Abstract
In this study, gas atomized Al-Cr-Fe powders were consolidated using spark plasma sintering (SPS). Hypotheses about the densification mechanism were proposed and effects of the electric field were investigated. The densification is initially controlled by particle rearrangement and then by dislocation motion. The comparison of X-ray diffraction patterns of the SPSed sample and the sample annealed in the vacuum oven shows that SPS process generates a higher amount of decagonal Al-Cr-Fe. It is proposed that such effect can be attributed to the decrease in the activation energy for forming the critical nuclei in the electric field.
| Original language | English |
|---|---|
| Pages (from-to) | 88-92 |
| Number of pages | 5 |
| Journal | Scripta Materialia |
| Volume | 114 |
| DOIs | |
| Publication status | Published - Mar 15 2016 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2015 Elsevier B.V. All rights reserved.
ASJC Scopus Subject Areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
Keywords
- Electric field
- Powder consolidation
- Quasicrystal
- Spark plasma sintering
- X-ray diffraction