Sliding Wear of Aluminum-Silicon Carbide Metal Matrix Composites

Abstract

The sliding wear of an aluminum matrix composite, reinforced with different volume fraction of particles, against a stainless-steel slider has been studied. In dry conditions, i.e., unlubricated tests, the pairs (slider and specimen), wear. When rubbing against an aluminum alloy (unreinforced), the slider does not wear but the aluminum alloy wears quickly by adhesion. In dry conditions, both slider and composite wear, but there is a minimum wear rate for this pair at a critical volume fraction of reinforcing particles. Under lubricated conditions, the situation changes dramatically. The composite no longer wears, but the slider wears very quickly. Under water, results are a compromise between the two previous situations, dry and lubricated. These results are explained by a simple, descriptive mechanism, which takes in account both the effect of the shear rate, due to the sliding action in the composite, and the abrasive effect of the particles. A general relationship, which describes the effect of the applied pressure and volume fraction of particles in the composite, is proposed.

Mechanical and tribological properties of Al7475-SiCp composites by stir casting method and wear rate modeling using RSM

“…In general, with increase in sliding distance and load, the wear rate increases in 7075 aluminium alloy [5]. The formation of tribo-layeror mechanically mixed layer has been described to reduce the wear rate [6] and affected by load level, sliding speed and reinforcement content [7][8][9].…”

Wear behavior of high volume Al2O3-reinforced Al7075 matrix composites fabricated by semi-solid powder processing

“…The results obtained for highly loaded composites are in line with previous research on the wear of composites containing low reinforcement content, which indicates that with increasing the reinforcement, wear resistance increases. 35,36…”

“…The results obtained for highly loaded composites are in line with previous research on the wear of composites containing low reinforcement content, which indicates that with increasing the reinforcement, wear resistance increases. 35,36 Wear mechanism. The wear mechanism changed from adhesive-abrasive base alloy to the soft-mild adhesive regime with increasing the Al 2 O 3 content.…”

Mechanical and tribological behaviours of aluminium hybrid composites reinforced by CDA-B4C

“…It is clear that the reinforced particles colloid with the steel surface material leading to transfer of iron and produce a mechanical mixed layer. The mechanically mixed layer formed between the pin and the surface plays a vital role in reduction of wear in the composite samples [55][56][57][58][59][60][61][62]. The oxide and iron peaks present in sample S3 is more when compared with other samples and it has been concluded that wear resistance has increased.…”