Letter | Published:

Recrystallization of Zone-Refined Lead


THE decrease in recrystallization temperature with increasing purity of a metal is well known. This general phenomenon has been observed in the past few years especially in high-purity aluminium obtained by zone-refining; moreover, in France it has been demonstrated that recrystallization will occur at remarkably low temperatures. The work of Dimitrov and Albert1,2, is representative of the recent papers on this subject; they have shown that following 97 per cent deformation at low temperatures, the recrystallization of aluminium was complete after 200 hr. at −52° C., and at least initiated after 100 hr. at −79° C. These low-temperature investigations are significant because it seems that no current theory readily explains the processes involved. Then in conjunction with other experiments on zone-refined aluminium involving recrystallization and other phenomena, they show the marked effect of small amounts of impurity.

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    Dimitrov, O., and Albert, Ph., C. R. Acad. Sci., 245, 2275 (1957).

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    Dimitrov, O., and Albert, Ph., Rev. de Met., 56, 267 (1959).

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    Bolling, G. F., and Winegard, W. C., Acta Met., 6, 283, 288, (1958).

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    Aust, K. T., and Rutter, J. W., Trans A.I.M.E., 215, 119 (1959).

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    Bolling, G. F., Phil. Mag., 41, 537 (1959).

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    Beck, P. A., Adv. in Phys., 3, 245 (1954).

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    Neurath, P. W., and Koehler, J. S., J. App. Phys., 22, 621 (1951).

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    Boesono, Physica, 24, 71.

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