On the possibility of increasing lifetime of a neutron generator target through laser-induced nanorelief generation at the film – substrate interfaceстатья
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Дата последнего поиска статьи во внешних источниках: 5 декабря 2014 г.
Аннотация:The evolution of an ensemble of point defects (vacancies
and interstitials) produced by irradiating a tritium-saturated titanium
target (sorbent film on substrate) with deuterium is considered.
It is shown that when the concentration of defects exceeds a
certain critical value, the film undergoes transition into a quasiperiodic
bent state with simultaneous clustering of defect aggregates
at the relief extrema, spontaneously created at the film – substrate
interface and at the film free surface. The aggregation of
vacancies leads to the formation of pores. The subsequent deadherence
or rapture of the film in the regions of large pores at the
film – substrate interface leads to irreversible degradation of the
target. We discuss the possibility of suppressing this effect by nanostructuring
a laser-induced nanorelief at the substrate surface
before the sorbent film deposition. Different types of such a relief
are experimentally demonstrated