Abstract
Gas-atomised powders of Al-Fe-(V, Si) alloys exhibited microstructures consisting of cells and/or some forms of icosahedral phase. The forms of icosahedral phase include irregular shaped aggregates of ultrafine spherical micro-quasicrystalline (MI) particles in α-aluminium phase matrix, ultrafine MI particles in intercellular regions, and globular clusters of randomly oriented MI particles (in medium to coarse size Al- Fe-V alloy powders) or globular particles of single icosahedral phase (in medium to coarse size Al-Fe-V-Si alloy powders). It has been proposed that solidification behavior of the Al-Fe-(V, Si) alloy powders would be attributed to a competition between growth of α-aluminium phase fronts and freely nucleated icosahedral particles. Interactions between the solidification fronts and dispersed particles, influenced by solidification rates, would control microstructural morphology.
Original language | English |
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Pages (from-to) | 33-41 |
Number of pages | 9 |
Journal | ScienceAsia |
Volume | 30 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2004 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2004 Science Society of Thailand under Royal Patronage. All rights reserved.
Keywords
- gas-atomised powders. Al-Fe-(V
- microstructure
- Si) alloys.
- solidification
ASJC Scopus subject areas
- General