Magnetic head slider material
AssigneesSumitomo Special Metal Co., Ltd., Nippon Tungsten Co., Ltd.
InventorsToshiaki Wada, Mitsuhiko Furukawa, Michito Miyahara, Masaharu Shiroyama, Kiyohito Misumi, Takashi Kitahira
Life of this patent
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Abstract
A material for magnetic head sliders comprises a mixed powder consisting of 40 to 80% by weight of Al.sub.2 O.sub.3 and 20 to 60% by weight of TiO.sub.2, and further contains, per 100 parts by weight of the Al.sub.2 O.sub.3 and TiO.sub.2 mixture, 0.5 to 5 parts by weight of at least one of CaO, MgO and Y.sub.2 O.sub.3, and 0.5 to 10 parts by weight of ZrO.sub.2.
Claims5
A wear-resistant product which is useful in fabricating magnetic head sliders, said product consisting essentially of 40 to 80% by weight of Al.sub.2 O.sub.3, 20 to 60% by weight of TiO.sub.2, 0.5 to 5 parts by weight, based on 100 parts by weight of combined Al.sub.2 O.sub.3 and TiO.sub.2, of at least one oxide selected from the group consisting of CaO, MgO and Y.sub.2 O.sub.3, and 0.5 to 10 parts by weight, based on 100 parts by weight of combined Al.sub.2 O.sub.3 and TiO.sub.2, of ZrO.sub.2 which has a purity of at least 99.0% and maximum particle diameters of 2 microns;
- said product having a hardness of between about 89.0 and 89.3 (HrA) and a wear resistance of between about 0.1 and about 0.3 mm.sup.3 (pin-disk method).
Dependencies are inferred from the claim text.