Stereoscopic methods in TEM

Conference · Tue Jul 01 04:00:00 EDT 1975

DOI:https://doi.org/10.1017/S0424820100115092· OSTI ID:7363562

Thomas, L. E.

Stereoscopic methods used in TEM are reviewed. The use of stereoscopy to characterize three-dimensional structures observed by TEM has become widespread since the introduction of instruments operating at 1 MV. In its emphasis on whole structures and thick specimens this approach differs significantly from conventional methods of microstructural analysis based on three-dimensional image reconstruction from a number of thin-section views. The great advantage of stereo derives from the ability to directly perceive and measure structures in three-dimensions by capitalizing on the unsurpassed human ability for stereoscopic matching of corresponding details on picture pairs showing the same features from different viewpoints. At this time, stereo methods are aimed mainly at structural understanding at the level of dislocations, precipitates, and irradiation-induced point-defect clusters in crystal and on the cellular irradiation-induced point-defect clusters in crystal and on the cellular level of biological specimens. 3-d reconstruction methods have concentrated on the molecular level where image resolution requirements dictate the use of very thin specimens. One recent application of three-dimensional coordinate measurements is a system developed for analyzing depth variations in the numbers, sizes and total volumes of voids produced near the surfaces of metal specimens during energetic ion bombardment. This system was used to correlate the void volumes at each depth along the ion range with the number of atomic displacements produced at that depth, thereby unfolding the entire swelling versus dose relationship from a single stereo view. A later version of this system incorporating computer-controlled stereo display capabilities is now being built.

• Research Organization: Hanford Engineering Development Lab., Richland, Wash. (USA)
• DOE Contract Number: AT(45-1)-2170
• OSTI ID: 7363562
• Report Number(s): HEDL-SA-1001; CONF-750825-6
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400100 -- Analytical & Separations Chemistry
ALLOYS
BEAMS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
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CHROMIUM STEELS
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COMPUTER CODES
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CRYSTAL STRUCTURE
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ELECTRON MICROSCOPY
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HEAT RESISTING ALLOYS
HEMATITE
ION BEAMS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
IRON ORES
IRON OXIDES
MICROSCOPY
MINERALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NIOBIUM CARBIDES
NIOBIUM COMPOUNDS
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OXIDES
OXYGEN COMPOUNDS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
REVIEWS
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TRANSITION ELEMENT COMPOUNDS
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