Source: https://mfint.imp.kiev.ua/en/abstract/v40/i09/1231.html
Timestamp: 2019-04-25 15:42:16+00:00

Document:
The formation of homogeneous highly supersaturated (up to 23 at.% Be and 31.4 at.% Be in a Co–Be alloy and a Cu–Be alloy, respectively) solid solutions having the same composition as the initial liquid ($C_0$) is revealed in the Co–Be and Cu–Be alloys by the method of quenching from the liquid state (QLS). At the maximum cooling rates (10$^7$ K/s) sufficient to form an amorphous solid state, it is not possible to prevent ordering processes in the congruent equiatomic phase of CsCl-type Co–Be. At the same time, for a Cu–Be alloy, it is shown that, under the QLS conditions, a hybrid interstitial–substitutional-type solid solution can be formed. As experimentally confirmed, under the QLS conditions, a significant supercooling of the melt below the decomposition temperature of the phases of the eutectoid composition, namely, $\beta_1$ and $\beta$ in the Co–Be and Cu–Be alloys, respectively, is took place. The positive role of the QLS method in increasing of the level of the mechanical and hard-magnetic characteristics in rapid-quenched films is shown.
Key words: splat-quenching, peritectic and eutectoid reactions, equiatomic phase, magnetic characteristics, highly supersaturated solid solution.
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