Sliding engine component
AssigneesMahle International GmbH, Mahle Engine Systems UK Ltd
InventorsRoger Gorges, John Carey, Anil Rathod
Life of this patent
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Abstract
A sliding engine component may include a substrate having a surface coated with a first electroplated metallic layer and a second electroplated metallic layer. The first metallic layer may be disposed between the substrate and the second metallic layer. The first metallic layer and the second metallic layer may have a grained structure. The grained structure of each of the first metallic layer and the second metallic layer may have an aspect ratio between a mean grain size perpendicular to the substrate surface and a mean grain size parallel to the substrate surface. The aspect ratio of the second metallic layer may be less than the aspect ratio of the first metallic layer.
Claims19
A sliding engine component, comprising:
- a substrate having a surface coated with a first electroplated metallic layer and a second electroplated metallic layer, the first metallic layer disposed between the substrate and the second metallic layer;
- wherein the first metallic layer and the second metallic layer have a grained structure, and the grained structure of each of the first metallic layer and the second metallic layer having an aspect ratio between a mean grain size perpendicular to the surface of the substrate and a mean grain size parallel to the surface of the substrate;
- and
- wherein the aspect ratio of the second metallic layer is less than the aspect ratio of the first metallic layer, and wherein the aspect ratio of the second metallic layer is less than 1.5:1.
An engine, comprising:
- a sliding engine component, the sliding engine component including:
- a substrate having a surface including a multi-layer coating, the multi-layer coating including a first electroplated metallic layer and a second electroplated metallic layer, the first metallic layer disposed between the substrate and the second metallic layer;
- wherein the first metallic layer and the second metallic layer have a grained structure, and the grained structure of each of the first metallic layer and the second metallic layer having an aspect ratio between a mean grain size perpendicular to the surface of the substrate and a mean grain size parallel to the surface of the substrate, and wherein the aspect ratio of the second metallic layer is less than the aspect ratio of the first metallic layer;
- wherein the first metallic layer and the second metallic layer are each composed of tin to provide tin grains defining the grained structure;
- and
- wherein the aspect ratio of the second metallic layer is less than 1.5:1.
A sliding engine component, comprising:
- a substrate having a surface including a multi-layer coating;
- the multi-layer coating including a first electroplated metallic layer, a second electroplated metallic layer, and a third electroplated metallic layer, the first metallic layer disposed between the substrate and the second metallic layer, and the third metallic layer disposed between the first metallic layer and the second metallic layer;
- wherein the first metallic layer, the second metallic layer, and the third metallic layer have a grained structure, the grained structure of each of the first metallic layer, the second metallic layer, and the third metallic layer having an aspect ratio between a mean grain size perpendicular to the surface of the substrate and a mean grain size parallel to the surface of the substrate;
- and
- wherein the aspect ratio of the second metallic layer is less than the aspect ratio of the first metallic layer, and wherein the aspect ratio of the third metallic layer is less than the aspect ratio of the first metallic layer and greater than the aspect ratio of the second metallic layer.
Dependencies are inferred from the claim text.