Accession Number : ADA305138
Title : Friction and Morphology of Magnetic Tapes in Sliding Contact with Nickel-Zinc Ferrite.
Descriptive Note : Technical paper,
Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER
Personal Author(s) : Miyoshi, Kazuhisa ; Buckley, Donald H. ; Bhushan, Bharat
PDF Url : ADA305138
Report Date : JAN 1984
Pagination or Media Count : 17
Abstract : Friction and morphological studies were conducted with magnetic tapes contacting a Ni-Zn ferrite hemispherical pin in laboratory air at a relative humidity of 40 percent and at 23 C. The results indicate that the binder plays a significant role in the friction properties, morphology, and microstructure of the tape. Comparisons were made with four binders: nitrocellulose; poly(vinyledene) chloride; cellulose acetate; and hydroxyl-terminated, low-molecular-weight polyester added to the base polymer, polyester polyurethane. The coefficient of friction was lowest for the tape with the nitrocellulose binder and increased in the order hydroxyl-terminated, low-molecular-weight polyester resin; poly (vinyledene) chloride; and cellulose acetate. The degree of enclosure of the oxide particles by the binder was highest for hydroxyl-terminated, low-molecular-weight polyester and decreased in the order cellulose acetate, poly (vinyledene) chloride, and nitrocellulose. The nature of deformation of the tape was a factor in controlling friction. The coefficient of friction under elastic contact conditions was considerably lower than under conditions that produced plastic contacts.
Descriptors : *MAGNETIC TAPE, *SLIDING FRICTION, MICROSTRUCTURE, DEFORMATION, MORPHOLOGY, ELASTIC PROPERTIES, CHLORIDES, ZINC, NICKEL, BINDERS, POLYURETHANE RESINS, TRIBOLOGY, POLYESTER PLASTICS, FERRITES, NITROCELLULOSE, SLIDING CONTACTS, POLYVINYLIDENES, CELLULOSE ACETATES.
Subject Categories : Mechanics
Recording and Playback Devices
Distribution Statement : APPROVED FOR PUBLIC RELEASE