Durability of magnetic thin-film rigid disks in nitrogen and helium environments

K. J. Wahl, Y. W. Chung, B. Bhushan, W. J. Rothschild

Research output: Chapter in Book/Report/Conference proceedingChapter


Pin-on-disk experiments were performed using hemispherical pins of manganese zinc ferrite sliding on rigid disks composed of thin films of a sputtered cobalt-nickel-platinum alloy and diamond-like carbon, with perfluoropolyether as the topical lubricant. The durability, as measured by the total distance slid to the point at which the friction coefficient increases rapidly, is poor (40 to 110m) for dry helium and dry nitrogen. The addition of various amounts of water vapor in a nitrogen ambient results in more than two orders of magnitude improvement in durability. The failure mechanism is based on the rate of debris agglomeration in different environments. (from authors' abstract)

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
PublisherNew York, USA, ASME
ISBN (Print)0791800210, 9780791800218
StatePublished - Jan 1 1991

ASJC Scopus subject areas

  • Engineering(all)


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