Evaluation of Multilayer Thin Films.
Final rept. 9 May-27 Aug 73 on Phase 4,
ARTECH CORP FALLS CHURCH VA
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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
- Laminates and Composite Materials