Hybrid composites – a better choice for high wear resistant materials

Hybrid composites – Metallic and ceramic reinforcements influence on mechanical and wear behavior

“…4(b)), for all the composites where SiC was added. This observation is in line with other studies regarding aluminum alloys reinforced with SiC, when produced by powder metallurgy [9,28]. EDS spectrum shown in Fig.…”

“…In this study, the addition of 5 wt.% SiC to the AlSi-11.25%Ti composite led to a significant 32.1% wear rate reduction (when comparing to unreinforced AlSi), confirming that the addition of SiC leads to high wear resistance mainly due to the load-supporting role of the ceramic particles. This reduction in the wear rate of the hybrid composite can also be due to the presence of dislocations at the Al/ SiC interface [9] causing matrix work hardening [5].…”

“…It is known that the introduction of SiC particles leads to an improvement in the tribological properties of Al alloys processed by PM or casting routes, once SiC particles protect the matrix from wear [9,10]. Additionally, the thermal expansion dislocation strengthening and matrix work hardening (due to the SiC particles) can also help to explain a higher wear resistance of the hybrid, when comparing to AlSi-11.25%Ti composite.…”

“…Besides strength and elastic modulus, aluminum alloys reinforced by SiC particulates (SiC p ) exhibit improved wear resistance, as compared to aluminum alloy [1]. It has been shown that the wear rate of aluminum alloys decreases with the addition of SiC [7,8], mainly due to the SiC particle that protects the aluminum matrix from wear [9,10].…”

Damping Behavior of Metal Matrix Composites

“…Sudarshan and Surappa [23] also showed that fly ash/A356 MMCs, with a proper volume fraction of fly ash particulate, exhibited improved ambient temperature damping capacity, as well as the hardness, elastic modulus compared to unreinforced alloy. The utilization of rice husk ash, an agricultural waste byproduct in the aluminum matrix has been studied by Prasad et al [2,[24][25][26]. The results confirmed that the damping capacity increases with the increase in the rice husk content without sacrificing mechanical properties.…”