The process in which solids are worn down or ground down by friction, often between particles of the same material. Filter media and ion exchange materials are subject to attrition during backwashing, regeneration and service.
The wearing away of tooth substance due to activities such as chewing and grinding.
Pulverization through abrasion.
process: when rocks are bounced along the riverbed, they knock against each other and wear away, becoming more rounded Click here to see these processes in action.
wearing down the opposition in warfare, such as Egypt's war against Israel, 1969–70
the wearing down of rock particles by friction due to water or wind or ice
a wearing down to weaken or destroy; "a war of attrition"
the act of rubbing together; wearing something down by friction
the breakage and abrasion of resin beads.
wearing away of a tooth due to the opposing tooth and grinding
As the rocks and pebbles are being swept along they bang against each other and they slit up or little bits get knocked off, making them smaller and smaller. This also has the effect of smoothing and rounding the particles too.
To reduce the effectiveness of a force by destroying its materiel and personnel directly.
A rubbing away or wearing down by friction.
boulders collide with one another as they move down the river, and can break into smaller pieces
Wearing or grinding down of a substance by friction. Dust from such processes contributes to air pollution.
wearing away due to friction or rubbing
Gradual wearing away of the biting surfaces of the teeth.
The physical wear caused by the movement of the tooth against another.
Wear of teeth due to activities such as chewing.
Process of wearing out by friction, as with pellets in catalytic converters (attrition severely reduces the useful service life of pellet-type converters)
Loss of structure due to natural wear
Loss of tooth structure due to mechanical action of mastication.
A mechanical milling or grinding process that typically employs a stirred or tumbled container filled with small balls that collide against particles mixed with the balls. The process is widely used for deagglomeration, partial alloying (W-Cu, WC-Co), and particle size reduction in ceramics.
the denudation, or degradation, of adjacent particles by reciprocal wear and tear
Wear caused by rubbing or friction. Produces fine particles that usually contaminate liquid that surrounds the point of attrition. Sometimes referred to as scouring or scoring.
Wearing or grinding down by friction. One of the three basic contributing processes of air pollution; the others being vaporization and combustion.
The normal loss of tooth substance resulting from friction caused by physiologic forces.
a gradual wearing down (in war this would mean gradually wearing down the enemy before destroying them, rather than capturing land)
The gradual lessening of the capacity or effectiveness of a medium. This may occur due to friction, sacrificial properties of the medium, chemical attack on the medium, or contaminant saturation of the medium.
This refers to the 'wearing away', or decrease in cases as they make their way through the criminal justice system; the number of cases investigated by the police which ever result in convictions is a small percentage of the total.
The normal wearing down of the surface of a tooth from chewing.
Attrition is the loss of tooth structure by mechanical forces from opposing teeth. Attrition initially affects the enamel and, if unchecked, may proceed to the underlying dentin. Once past the enamel, attrition quickly destroys the softer dentin.