ISSN:
1573-8205
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Physics
Notes:
Conclusions Cathode bombardment of monocrystalline molybdenum surfaces oriented perpendicular to the [111] direction in a deuterium glow discharge plasma at a burning voltage of 500 V with a discharge current density of 4.5 mA/cm2 and a temperature of 800°C leads to formation in the surface layer of edge and nearly edge loops with Burgers vectors b=a/2 〈111〉 lying in the {111} and {321} planes and the Burgers vectors b=a 〈100〉 lying in the {100}, {115}, and {117} planes. All loops with diameters 〉100 Å were injection loops. It is proposed that the smaller defects that can be seen in an electron microscope are also aggregates of interstitial atoms. The formation of dislocation loops with Burgers vectorsb=a 〈100〉 has been explained in terms of the large compressive stresses which arise in the surface layer of the foil during bombardment. The production of a large number of highly mobile interstitial atoms in the surface layer of a single crystal by the deuterium plasma and their subsequent diffusion to sinks probably play a dominant role in radiation-enhanced self- and heterogeneous diffusion.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01142146
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