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Rapid Construction of Fe-Co-Ni Composition-Phase Map by Combinatorial Materials Chip Approach
Hui Xing1,2, Bingbing Zhao1,2, Yujie Wang1,3
1Materials Genome Initiative Center , Shanghai Jiao Tong University , Shanghai 200240 , China.
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.
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