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The origin of the effect of aging on the thermoelectric power of maraging C250 steel

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Abstract

The sensitivity of thermoelectric power (TEP) to the aging condition of maraging C250 steel was investigated. TEP revealed a high sensitivity to the aging process as its value decreased by ~17 μV/K following 3 h of aging at 510 °C. This is a noticeably large change for metallic systems undergoing metallurgical modifications. Using model alloys, we show that the significant change in TEP is mainly due to the depletion of the matrix from the precipitating elements which change the electron density in the Fermi level, as was confirmed by X-ray photoelectron spectroscopy.

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Notes

  1. Provided that the electron scattering is elastic, the density of electronic states is reasonably smooth, and phonon drag is negligible.

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Acknowledgements

This study was supported by the joint IAEC-UPBC Pazy foundation, Grant No. 151. The authors express their gratitude to Mr. S. Levi, Mr. Y. Alon, Mr. M. Amos, Mr. O. Omasi, and Mr. Z. Foxman for their technical assistance.

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Authors and Affiliations

  1. Nuclear Research Center-Negev, P.O. Box 9001, 84100, Beer-Sheva, Israel

    M. Pinkas & M. Shmuelevitsh

  2. Department of Materials Engineering, Ben Gurion University of the Negev, P.O. Box 653, Beer-Sheva, Israel

    O. Moshka, S. Okavi, Y. Gelbstein, N. Froumin & L. Meshi

  3. Ilse Katz Institute for Nanoscale Science & Technology, Ben Gurion University of the Negev, P.O. Box 653, Beer-Sheva, Israel

    N. Froumin & L. Meshi

Authors
  1. M. Pinkas
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  2. O. Moshka
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  3. S. Okavi
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  4. M. Shmuelevitsh
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  5. Y. Gelbstein
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  6. N. Froumin
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  7. L. Meshi
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Correspondence to M. Pinkas.

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Pinkas, M., Moshka, O., Okavi, S. et al. The origin of the effect of aging on the thermoelectric power of maraging C250 steel. J Mater Sci 50, 7698–7704 (2015). https://doi.org/10.1007/s10853-015-9336-y

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  • DOI: https://doi.org/10.1007/s10853-015-9336-y

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