Accession Number:

ADA058027

Title:

Microstructural Observations on High Strength Polycrystalline Iron Whiskers.

Descriptive Note:

Technical rept.,

Corporate Author:

VIRGINIA UNIV CHARLOTTESVILLE DEPT OF MATERIALS SCIENCE

Report Date:

1978-08-01

Pagination or Media Count:

18.0

Abstract:

Polycrystalline iron whiskers produced by chemical vapor decomposition in the presence of a magnetic field have been investigated in regard to their microstructure and composition by transmission electron microscopy, field ion microscopy, and by X-ray and electron diffraction techniques. It was found that the whiskers consisted of a unique and complex microdispersion of iron oxides, iron carbide, and atomic carbon which bond the very small alpha-iron crystallites into a non-porous microstructure of high integrity. The mixing of strong covalent bonding with metallic bonding is proposed to explain the exceptionally high tensile strength of the whiskers. Author

Subject Categories:

  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE