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Effects of ultravacuum and space environment on contact ohmic resistance (AO 138-11)The experiment was aimed at checking compatibility of the aluminum conductors with conventional conductors and contacts under different conditions of manufacturing (mechanical or magnetostrictive crimping) and storage in laboratory or in long-duration space environment. The electrical characteristics of connections built from nickel-plated conductors and glided copper contacts were noted to vary over the duration of the experiment. These variations are unrelated with the crimping or storage conditions or with metal pairing (nickel-plated aluminum/tinned or silver copper). Such evolutions, even slight, are detrimental to connection quality. The same observations hold for some like connections subjected to long-duration thermal cycles. Therefore, work on aluminum technology was reoriented toward a silver aluminum conductor/ golded aluminum contact solution. The first evaluation test performed according to this definition have yielded satisfactory results.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Assie, Jean Pierre
(Aerospatiale Cannes, France)
Perotto, Alfred
(Aerospatiale Cannes, France)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Publication Information
Publication: NASA, Langley Research Center, First LDEF Post-Retrieval Symposium Abstracts
Subject Category
Electronics And Electrical Engineering
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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