Accession Number : ADD000034

Title :   Production of Vacancies in Metals by Laser Bombardment.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Metz,Stephen A ; Smith,Fred A , Jr

Report Date : 02 Oct 1973

Pagination or Media Count : 3

Abstract : In the patent lattice vacancies are induced in Ni and Va foils by bombardment of the foils with short, high-intensity laser pulses. Vacancy aggregates (voids or faulted loops) are then formed by annealing the bombarded foils at temperatures greater than about 0.3 T sub m (absolute melting point) where vacancies become mobile. Evaluation of metals used in the interior of nuclear reactors, e.g., for cladding the fuel elements, is now accomplished by inserting samples in the interior chamber of the reactor, operating the reactor, and then removing and examining the sample. A need exists for a speedy method of testing metals for ability to withstand the effects of neutron bombardment.

Descriptors :   *Radiation effects, *Test equipment, *Reactor fuels, *Patents, Lasers, Crystal defects, Crystal lattices, Nickel, Vanadium, Reactor fuels, Metals

Subject Categories : Metallurgy and Metallography
      Test Facilities, Equipment and Methods
      Fission Reactor Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE