Zhequn; Date, Kenji; Tatsugawa, Kiyoshi; Ando, Teiichi
- Abstract
Skeletal aluminum structures were fabricated by ultrasonic powder consolidation (UPC) of NaCl—15 mass pct Al and NaCl—20 mass pct Al composites at 723 K and 773 K (450 °C and 500 °C) for 4 seconds and subsequent leaching of the spacer NaCl from the composites by dissolution in water. Ultrasonically consolidated skeletal specimens withstood ultrasonic washing in water, whereas control specimens fabricated under identical conditions, but without ultrasonic vibration, were severely disintegrated. Scanning electron microscopy and mass analysis indicated full removal of NaCl from the UPC specimens. Scanning transmission electron microscopy confirmed full densification and metallurgical bonding in the cell walls of UPC specimens consolidated at 773 K (500 °C). The mechanisms of rapid densification and bonding in the Al cell walls were elucidated based on microstructural changes during UPC.
- Subjects
SKELETAL structures (Chemistry); ALUMINUM; POROUS metals; ULTRASONICS in metallurgy; MICROSTRUCTURE; POWDER metallurgy
- Publication
Metallurgical & Materials Transactions. Part A, 2018, Vol 49, Issue 12, p6173
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-018-4901-z