[eta] to G phase transformation in electrodeposited iron-zinc alloy coatings
- Sandia National Labs., Albuquerque, NM (United States)
- Univ. of Massachusetts, Amherst, MA (United States)
- Lehigh Univ., Bethlehem, PA (United States). Materials Science and Engineering Dept.
The [eta] to G phase transformation in electrodeposited iron-zinc alloy coatings is a rapid diffusional phase transformation occurring in the nanometer-scale microstructure of the coatings. Iron-supersaturated zinc, or [eta] phase, undergoes a decomposition process to an iron-deficient [Gamma]-like, or G, phase at temperatures near 150 C. The phase transformation is preceded by a polygonization process, driven by strain energy and/or supersaturation in the material. The G phase nucleates on boundaries within the [eta] phase and grows into 30 to 80-nm equiaxed grains. The activation energy for the transformation varies with iron content, which may indicate that solute effects influence boundary diffusion of zinc.
- OSTI ID:
- 7175473
- Journal Information:
- Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Vol. 25:6; ISSN 0360-2133
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRODEPOSITED COATINGS
CRYSTAL-PHASE TRANSFORMATIONS
IRON ALLOYS
STEELS
CORROSION PROTECTION
ZINC ALLOYS
EXPERIMENTAL DATA
MICROSTRUCTURE
ALLOYS
COATINGS
DATA
INFORMATION
IRON BASE ALLOYS
NUMERICAL DATA
PHASE TRANSFORMATIONS
360102* - Metals & Alloys- Structure & Phase Studies
360105 - Metals & Alloys- Corrosion & Erosion