Accession Number:

AD0655652

Title:

ORIENTATION RELATIONS IN SIMPLE THIN FILM-SUBSTRATE COMBINATIONS.

Descriptive Note:

Technical rept.,

Corporate Author:

GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s):

Report Date:

1967-07-15

Pagination or Media Count:

48.0

Abstract:

For oriented overgrowth in simple systems, the importance of a nucleation mechanism based on alignment of close-packed CP directions is assessed by a comprehensive review of the literature. Depending on temperature and crystalline character of the substrate, the mechanism results in either 1 alignment of CP-directions in the deposit with corresponding directions in the substrate or 2 maximization of the number of CP-directions in the deposit plane parallel to the interface. For FCC and HCP metals on NaCl-type and amorphous substrates, approximately 3,000 papers yielded some 600 usable reports representing 42 distinct orientation relationships. Eighty-six percent of the reports represented twenty orientation relationships accounted for by the CP-mechanism. Eight percent of the reports referred to four related orientations not accounted for by this mechanism. The remaining eighteen orientations were, for the most part, supported only by single observations. Thus the weak but long-range forces involved in the CP-mechanism appear to be of primary, though not sole, importance in the nucleation of oriented overgrowths in these simple systems. The observation information is presented in extensive tables. Author

Subject Categories:

  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE