Abstract
The thermal stability and structure of binary amorphous Zr100 − x Be x alloys have been studied using differential scanning calorimetry and neutron diffraction over a wide concentration range (30 ≤ x ≤ 65). The amorphous alloys have been prepared by rapid quenching from melt. The studied amorphous system involves the composition range around the eutectic composition with boundary phases α-Zr and ZrBe2. It has been found that the crystallization of alloys with low beryllium contents (“hypoeutectic” alloys with x ≤ 40) proceeds in two stages. Neutron diffraction has demonstrated that, at the first stage, α-Zr crystallizes and the remaining amorphous phase is enriched to the eutectic composition; at the second stage, the alloy crystallizes in the α-Zr and ZrBe2 phases. At higher beryllium contents (“hypereutectic” alloys), one phase transition of the amorphous phase to a mixture of the α-Zr and ZrBe2 phases has been observed. The concentration dependences of the crystallization temperature and activation energy have been revealed.
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Original Russian Text © E.A. Golovkova, A.V. Surkov, G.F. Syrykh, 2015, published in Fizika Tverdogo Tela, 2015, Vol. 57, No. 2, pp. 254–257.
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Golovkova, E.A., Surkov, A.V. & Syrykh, G.F. Crystallization of amorphous Zr-Be alloys. Phys. Solid State 57, 266–269 (2015). https://doi.org/10.1134/S1063783415020122
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DOI: https://doi.org/10.1134/S1063783415020122