Date of Award

Spring 1966

Document Type

Thesis - Restricted

Degree Name

Master of Science (MS)


Mechanical Engineering

First Advisor

Hirthe, Walter M.

Second Advisor

Wackman, Peter H.

Third Advisor

Jansen, Richard J.


Thin sections of rutile have been produced for transmission electron microscopy using ionic bombardment as the last stage or the thinning process. The surface of the specimens were (100), (110), and (001) planes. The orientations are substantiated by selected area diffraction patterns. The optimum operating conditions of the ion gun were found to be 3000 volt accelerating potential for argon ions at a pressure of 50 micron Hg and electrode spacing or 15.4 cm. No noticeable damage was done to the specimen by the impact ions. A preliminary investigation shoved that the imperfection structure differs from that observed in epitaxially grown flakes. Large dislocation networks are present and extensive stacking faults were seldom observed, leading to the conclusion that they are either extremely narrow or are not energetically favored. The bombardment process is not dependent upon the crystallographic orientations or the specimens which were examined. It is believed that this process could be utilized in the preparation of other ceramic materials for transmission electron microscopy.



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