Breviary Technical Ceramics






5.7.5 Measurements of Abrasion

Measurements of abrasion directly or indirectly characterise the change in shape or mass of a body as a result of abrasion. Because such measurements do not represent properties of the material but rather of the system, it is only worth quoting figures if the stress system and the structure of the tribological system is described at the same time. The following measurements of abrasion are in use:

Linear abrasion figure: Change in thickness of the abraded surface. Symbol: WL Unit: m

Planimetric abrasion figure: The area of a section perpendicular to the abraded surface that is removed. Symbol: Wq Unit: m²

Volumetric abrasion figure: Change in volume of the abraded body (volume abrasion). Symbol: WV Unit: m³

Abrasion mass: Change in volume of the abraded body (mass abrasion). Symbol: Wm Unit: kg

Relative abrasion figure: The ratio between the abrasion figures of an abraded body and of a reference body abraded under identical conditions. Symbol: Wr Unit: - or %

Abrasion resistance: The reciprocal value of the abrasion figure Symbol: 1/W Unit: m-1, m-2, m-3, kg-1

In practice it is common to link the abrasion figure with some reference magnitude. Parameters typically measured include the abrasion speed, abrasion intensity (ratio of abrasion to distance), abrasion/throughput ratio, abrasion-limited life, abrasion-limited throughput quantity.

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