FIELD ION MICROSCOPY OF FILAMENTARY IRON CRYSTALS.
Abstract
Filamentary iron crystals of the C, D and H Series as furnished by Air Force Materials Laboratory were observed in several cross sections along the total length using the field ion microscope. No change in crystal orientation was noticed for (001), (111) and (110) oriented specimens. The previously discussed amorphous core structure was found to be caused by yield in the (111) region due to the field stress. Hydrogen promoted field evaporation is a means of shaping the tip surface at a reduced field strength so that artifacts can be avoided and perfect (111) planes can be developed. The few dislocations observed place no limit on the strength of the tip core which withstands a field stress of 710 kg/sq mm, or 4% of the bulk modulus. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1965
- Accession Number
- AD0472855
Entities
People
- Erwin W. Mueller
- Osamu Nishikawa
Organizations
- Pennsylvania State University