Some applications of thermomagnetometry to the study of chromindur alloys |
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Authors: | P.K. Gallagher E. Coleman S. Jin R.C. Sherwood |
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Affiliation: | Bell Laboratories, Murray Hill, NJ 07974 U.S.A. |
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Abstract: | Thermomagnetic experiments are shown to be a useful and rapid technique for studying phase changes involving magnetic materials. Particular examples are chosen from Chromindur II (Fe28Cr10.5Co) alloys having different thermal histories. The Curie temperature of the single phase alloy is found to be ~650°C and the metastable spinodal decomposition boundary is at essentially the same temperature. The Cr-rich near equilibrium decomposition product is less magnetic and has a lower Tc, while the Cr-deficient product is more magnetic, with a Tc ? 720°C.Comparisons are made at different heating and cooling rates between temperatures measured using magnetic standards and those measured by a thermocouple in close proximity to the sample. |
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