In situ transmission electron microscopy and ion irradiation of ferritic materials.
The intermediate voltage electron microscope-tandem user facility in the Electron Microscopy Center at Argonne National Laboratory is described. The primary purpose of this facility is electron microscopy with in situ ion irradiation at controlled sample temperatures. To illustrate its capabilities and advantages a few results of two outside user projects are presented. The motion of dislocation loops formed during ion irradiation is illustrated in video data that reveals a striking reduction of motion in Fe-8%Cr over that in pure Fe. The development of extended defect structure is then shown to depend on this motion and the influence of nearby surfaces in the transmission electron microscopy thin samples. In a second project, the damage microstructure is followed to high dose (200 dpa) in an oxide dispersion strengthened ferritic alloy at 500 degrees C, and found to be qualitatively similar to that observed in the same alloy neutron irradiated at 420 degrees C.
Kirk
Marquis A
MA
Electron Microscopy Center, Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA. kirk@anl.gov
Baldo
Peter M
PM
Liu
Amelia C Y
AC
Ryan
Edward A
EA
Birtcher
Robert C
RC
Yao
Zhongwen
Z
Xu
Sen
S
Jenkins
Michael L
ML
Hernandez-Mayoral
Mercedes
M
Kaoumi
Djamel
D
Motta
Arthur T
AT
D000497:Alloys / Q000737:chemistry / Q000528:radiation effects; D005290:Ferric Compounds / Q000737:chemistry / Q000528:radiation effects*; D046529:Microscopy, Electron, Transmission / Q000295:instrumentation; D049329:Nanostructures / Q000737:chemistry / Q000528:radiation effects / Q000648:ultrastructure; D013499:Surface Properties; D013696:Temperature
D000497:Alloys; D005290:Ferric Compounds; C001215:ferrite