Novel in –Situ heating transmission electron microscope holder for atomic resolution

  • Khaled Bataineh Department of Mechanical Engineering, Jordan University of Science and Technology, Irbid- Jordan
Keywords: In- situ TEM instrumentation, Heating holder, finite element analysis, atomic resolution.

Abstract

This study presents novel design of “in-situ” TEM heating holder.  In-situ experimentations are important because hot deformation, dynamic recovery and dynamic recrystallization are important processes which are not well understood because it is very difficult to assess the nature microstructural processes solely from the traditional post mortem study of samples.  We have designed an optimum heating holder that is dynamically stable for accuracy and image processes, capable of elevating the sample temperature up to 2000 K, with minimum controllable drift of the sample position.  Sample drift is calculated. Thermal stressed induces in the sample are calculated. The in-depth finite element simulations provide detailed information about thermal and dynamic behavior of the heating holder. Finite element results show that the proposed design outperform the current heating technology. Based on the finite element results, a revised design is proposed that has lower temperature gradient among the sample, lower temperature difference between the sample and the TEM grids, lower thermal stresses in the sample, lower heat losses to the microscope parts. Furthermore, the present analysis provides the basis for the design of optimal heating holder for accurate measurements.

DOI: http://dx.doi.org/10.5755/j01.mech.23.2.13544

Author Biography

Khaled Bataineh, Department of Mechanical Engineering, Jordan University of Science and Technology, Irbid- Jordan
Dr. Khaled Bataineh has combined academic, research, and industrial experiences. He is currently working as associate Professor of Mechanical Engineering. He received a B.S. from Jordan University of Science and Technology in 1999, and an M.S. from Carnegie Mellon. He received his Ph.D. in Mechanical Engineering from the University of Pittsburgh in 2005. Dr. Bataineh’s research interests are in micro scale fluidic system, machine design, and renewable energy technology. He is well –known in modeling of complex flows. His current group’s research focuses on microfluidics, including micropump and micro cone -plate viscometer. The tools used to study such systems are theoretical, numerical and experimental. Furthermore, his research focuses on utilizing solar energy either directly or by converting it to electrical energy. Currently, he is focusing on Concentrated Solar Power (CSP) which is a promising renewable energy technology for the Mediterranean and gulf countries (world’s Sun Belt region).  He is the author of about 32 reviewed journal articles and other technical publications.
Published
2017-05-03
Section
DESIGN AND OPTIMIZATION OF MECHANICAL SYSTEMS