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Materials Science at Oregon State University

Metallic Glasses: Thermodynamics, Kinetics and Nano-scale Applications

Date: Thursday, May 12th
Presenter: Dr. Sundeep Mukherjee, Mechanical Engineering, Yale University

Abstract


Metallic glasses are interesting engineering materials because of their unique properties such as very high strength, perfectly elastic behavior, corrosion resistance, and soft magnetic properties. The extraordinarily high stability against crystallization of novel metallic glasses provides a large time/temperature window to process them similar to plastics. These materials can be cast in fully amorphous, near-net shapes with nano-scale precision. This is desirable in nano-imprint lithography, opto-electronics, and sensor technology. The combination of increased mechanical strength and potential absence of hydrogen gas evolution during degradation make certain glass-forming alloys interesting for biodegradable implant applications.
In this seminar, I will talk about the crystallization behavior, thermodynamics and kinetics for a number of novel metallic glass-forming alloys. The measured kinetic properties, viscosity and free volume, were found to have the most pronounced influence on glass-forming ability. I will discuss potential applications in nano-fabrication which utilize the unique thermo-physical properties of metallic glasses. Use of metallic-glass nano-structures as fuel cell catalysts and biomaterials will be discussed.

Biography:
Dr. Sundeep Mukherjee received his BS (1998) in Materials Engineering from Indian Institute of Technology, MS (2003) and PhD (2005) in Materials Science from California Institute of Technology. After his PhD, he worked as Senior Process Engineer in Logic Technology Development group of Intel Corporation for 6 years. At Intel, he was engaged in lithography process development of interconnect metals and vias. Since the beginning of 2011, he is working as a Postdoctoral Associate in the Department of Mechanical Engineering at Yale University. His research interests include novel applications of metallic glasses as fuel cell catalysts and biomaterial nano-structures.