Research > Faculty Projects
Development of a MEMS-based Ultra-high Temperature Heating Element for the TEM
Principal Investigator
Karl F. Bohringer
Sponsor(s)
Washington Technology Center (WTC)
Award Period
07/01/2007 - 04/01/2008
Abstract
Dynamic electron microscopy experiments allow direct
correlations to be made between materials processing
conditions, microstructure, properties and performance.
This approach not only permits deeper understanding of the
basic physical processes involved, but also allows rapid
exploration of a matrix of conditions and effects. Perhaps
the most common dynamic microscopy experiments revolve
around the relatively simple act of heating a sample, as
temperature is often the primary thermodynamic driving
force for microstructural change in materials processing.
However, the current state of the art in heating and
cooling holder design relies on substantially out-dated
technologies, yielding significant problems with respect to
overall temperature range, drift/stability issues,
expensive and time consuming maintenance and lack of
precise and simple temperature control. In this proposal,
our goal is to develop precision control of specimen
temperature (to an accuracy of 10oC in the range 5-2000K)
in response to the need for dramatically improved
instrumentation in this area. This is in fact an ambitious
goal, requiring substantial changes in methodology,
materials selection and thermal design. Continuing progress
from Phase I, the Phase II proposal will expand to address
advanced methods of highly accurate temperature sensing in-
situ at ultra-high temperatures (2000K) for the TEM.
Updates or corrections to this page should be sent to gheaton@u.washington.edu.
