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$Al_{13}Fe_{4}$-Al Composites with Nanocrystalline Matrix Manufactured by Hot-Pressing of Milled Powders
| Content Provider | MDPI |
|---|---|
| Author | Krasnowski, Marek Gierlotka, Stanislaw Zasada, Dariusz |
| Copyright Year | 2022 |
| Description | The paper describes composites with the matrix containing a nanocrystalline intermetallic $Al_{13}Fe_{4}$ phase and microcrystalline aluminium. Mechanically alloyed $Al_{80}Fe_{20}$ powder, containing a metastable nanocrystalline $Al_{5}Fe_{2}$ phase, was mixed with 20, 30, and 40 vol.% of Al powder and consolidated at 750 °C under the pressure of 7.7 GPa. During the consolidation, the metastable $Al_{5}Fe_{2}$ phase transformed into a nanocrystalline $Al_{13}Fe_{4}$ phase. In the bulk samples, $Al_{13}Fe_{4}$ areas were wrapped around by networking Al regions. The hardness of the $Al_{13}Fe_{4}$-Al composites was in the range of 4.52–5.50 GPa. The compressive strength of the $Al_{13}Fe_{4}$-30%Al and $Al_{13}Fe_{4}$-40%Al composites was 805 and 812 MPa, respectively, and it was considerably higher than that of the $Al_{13}Fe_{4}$-20%Al composite (538 MPa), which failed in the elastic region. The $Al_{13}Fe_{4}$-30%Al and $Al_{13}Fe_{4}$-40%Al composites, in contrast, showed some plasticity: namely, 1.5% and 9.1%, respectively. The density of the produced composites is in the range of 3.27–3.48 $g/cm^{3}$ and decreases with the increase in the Al content. |
| Starting Page | 4241 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma15124241 |
| Journal | Materials |
| Issue Number | 12 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-15 |
| Access Restriction | Open |
| Subject Keyword | Materials Nuclear Energy and Engineering Metallic Composites Intermetallics Nanocrystalline Materials Mechanical Alloying Powder Compaction |
| Content Type | Text |
| Resource Type | Article |
