The ability of a material to resist surface wear.



Related Terms

FLOW COAT

A coating formed by pouring a liquid material over the object and allowing it to flow over the surface and drain off.

CENTRIFUGAL CASTING

A method for casting metals or forming thermoplastic resins in which the molten material solidifies in and conforms to the shape of the inner surface of a heated, rapidly rotating container.

ABRASION

A general wearing away of a surface by constant scratching, usually due to the presence of foreign matter such as dirt, grit, or metallic particles in the lubricant. It may also cause a break down of the material (such as the tooth surfaces of gears). Lack of proper lubrication may result in abrasion.

ABRASION TEST

The measurement of abrasion resistance, usually by the weighing of a material sample before and after subjecting it to a known abrasive stress throughout a known time period, or by reflectance or surface finish comparisons, or by dimensional comparisons.

ISOSTASY

A supposed equality existing in vertical sections of the earth, whereby the weight of any column from the surface of the earth to a constant depth is approximately the same as that of any other column of equal area, the equilibrium being maintained by plastic flow of material from one part of the earth to another

DECKING

  1. Surface material on a deck. 2. Separating explosive charges containing primers with layers of inert material to prevent passage of concussion.

FLOATING FLOOR

A floor constructed so that the wearing surface is separated from the supporting structure by an insulating layer of mineral wool, resilient quilt, or other material to provide insulation against impact sound.

SPALLING

The breaking off of the surface refractory material as a result of internal stresses.

ANTIREFLECTION COATING

The application of a thin film of dielectric material to a surface to reduce its reflection and to increase its transmission of light or other electromagnetic radiation.

CAVITATION EROSION

A material-damaging process which occurs as a result of vaporous cavitation. 'Cavitation' refers to the occurrence or formation of gas- or vapor- filled pockets in flowing liquids due to the hydrodynamic generation of low pressure (below atmospheric pressure). This damage results from the hammering action when cavitation bubbles implode in the flow stream. Ultra- high pressures caused by the collapse of the vapor bubbles produce deformation, material failure and, finally, erosion of the surfaces.

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