Rapid Construction of Fe-Co-Ni Composition-Phase Map by Combinatorial Materials Chip Approach

ACS Comb Sci. 2018 Mar 12;20(3):127-131. doi: 10.1021/acscombsci.7b00171. Epub 2018 Feb 6.

Abstract

One hundred nanometer thick Fe-Co-Ni material chips were prepared and isothermally annealed at 500, 600, and 700 °C, respectively. Pixel-by-pixel composition and structural mapping was performed by microbeam X-ray at synchrotron light source. Diffraction images were recorded at a rate of 1 pattern/s. The XRD patterns were automatically processed, phase-identified, and categorized by hierarchical clustering algorithm to construct the composition-phase map. The resulting maps are consistent with corresponding isothermal sections reported in the ASM Alloy Phase Diagram Database, verifying the effectiveness of the present approach in phase diagram construction.

Keywords: Fe−Co−Ni; X-ray diffraction; combinatorial materials chip; hierarchical clustering; phase diagram.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Algorithms
  • Alloys / chemistry*
  • Cluster Analysis
  • Cobalt / chemistry*
  • Combinatorial Chemistry Techniques / methods*
  • Iron / chemistry*
  • Molecular Structure
  • Nanostructures / chemistry
  • Nickel / chemistry*
  • Phase Transition
  • Structure-Activity Relationship
  • X-Ray Diffraction / methods

Substances

  • Alloys
  • Cobalt
  • Nickel
  • Iron