BONDING AND CHEMICAL COMBINATION STUDIES USING THE ELECTRON MICROBEAM PROBE.
Technical rept. Oct 69-Feb 70,
DAYTON UNIV OHIO RESEARCH INST
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The changes in x-ray emission spectra due to chemical combination may be used effectively with the electron microbeam probe to quickly identify compounds and alloy phases. To lessen the tedium of measuring small spectral changes and to improve precision, step scanning, and automatic data acquisition and handling techniques are used. Such a system is described and computer plotted spectra from hypervelocity impact specimens, oxidation specimens, and thin films are shown. Difficulties and limitations of the technique are discussed, such as carbon contamination and the changes in some spectra due to electron beam penetration changes which influence self-absorption. The self-absorption phenomenon may be taken advantage of, however, and it is shown that the computer can prepare self-absorption plots which closely approximate true absorption spectra. Author
- Test Facilities, Equipment and Methods