日本金属学会誌

J. Japan Inst. Metals, Vol. 43, No. 12 (1979),
pp. 1168-1174

Wear Resistance and Surface Characteristics of Permalloy and Sendust Alloy Worn by Magnetic Tapes

Shinji Narishige1 and Mitsuo Sato1

1Hitachi Research Laboratory, Hitachi Ltd., Hitachi

Abstract:

In wear tests of Permalloy and Sendust alloy for magnetic heads rubbing against magnetic tapes, it has been found that some lusterless substance is formed on the worn surface. The shape and chemical composition of the lusterless substance are examined by photographing optical bright field and differential interference contrast images and with an Auger electron emission spectroscope.
The lusterless substance can be observed on the worn surfaces with an optical microscope. The surfaces where the substance is formed have larger wear resistance than the surfaces where it is not. The shape of the substance is spotty or spread over all the rubbing area. The substance is raised by about 30 nanometer from the alloy surface, but the number of the scratch lines on the surfaces of the substance is fewer than on the exposed parts of the alloy. Elements contained in the sample alloys and oxygen are detected from the substance.
It is considered that burnishing and oxidation take place on the worn surfaces when magnetic tapes wear off the alloys and the oxides formed on the worn surfaces reduce wear.


(Received 1979/05/30)

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