Microstructure and magnetic properties of spinodal Fe--Cr--Co alloys

Technical Report · Mon May 01 00:00:00 EDT 1978

DOI:https://doi.org/10.2172/6627188· OSTI ID:6627188

Okada, M

The relationship between the microstructure and magnetic properties of spinodally decomposed Fe--Cr--Co ductile permanent magnet alloys was investigated using transmission electron microscopy, electron diffraction, Lorentz microscopy, and magnetic analysis. Isothermal aging of three alloys (Fe-16 wt percent Cr-28 wt percent Co, Fe-31 wt percent Cr-23 wt percent Co, Cr-26 wt percent Fe-13 wt percent Co) resulted in decomposition into two phases, an Fe--Co rich phase (..cap alpha../sub 1/) and a Cr-rich phase (..cap alpha../sub 2/). The microstructural features of the decomposed products were consistent with those expected and agree with the asymmetry in shape of the reported miscibility gap in the Fe--Cr--Co system. An Fe-31 wt percent Cr-23 wt percent Co alloy was found to be best among the three alloys as a permanent magnet because of its combination of good ductility and good magnetic properties.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6627188
• Report Number(s): LBL-7668
• Resource Relation: Other Information: Thesis
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
MAGNETIC PROPERTIES
MICROSTRUCTURE
COBALT ALLOYS
IRON ALLOYS
AGING
DUCTILITY
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
ISOTHERMAL PROCESSES
MAGNETIC ANALYZERS
PERMANENT MAGNETS
PHASE DIAGRAMS
ALLOYS
BEAM ANALYZERS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIAGRAMS
DIFFRACTION
MAGNETS
MECHANICAL PROPERTIES
MICROSCOPY
PHYSICAL PROPERTIES
SCATTERING
TENSILE PROPERTIES
360104* - Metals & Alloys- Physical Properties
360102 - Metals & Alloys- Structure & Phase Studies