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Preparation of bulk metallic glasses by modifying local structure of icosahedral quasicrystals
- Source :
- Intermetallics. 109:97-104
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- An attempt is carried out to design metallic glasses by modifying the local structure of icosahedral quasicrystals. A series of metallic glasses are prepared by introducing beryllium to the quasicrystal former, Zr40Ti40Ni20, and the maximum diameter of the glasses reaches 20 mm. A phase transformation diagram is constructed for the alloys of (Zr40Ti40Ni20)100-xBex, revealing the transition from stable crystal to quasicrystal and then to metallic glasses with the increased Be content. This study shows a connection between the formation of metallic glasses and the specific thermodynamics of the initially precipitated quasicrystals. Interestingly, both improvements in the forming ability for glasses and quasicrystals are observed over a wide composition range. Ab initio molecular dynamic simulations show the evolution of the structural features of the metallic melts for the optimised glass forming region, which guarantee the primary precipitation of quasicrystal.
- Subjects :
- 010302 applied physics
Amorphous metal
Materials science
Condensed matter physics
Precipitation (chemistry)
Icosahedral symmetry
Mechanical Engineering
Metals and Alloys
Ab initio
Quasicrystal
02 engineering and technology
General Chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Metal
Crystal
Mechanics of Materials
visual_art
Phase (matter)
0103 physical sciences
Materials Chemistry
visual_art.visual_art_medium
0210 nano-technology
Subjects
Details
- ISSN :
- 09669795
- Volume :
- 109
- Database :
- OpenAIRE
- Journal :
- Intermetallics
- Accession number :
- edsair.doi...........f1faa7bbd2e69cabefa77a1fb47ac455