Accession Number:

AD0679534

Title:

RADIATION AND DEFORMATION DEFECTS IN CRYSTALS,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1968-03-29

Pagination or Media Count:

14.0

Abstract:

The effect of x-ray or neutron irradiation and of plastic deformation on the structure of ionic crystals LiF, NaCl, KCl, AgCl and of metal crystals Al, Zn, Cd, Sn has been investigated. It was found that both irradiation and deformation generate additional interference patterns which appear on the background of diffusion peaks. As the intensity of irradiation or deformation increases, the number of these patterns increases to such an extent that they form a single arched dash. Under the effect of irradiation or deformation, single crystals break into fragments and their orientation becomes disrupted. The extent of crystal fragmentation depends on the crystal structure and the intensity of irradiation or amount of deformation. The changes in LiF crystal structure induced by neutron irradiation and plastic deformation are identical, as proved by the increase in the appearance of diffusion peaks observed during neutron irradiation of diamond, silicon, molybdenum, and quartz single crystals and in the deformation of aluminum single crystals. Since the changes in crystal structure produced by irradiation and deformation are similar, the residual defects in crystals produced by deformation and irradiation are also similar. Author

Subject Categories:

  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE