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Basic Adhesion Mechanisms in Thick and Thin Films.
Quarterly technical rept. no. 3, 7 Jan-30 Sep 75,
RCA LABS PRINCETON N J
Pagination or Media Count:
During this quarter, the adhesion strengths between preglazed ceramic substrates and metal foils of gold, silver, and copper were measured. In addition, the adhesion strengths of gold and silver model inks were determined using a two-level method of application, i.e., sequential depositions of glass and metal inks with a preglazing step prior to firing the metal deposit. By comparing the total sintered metal adhesion strength with the chemically derived strength from the foil-glaze measurements, it was possible to ascertain the microstructural contribution. Variations in surface bondability were observed in both gold and silver after prolonged firing andor at excessively high temperatures. This variation was consistent with the wetting and spreading results of E1527 glass on gold and silver presented in the last quarterly report. Chemical analyses of the commercial copper and silver inks are presented.
APPROVED FOR PUBLIC RELEASE