STUDENT SEMINAR
Speaker: Asutosh Behera
Topic: QUASICRYSTAL
Date & Time: Thursday, 5th August 2021 at 4:00 PM through MICROSOFT TEAMS
Seminar Link
Abstract:
A quasiperiodic crystal, or quasicrystal, is a structure that is ordered but not periodic. A quasicrystalline pattern can continuously fill all available space, but it lacks in translational symmetry, at the same time it shows inflation symmetry. Due to its unique crystalline structure quasicrystal shows various properties such as low frictional co-efficient, high thermal and electrical resistance, high hardness and brittleness, resistance to corrosion, which make them useful in various applications.
In my seminar, I will discuss about forbidden five fold symmetry in crystal and how this is achieved in quasicrystal, the inflation symmetry in quasicrystal and higher dimension periodic crystal. I will briefly discuss preparation methods of quasicrystal and stability of icosahedral quasicrystal on the basis of Hume-Rothery rule. Also I will discuss some of the important properties such as transport, tribological and chemical properties of quasicrystal and based on these properties I will show some of its application in various fields.
REFERENCES:
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- Lee, K.; Chen, E.; Naugle, D.; Liang, H. Corrosive Behavior of Multi-Phased Quasicrystal Alloys. J. Alloys Compd. 2021, 851 (156862)