Abstract: The friction and wearing behavior of ZL109/ fly ash particles reinforced MMCs made by squeeze-casting were investigated under different conditions. The results indicate that the wear resistance of the composites is improved as fly ash particles are mixed. Comparing the composites with its matrix alloy, the formers have the lower friction coefficient. Under lower loads, a tribolayer is formed on the worn surface, which contributes to the decreasing of the friction coefficient. Under higher loads, the tribolayer is destroyed and then affects its effect of decreasing the friction coefficient. Fly ash beset in the MMCs acts as supporting load and limiting the direct contact between Al matrix and the steel slider. Fly ash falling off acts as “rolling ball”, forms the “three body” friction on the worn surface, which contributes to improve the wearing resistance of the MMCs.
Friction and wearing behavior of aluminum matrix fly ash particles reinforced composites
Abstract:
The friction and wearing behavior of ZL109/ fly ash particles reinforced MMCs made by squeeze-casting were investigated under different conditions. The results indicate that the wear resistance of the composites is improved as fly ash particles are mixed. Comparing the composites with its matrix alloy, the formers have the lower friction coefficient. Under lower loads, a tribolayer is formed on the worn surface, which contributes to the decreasing of the friction coefficient. Under higher loads, the tribolayer is destroyed and then affects its effect of decreasing the friction coefficient. Fly ash beset in the MMCs acts as supporting load and limiting the direct contact between Al matrix and the steel slider. Fly ash falling off acts as "rolling ball", forms the "three body" friction on the worn surface, which contributes to improve the wearing resistance of the MMCs.