Abstract
Kraft and Flinn's [2] powder X-ray diffraction data obtained from excess-phase particles in Fe + 18.5 wt % Ni + 20 wt % Cr + B alloys have been analyzed. The major boride phase was determined to be (Cr,Fe)2B (orthorhombic, Fddd, isomorphous with Cr2B). Its lattice parameters, a = 1.4585 ± 0.0010 nm, b = 0.7331 ± 0.0005 nm, c = 0.4223 ± 0.0003 nm, are indicative of the composition (Cr1.04 ± 0.08Fe0.96 ± 0.08)B. It was not possible to identify the phase(s) giving rise to a much weaker set of diffraction lines in the patterns. Of the two alloys used by Kraft and Flinn as standards, the one intended to be Cr2B was found to be a mixture of Cr2B and Cr5B3. The second, intended to be Cr1.0Fe1.0B was determined to be Cr0.67 ± 0.07Fe1.33 ± 0.07B.
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Kayser, F.X., Kayser, G.F. A re-examination of the Kraft and Flinn diffraction data for Cr2B, (Cr,Fe)2B, and the boride phase in Fe + 18.5 wt % Ni + 20 wt % Cr + B alloys. Journal of Materials Science 34, 1271–1275 (1999). https://doi.org/10.1023/A:1004581511232
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DOI: https://doi.org/10.1023/A:1004581511232