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Order-disorder phase transition in Ni4W alloy

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Abstract

The order-disorder phase transition in Ni4W alloy with a D1 a superlattice was studied experimentally by x-ray structural analysis and theoretically by the Green function method. An experimental temperature dependence was obtained for the equilibrium parameter of long-range order for Ni4W alloy. It was established that the order-disorder phase transition in the alloy is a first-order transition; the transition occurs through the two-phase region D1a + A1. The Green function technique, with account for the pair-correlation functions, was used to describe the order-disorder transition for the D1 a superlattice. The theoretical temperature dependence obtained for the equilibrium parameter of long-range order is in satisfactory agreement with the experimental curve.

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Authors and Affiliations

  1. Tomsk Civil Engineering Institute, USSR

    É. V. Kozlov, V. M. Kushnarenko & D. M. Shtern

Authors
  1. É. V. Kozlov
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  2. V. M. Kushnarenko
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  3. D. M. Shtern
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Additional information

Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 92–97, April, 1978.

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Kozlov, É.V., Kushnarenko, V.M. & Shtern, D.M. Order-disorder phase transition in Ni4W alloy. Soviet Physics Journal 21, 485–490 (1978). https://doi.org/10.1007/BF00895552

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  • DOI: https://doi.org/10.1007/BF00895552

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