Microstructure and Tribological Properties of Aluminum Matrix Composite

Abstract

AlSi5Cu2 alloy matrix composite have been studied by microscopic examination and basic tribological properties was evaluated. Composite material was produced by the mechanical milling and spark plasma sintering technique. After sintering process SiC particles were uniformly distributed in the matrix. The wear and the friction coefficients were determinate as a function of the SiC volume fraction. The addition of SiC wt. % had significant effect on tribological properties of that composites. The increase in reinforcement content improves the wear resistance of obtained materials.

An Experimental Study Of Aluminum Alloy Matrix Composite Reinforced SiC Made By Hot Pressing Method

“…After mechanical alloying composite powder displaying a fine, homogeneous distribution of the reinforcement within the particle (Fig. 4) what was in detail demonstrated in previous work [15][16]. [17] Applied parameters of mechanical alloying of AlSi5Cu2 chips and SiC leads to obtain composite powder where the SiC particles are apparently occluded by Al (Fig.…”

“…From this stage, particles produced by mechanical alloying are composite. Longer time of high-energy milling reach to obtain smaller particles with reduced porosity [16]. Particle size decrease from 250 µm to 3 µm after 40 hours of high-energy milling.…”

“…To minimize the extreme cold welding and prevent high temperature, the process was stopped periodically (45min) after each 15 min of milling. Detailed results of the composite powder preparation and properties have been reported in [14][15][16]. The prepared and identified powder mixtures were finally densified by the hot pressing method in a specially constructed chamber.…”

Influence of Milling Time on the Crystallite Size of AlSi5Cu2/SiC Composite Powder

“…The rings belonging to the α (Al rich solid solution) in the corresponding SADP pattern from the composite powder indicated the nanoscale level of both material components. [14] Applied parameters of mechanical alloying of AlSi5Cu2 chips and SiC leads to obtain composite powder where the SiC particles are apparently occluded by Al (Fig. 6).…”

“…To minimize the extreme cold welding and prevent high temperature, the process was stopped periodically for 45 min after each 15 min of milling. Detailed results of the composite powder preparation and properties have been reported in [11][12][13][14].…”