Bulk amorphous and nanocrystalline Al60Fe20Ti20 and Al65Fe18Ti12Ni5 alloys
| Autor: | M. Krasnowski |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Alloy 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Nanocrystalline material 0104 chemical sciences law.invention Amorphous solid Mechanics of Materials law Phase (matter) engineering General Materials Science Crystallization 0210 nano-technology |
| Zdroj: | Materials Letters. 239:113-115 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2018.12.090 |
| Popis: | Amorphous Al60Fe20Ti20 and Al65Fe18Ti12Ni5 alloys were produced by mechanical alloying. Thermal behaviour examinations revealed that the crystallisation onset temperatures are 557 °C and 539 °C for the Al60Fe20Ti20 and the Al65Fe18Ti12Ni5 alloy respectively. The crystallisation products were nanocrystalline τ2-type phases. The mechanically alloyed powders were consolidated at temperatures ensuring maintaining amorphous structure and at 1000 °C. After consolidation at 1000 °C the samples consisted of nanocrystalline τ2-type phases and Al5Fe2 phase. The hardness of the amorphous and nanocrystalline Al60Fe20Ti20 alloy is 8.04 GPa and 9.37 GPa respectively, whereas that of the amorphous and nanocrystalline Al65Fe18Ti12Ni5 alloy is 7.69 GPa and 8.79 GPa respectively. The density of the amorphous and nanocrystalline Al60Fe20Ti20 alloy is 4.113 g/cm3 and 4.20 g/cm3 respectively, while that of the amorphous and nanocrystalline Al65Fe18Ti12Ni5 alloy is 4.111 g/cm3 and 4.278 g/cm3 respectively. The hardness of the produced low-density materials is relatively high. To the best of our knowledge, such materials were produced for the first time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect