Accession Number : AD0767724

Title :   Evaluation of Multilayer Thin Films.

Descriptive Note : Final rept. 9 May-27 Aug 73 on Phase 4,

Corporate Author : ARTECH CORP FALLS CHURCH VA

Personal Author(s) : Ordway,Fred ; Graves,James R.

Report Date : SEP 1973

Pagination or Media Count : 26

Abstract : Multilayer thin-film composites of carbon-aluminum were prepared by vacuum evaporation of alternating layers a few hundred Angstroms thick. Up to 94 pairs of successive layers were deposited to produce composite films up to 12.5 micrometers (0.0005 in.) thick. The specimens were evaporated through a photoetched metal mask to produce a 'dogbone' shape for tensile testing, and were successfully removed without breakage by applying a thin release film of gold to the glass substrate before deposition of the composite and wetting the gold film with a small quantity of mercury afterward. A method is proposed by which the true tensile strength of the composite may be determined. (Modified author abstract)

Descriptors :   (*LAMINATES, *FILMS), ALUMINUM, CARBON, TENSILE PROPERTIES, VAPOR PLATING, VACUUM APPARATUS, DEPOSITION, TEST METHODS

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE