The growth of vacancy-type dislocation loops in zinc and magnesium during annealing has been studied as a function of small alloying additions and of the air pressure of the annealing environment. It is concluded that the excess vacancies necessary for loop growth are produced as metal atoms enter a thin oxide film on the surface and participate in the oxidation process. The results are discussed in terms of the current theories of oxidation.
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References
1.
BerghezanA., FourdeuxA., and AmelinckxS., Acta Met., 1961, 9, 464.
2.
HarrisJ. E. and MastersB. C., Proc. Roy. Soc., 1966, [A], 292, 240.
3.
DobsonP. S. and SmallmanR. E., ibid., 1966, [A], 293, 423.
4.
HalesR., SmallmanR. E., and DobsonP. S., to be published.
5.
PfeifferW., Physica Status Solidi, 1962, 2, 1727.
6.
PriceP. B., “Electron Microscopy and Strength of Crystals”, p. 103. 1963: New York and London (Interscience Pub-lishers).
7.
MitchellD. and OgilvieG. J., Physica Status Solidi, 1966, 15, 83.
8.
CrumpJ. C. and MitchellJ. W., Phil. Mag., 1963, 8, 59.
9.
DobsonP. S., GoodhewP. J., and SmallmanR. E., (ibid., 1967, 16, 9.
10.
GreenwoodG. W. and HarrisJ. E., Acta Met., 1965, 13, 936.
11.
NorrisD. I. R., ibid., 1966, 14, 291.
12.
HowesV. R., Nature, 1967, 216, 362.
13.
KubaschewskiO. and HopkinsB. E., “Oxidation of Metals and Alloys ”, 2nd edn.1962: London (Butterworths).
14.
GebhardtE., Z. Metallkunde, 1946, 37, 87.
15.
MitoffS. P., J. Chem. Physics, 1959, 31, 1261.
16.
MitoffS. P., ibid., 1962, 36, 1383.
17.
DobsonP. S., KritzingerS., and SmallmanR. E., Phil. Mag., 1968, 17, 769.
