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On the in situ synthesis of (Fe,Cr)Al and (Fe,Cr)Al–Al2O3 nanostructured materials
| Content Provider | Scilit |
|---|---|
| Author | Sourani, Fereshteh Enayati, Mohammad Hossein Ngan, Alfonso H. W. |
| Copyright Year | 2019 |
| Description | Journal: Materials Research Express In the present work, FeAl, (Fe,Cr)Al and (Fe,Cr)Al-Al2O3 intermetallic compounds were synthesized by mechanical alloying (MA), in which the intermetallic compounds were formed in one step at room temperature, and the resultant nanocrystalline structure led to significant improvements of strength and ductility. Specifically, MA of an Fe50Al50 powder mixture led to the formation of the FeAl compound in 30 hours with a grain size of about 80 nm. Increasing milling time to 100 hours decreased the grain size to about 50 nm. In the next step, an Fe40Cr10Al50 power mixture was converted into a solid solution and then an intermetallic compound with a grain size of about 30 nm after 100 hours of MA. Finally, the synthesis of nanocomposites with (Fe,Cr)Al intermetallic compound containing Al2O3 as the reinforced phase was investigated. For this purpose, two different methods, namely the reduction of chromium oxide (Cr2O3) and that of hematite (Fe2O3), were examined. In the first method, a mixture of Fe-Al-Cr2O3 powder aluminum was milled and alumina phase was formed, but after 100 hours of MA, the Cr2O3 phase was still observed. In the second method, a Cr-Al-Fe2O3 mixture was milled, and the heat of reaction immediately resulted in the formation of (Fe,Cr)Al nanoparticles with a grain size of about 29 nm, along with Al2O3 crystalline particles. The results of nanoindentation tests on these particles revealed that their hardness increases by chromium addition as well as Al2O3 reinforcing nanoparticles |
| Related Links | https://iopscience.iop.org/article/10.1088/2053-1591/ab24f5/pdf |
| ISSN | 20531591 |
| e-ISSN | 20531591 |
| DOI | 10.1088/2053-1591/ab24f5 |
| Journal | Materials Research Express |
| Issue Number | 8 |
| Volume Number | 6 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2019-05-28 |
| Access Restriction | Open |
| Subject Keyword | Journal: Materials Research Express Intermetallic Compounds |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Metals and Alloys Biomaterials Electronic, Optical and Magnetic Materials Polymers and Plastics |
