Date of Award
Spring 1966
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Mechanical Engineering
First Advisor
Hirthe, Walter M.
Second Advisor
Wackman, Peter H.
Third Advisor
Jansen, Richard J.
Abstract
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.
Recommended Citation
Melville, Andreas T., "Transmission Electron Microscopic Observation of the Imperfection Structure of As-Grown Rutile Single Crystals Thinned by Ionic Bombardment" (1966). Master's Theses (1922-2009) Access restricted to Marquette Campus. 4721.
https://epublications.marquette.edu/theses/4721