境界潤滑下における軸受用亜鉛合金の摩擦表面特性

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タイトル別名
  • Frictional Surface Characteristic of Zinc Base Bearing Alloys in the Condition of Boundary Lubrication
  • キョウカイ ジュンカツカ ニ オケル ジクウケヨウ アエン ゴウキン ノ マサ

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抄録

When a zinc base bearing alloy containing 21 at%Al with 2 at%Si addition slides against a carbon steel in the condition of boundary lubrication, a thin lustrous black film around 1 \micron in thickness is uniformly formed on the surface of the zinc alloy. This alloy with silicon increases the load carrying capacity in the condition of boundary lubrication. On the other hand, a 21 at%Al-zinc alloy without silicon can not form such a film and consequently has only a poor load carrying capacity.<BR>In this study, the frictional surfaces of these two kinds of alloys were analyzed with EPMA and AES. The surface film of the zinc alloy with Si addition is composed of oxides containing Zn, Al, Si and Fe. The silicon content increases in the inner region of the thin film. A large quantity of carbon is found at the outermost surface of the thin film and a small quantity of sulfur throughout the film. However, the frictional surface of the zinc alloy without Si contains little carbon and no sulfur.<BR>It is concluded that the improvement in the load carrying capacity of the zinc alloy containing silicon results mainly from the formation of the thin stable oxide film covered with a large quantity of carbon and a small quantity of sulfur in the presence of lubricating oil.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 48 (4), 377-382, 1984

    公益社団法人 日本金属学会

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